CN211696880U - Probe for measuring full parameters of subsonic three-dimensional steady-state flow field - Google Patents
Probe for measuring full parameters of subsonic three-dimensional steady-state flow field Download PDFInfo
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- CN211696880U CN211696880U CN202020129971.7U CN202020129971U CN211696880U CN 211696880 U CN211696880 U CN 211696880U CN 202020129971 U CN202020129971 U CN 202020129971U CN 211696880 U CN211696880 U CN 211696880U
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Abstract
The invention belongs to the technical field of flow field testing, and particularly relates to a probe for measuring full parameters of an subsonic three-dimensional steady-state flow field. The probe head is cylindrical, the top end of the cylindrical head is provided with an inwards concave ball socket structure in the direction perpendicular to the central line of the cylinder, the inner wall of the ball socket is provided with a pressure measuring middle hole, a pressure measuring upper hole, a pressure measuring lower hole, a pressure measuring left hole and a pressure measuring right hole which are not communicated with each other, a cross-shaped convection heat exchange groove is formed in the back of the ball socket, and the temperature sensor is arranged in the convection heat exchange groove and is opposite to the central line of the pressure. The probe can simultaneously measure the parameters of total temperature, total pressure, static temperature, static pressure, Mach number, deflection angle, pitch angle, speed, density and the like of the subsonic three-dimensional steady-state flow field, and has the characteristics of small size, long service life, wide air flow insensitivity angle, high reliability, high spatial resolution and high measurement precision.
Description
Technical Field
The invention belongs to the technical field of flow field testing, and particularly relates to a probe for measuring full parameters of a subsonic three-dimensional steady-state flow field, which is suitable for measuring full parameters of the subsonic three-dimensional steady-state flow field between an inlet, an outlet and an impeller stage of a subsonic air inlet channel, a fan, an air compressor and the like in an impeller machine.
Background
For subsonic three-dimensional stable flow fields between inlets, outlets and impeller stages of fans, gas compressors and the like in impeller machinery, the flow fields are disordered and show strong three-dimensionality due to rotation of rotors, staggered arrangement of movable and static blade rows, interaction of main flows and blade tip leakage flows, mutual mixing of the main flows and wake tracks and the like, and the problems of accurately measuring complex three-dimensional flow field parameters by using the existing testing technology and measuring means exist.
In the existing probe test technology, the following two methods are generally adopted for measuring the parameters of the complex three-dimensional flow field: one is that the pressure probe is used to obtain the pressure, Mach number, flow direction and other parameters of the flow field, and the temperature probe is used to measure the temperature in the flow field, on one hand, the pressure probe and the temperature probe are used separately to measure and can not obtain the flow parameters in the flow field at the same time, so in the actual measurement, not only the measurement time and cost are increased, but also the precision of the test measurement is affected by the position error of the flow field change and the movement of the displacement mechanism during the two measurements; on the other hand, to acquire all three-dimensional steady-state flow field parameters at the same time, a plurality of probes are inevitably used for testing, so that the interference of the probes on the flow of the flow field is increased, the test complexity is increased, and the measured flow parameters cannot be guaranteed to come from the same streamline, so that extra test errors are brought, and the precision of the measurement result is reduced. The other is to adopt a temperature and pressure combined probe for measurement, and the traditional temperature and pressure combined probe arranges a temperature sensor and a pressure sensing hole on the windward side of the probe at the same time to be opposite to incoming flow, so that a larger space on the surface of the probe is required to be occupied, and the spatial resolution of flow field measurement is poor.
According to the existing total temperature testing technology, the key point that the temperature probe can accurately measure the total temperature of the airflow lies in whether the airflow can be absolutely stagnant at a temperature measuring point, so that most of the temperature probes are designed according to the fact that the temperature sensor is just opposite to the main flow direction, the stagnation structure for measuring the total temperature of the fluid conventionally adopts a stagnation cover structure, the temperature sensor is arranged in the stagnation cover, and the design has the defects that: firstly, the temperature sensor is directly washed by fluid, is easily influenced by oil drops, dust and the like mixed in airflow, is easily damaged, and can influence the accuracy of temperature measurement; secondly, the strength of the temperature sensor is improved by increasing the size of the temperature sensor, and the size of the stagnation cover is added, so that the size of the probe is larger, the requirement of temperature measurement in narrow spaces such as compressor blades, turbine blades and the like in impeller machinery cannot be met, and the spatial resolution is poorer; thirdly, the insensitive angle of the airflow is small, and when the deflection angle or the pitch angle of the incoming flow to be detected is large, the airflow cannot be fully stagnated; meanwhile, the surface heat exchange of the temperature sensor is insufficient, and the precision of total temperature measurement is influenced.
The above test problems restrict researchers from deeply studying the internal flow field of the impeller machine, and particularly if data acquired by a pressure probe and a temperature probe are used for processing, extra errors are brought when parameters such as speed and the like are combined and calculated; the temperature sensors of the existing temperature and pressure combined probe are positioned on the windward side of the probe head, which is opposite to the mainstream, so that the defects of the temperature probe exist, the requirement on spatial resolution in measurement is difficult to meet, the accurate measurement of all parameters of a subsonic three-dimensional steady flow field is not applicable, and researchers hope to simultaneously and accurately acquire all parameter information in the flow field. Therefore, a probe for measuring the whole parameters of the subsonic three-dimensional steady-state flow field is urgently needed, and is used for measuring the whole parameters of the subsonic three-dimensional steady-state flow field between an inlet, an outlet and an impeller stage of a subsonic air inlet channel, a fan, an air compressor and the like in an impeller machine.
Disclosure of Invention
The probe aims at solving the problems that the existing probe cannot simultaneously measure the total temperature, the total pressure, the static temperature, the static pressure, the Mach number, the deflection angle, the pitch angle, the speed and the density parameter of a subsonic three-dimensional steady-state flow field, and the problems that the existing temperature probe is large in size, poor in spatial resolution, small in air flow insensitivity angle, easy to damage a temperature sensor, short in service life, low in reliability and low in measurement precision.
The invention provides a probe for measuring the whole parameters of an subsonic three-dimensional steady-state flow field, wherein the head of the probe is cylindrical, the top end of the cylindrical probe is provided with an inwards concave spherical pit-shaped structure in the direction vertical to the central line of a cylinder, the central line of a spherical socket is vertical to and intersected with the central line of the cylinder, a pressure measuring middle hole is arranged at the position of the spherical socket opposite to the main flow direction, a pressure measuring upper hole, a pressure measuring lower hole, a pressure measuring left hole and a pressure measuring right hole which are not communicated with each other are uniformly arranged on the side wall of. In addition, the design thought of the traditional total temperature probe is abandoned, based on years of research of the applicant, the layout and the structural design that the temperature sensor is placed on the leeward side of the head part of the probe opposite to the ball socket are creatively provided, the leeward side of the head part of the probe is provided with the cross-shaped convection heat exchange groove, the temperature sensor is placed in the cross-shaped convection heat exchange groove and faces the central line of the pressure measuring mesopore, the impact of airflow on the temperature sensor and the influence of dust and oil drops mixed in the airflow on the temperature sensor are effectively reduced, and the service life of the temperature sensor is greatly prolonged; the size of the head of the probe is effectively reduced, and the spatial resolution is improved; the convection heat transfer between the air flow and the temperature sensor is enhanced, and the temperature recovery coefficient is high and stable within a large deflection angle range. Most importantly, the method can simultaneously measure the total temperature, the total pressure, the static temperature, the static pressure, the Mach number, the deflection angle, the pitch angle, the speed and the density parameter of the subsonic three-dimensional steady-state flow field, and makes up the defects of the traditional three-dimensional steady-state flow field measuring method.
The technical scheme of the invention is as follows:
1. the utility model provides a measure probe of three-dimensional steady state flow field holoparameter of subsonic, by probe head (1), temperature sensor (2), convection current heat transfer groove (3), adiabatic insulating seal (4), temperature sensor cable draw forth passageway (5), pressure measurement mesopore (6), pressure measurement lower punch (7), pressure measurement upper punch (8), pressure measurement right side hole (9), pressure measurement left side hole (10), draw and press pipe passageway (11), probe branch (12), draw and press pipe (13) and temperature sensor cable (14) to constitute, its characterized in that: probe head (1) is cylindrical, the perpendicular cylinder central line direction in cylindrical top sets up the socket shape structure of an indent, the ball socket central line is perpendicular and crossing with the cylinder central line, the ball socket just sets up pressure measurement mesopore (6) to mainstream direction department, the ball socket lateral wall evenly sets up each other not communicating pressure measurement lower punch (7), pressure measurement upper punch (8), pressure measurement right side hole (9), pressure measurement left side hole (10), probe head (1) leeward side back to the ball socket sets up cross convection current heat transfer groove (3), the different positions in groove both can admit air, also can give vent to anger, flow direction realization self-adaptation along with the incoming flow, and strengthen the flow of air current in the groove.
2. Further, the columniform diameter of probe head (1) is 2 ~ 8 millimeters, length is 5 ~ 45 millimeters, five circular leading pressure pipe passageways (11) and a circular temperature sensor cable extraction passageway (5) that do not communicate with each other are seted up along the probe axial, five circular leading pressure pipe passageways (11) communicate with pressure measurement mesopore (6) in probe head (1) ball socket respectively, pressure measurement lower hole (7), pressure measurement upper hole (8), pressure measurement right pore (9), pressure measurement left pore (10) intercommunication to respectively with encapsulate five leading pressure pipe (13) of probe head (1) and probe branch (12) junction, leading pressure pipe (13) draw out probe branch (12) afterbody through leading pressure pipe passageway (11) in probe branch (12).
3. Furthermore, the diameter of a concave ball socket structure arranged in the direction perpendicular to the central line of the column body at the probe head part (1) is 1-6 mm, the distance between the center of the ball and the side surface of the column body of the probe head part (1) is 0-1/6 times of the diameter of the ball socket, the height between the central line of the ball socket and the end surface of the probe head part is 0.5-4 mm, the pressure measuring middle hole (6), the pressure measuring lower hole (7), the pressure measuring upper hole (8), the pressure measuring right hole (9) and the pressure measuring left hole (10) are all round and have the same diameter and are 0.1-1.5 mm, the central line of the pressure measuring middle hole (6) is superposed with the central line of the ball socket, the pressure measuring lower hole (7), the pressure measuring upper hole (8), the pressure measuring right hole (9) and the pressure measuring, and the central line of the ball socket is vertical to the side wall of the ball socket, and the angle formed by the central line of the pressure measuring central hole is 20-80 degrees.
4. Furthermore, the convection heat exchange groove (3) is a rectangle with the same width, the centers of the grooves coincide, the width is 1-3 mm, the length of the groove parallel to the central line of the cylinder of the probe head (1) is 0.8-6 mm, the depth of the groove vertical to the central line reaches the position of the head of the temperature sensor (2), the diameter of the circular channel where the head of the temperature sensor (2) is located is 0.8-3.5 mm, the axial length of the circular channel is 1-7 mm, the axial line of the circular channel coincides with the axial line of the cable leading-out channel (5) of the temperature sensor, the central axis of the cable leading-out channel (5) of the temperature sensor is 0.5-3 mm away from the central line of the cylinder, the central line of the cable leading-out channel (5) of the temperature sensor, the central line of the cylinder and the central line of the pressure measuring mesopore (6) are on the same plane, the head of the, the heat insulation sealing piece (4) and the temperature sensor (2) are installed and fixed on a circular channel firstly when the heat insulation sealing piece (4) and the temperature sensor (2) are installed, a temperature sensor cable (14) is led out of the tail of a probe supporting rod (12) through a temperature sensor cable leading-out channel (5) in a probe, then an opening on the end face of the probe head (1) is covered, welded and packaged, and the axis of a cylinder of the probe head (1) is coincided with the axis of a cylinder of the probe supporting rod (12).
5, further calibrating the probe through a calibration wind tunnel to obtain a probe calibration curve; in actual measurement, based on data measured by the five pressure measuring holes and the temperature sensor (2), total temperature, total pressure, static temperature, static pressure, Mach number, deflection angle, pitch angle, speed and density parameters of a measured three-dimensional steady-state flow field can be obtained simultaneously through data processing according to a calibration coefficient curve and a formula obtained by calibrating a wind tunnel, the service life of the temperature sensor (2) is prolonged, the insensitive angle range of airflow is widened, and the measurement spatial resolution and the measurement precision are improved.
The invention has the beneficial effects that:
compared with the existing subsonic three-dimensional steady-state flow field probe, the probe for measuring the subsonic three-dimensional steady-state flow field full parameters can achieve the following beneficial effects after calibration of the wind tunnel:
the beneficial effects are that: the traditional five-hole pressure probe and the traditional total temperature probe can only carry out pressure or temperature measurement independently, and the invention can simultaneously measure the total temperature, the static temperature, the total pressure, the static pressure, the deflection angle, the pitch angle, the Mach number, the density and the speed parameters of the subsonic three-dimensional steady-state flow field, thereby effectively reducing the interference on the measured flow field, improving the test precision, simplifying the test operation and reducing the test cost.
The beneficial effects are that: the traditional temperature probe and temperature pressure combined probe is characterized in that a temperature sensor is just opposite to incoming flow, temperature measurement is carried out on the temperature sensor by means of incoming flow stagnation, airflow directly impacts the temperature sensor, the temperature sensor is easily damaged, and the measurement insensitive angle is narrow. The temperature sensor is creatively arranged on the leeward side of the head part of the probe, so that the design not only increases the range of the total temperature insensitive angle, but also can avoid the impact of the front side of the incoming flow on the temperature sensor and reduce the influence of impurities such as dust, oil drops and the like in the incoming flow on the temperature sensor, ensure the measurement precision and effectively prolong the service life of the temperature sensor.
The beneficial effects are three: the traditional temperature and pressure combined probe adjacently places a temperature sensor and a pressure sensing hole on the windward side of the head of the probe, so that the size of the head of the probe is increased, the interference of a flow field is large, the installation is difficult, and the spatial resolution is reduced. According to the invention, five pressure sensing holes are arranged in the concave ball socket at the windward side of the probe head, and the temperature sensor is arranged at the leeward side of the probe head opposite to the pressure sensing holes, so that simultaneous measurement of multiple parameters on the same streamline is realized, the sufficient spatial resolution of the measurement is ensured, the space of the probe head is utilized as much as possible, and the size of the probe head is reduced.
The beneficial effects are four: the traditional total temperature measurement needs to add an additional stagnation cover, and the heat exchange on the surface of the temperature sensor is insufficient inevitably during measurement, so that the precision of the total temperature measurement is influenced. The invention utilizes the convection vortex flow structure in the leeward side separation area of the probe head to effectively strengthen the heat exchange between the airflow and the temperature sensor, and simultaneously, the back part is provided with the cross-shaped convection heat exchange groove.
Drawings
Fig. 1 is a schematic structural diagram of a probe for measuring full parameters of a subsonic three-dimensional steady-state flow field in the first embodiment of the present invention.
Fig. 2 is a top view of fig. 1.
Fig. 3 is a left side view of fig. 1.
Fig. 4 is a view from direction B of fig. 1.
Wherein: 1-probe head, 2-temperature sensor, 3-convection heat exchange groove, 4-heat insulation sealing element, 5-temperature measuring channel, 6-pressure measuring middle hole, 7-pressure measuring lower hole, 8-pressure measuring upper hole, 9-pressure measuring right hole, 10-pressure measuring left hole, 11-pressure leading pipe channel, 12-probe supporting rod, 13-pressure leading pipe and 14-temperature measuring leading wire.
FIG. 5 is a schematic diagram of a probe for measuring a three-dimensional flow field in an inlet according to an embodiment of the invention.
Wherein: 1-inlet channel wall, 2-probe of the invention.
FIG. 6 is a schematic diagram of a probe used for measuring a compressor interstage three-dimensional flow field in the second embodiment of the invention.
Wherein: 1-casing wall, 2-hub wall, 3-first-stage stator, 4-second-stage rotor, 5-probe of the invention, 6-second-stage stator.
Fig. 7 is a schematic structural diagram of a probe for measuring full parameters of a subsonic three-dimensional steady-state flow field in the second embodiment of the present invention.
Fig. 8 is a left side view of fig. 7.
Fig. 9 is a top view of fig. 7.
Wherein: 1-probe head, 2-temperature sensor, 3-convection heat exchange groove, 4-heat insulation sealing piece, 5-temperature measuring channel, 6-pressure measuring middle hole, 7-pressure measuring lower hole, 8-pressure measuring upper hole, 9-pressure measuring right hole, 10-pressure measuring left hole, 11-pressure leading pipe channel, 12-probe supporting rod, 13-pressure leading pipe and 14-temperature measuring lead.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.
The first embodiment is as follows:
for an aircraft engine air inlet channel, the flow channel is longer, the boundary layer is thicker, the incoming flow is more uniform, but because the speed in the air inlet channel is higher, impurities such as dust and rainwater can be contained. The probe head (1) and the support rod (12) have larger diameters to ensure strength and rigidity; the pressure sensing holes (6, 7, 8, 9, 10) can select larger diameter to prevent from being polluted by impurities such as dust, rain water and the like; the temperature sensor can adopt a sheathed thermocouple to ensure the service life, so the following embodiments can be adopted:
fig. 1 to 4 show a probe for measuring full parameters of an subsonic three-dimensional steady-state flow field according to the present invention, and fig. 5 shows a schematic view of the probe for measuring a three-dimensional flow field of an engine inlet. The utility model provides a measure probe of three-dimensional steady state flow field holoparameter of subsonic, by probe head (1), temperature sensor (2), convection current heat transfer groove (3), adiabatic insulating seal (4), temperature sensor cable draw forth passageway (5), pressure measurement mesopore (6), pressure measurement lower punch (7), pressure measurement upper punch (8), pressure measurement right side hole (9), pressure measurement left side hole (10), draw and press pipe passageway (11), probe branch (12), draw and press pipe (13) and temperature sensor cable (14) to constitute, its characterized in that: probe head (1) is cylindrical, the perpendicular cylinder central line direction in cylindrical top sets up the socket shape structure of an indent, the ball socket central line is perpendicular and crossing with the cylinder central line, the ball socket just sets up pressure measurement mesopore (6) to mainstream direction department, the ball socket lateral wall evenly sets up each other not communicating pressure measurement lower punch (7), pressure measurement upper punch (8), pressure measurement right punch (9) and pressure measurement left punch (10), probe head (1) leeward side back to the ball socket sets up cross convection current heat transfer groove (3), the different positions in groove both can admit air, also can give vent to anger, along with the current direction realization self-adaptation, and strengthen the flow of air current in the groove.
The cylindrical diameter of probe head (1) is 8 millimeters, length is 45 millimeters, five circular pressure leading pipe channels (11) and a circular temperature sensor cable leading-out channel (5) that do not communicate with each other are seted up along the probe axial, five circular pressure leading pipe channels (11) respectively with pressure measurement mesopore (6) in the probe head ball socket, pressure measurement lower hole (7), pressure measurement upper hole (8), pressure measurement right hole (9), pressure measurement left hole (10) intercommunication, and respectively with encapsulate five pressure leading pipe (13) of probe head (1) and probe branch (12) junction intercommunication, pressure leading pipe (13) draw out probe branch (12) afterbody through pressure leading pipe channel (11) in probe branch (12).
The diameter of a concave ball socket structure arranged in the direction perpendicular to the central line of a column body at the head part (1) of the probe is 6 mm, the center of a ball is positioned on the side surface of a cylinder at the head part (1) of the probe, the distance between the central line of the ball socket and the end surface of the head part (1) of the probe is 4 mm, a pressure measuring middle hole (6), a pressure measuring lower hole (7), a pressure measuring upper hole (8), a pressure measuring right hole (9) and a pressure measuring left hole (10) are circular and have the same diameter, and are 1 mm, the central line of the pressure measuring middle hole (6) coincides with the central line of the ball socket, the pressure measuring lower hole (7), the pressure measuring upper hole (8), the pressure measuring right hole (9) and the pressure measuring left hole (10) are positioned on the same axial position of the central line.
The convection heat exchange groove (3) is rectangular with the same width and has the center coinciding, the width is 3 mm, the groove length parallel to the central line of the cylinder of the probe head (1) is 6 mm, the groove depth vertical to the central line reaches the position of the head of the temperature sensor (2), the diameter of the circular channel where the head of the temperature sensor (2) is located is 3 mm, the axial length of the circular channel is 7 mm, the axis of the circular channel coincides with the axis (5) of the cable leading-out channel of the temperature sensor, the central axis of the cable leading-out channel of the temperature sensor (5) is 1.5 mm away from the central line of the cylinder, the central axis of the cable leading-out channel of the temperature sensor (5), the central line of the cylinder and the central line of the pressure measuring mesopore (6) are on the same plane, the head of the temperature sensor (2) is positioned on the, the heat insulation sealing piece (4) and the temperature sensor (2) are installed and fixed on a circular channel firstly when the heat insulation sealing piece (4) and the temperature sensor (2) are installed, a temperature sensor cable (14) is led out of the tail of a probe supporting rod (12) through a temperature sensor cable leading-out channel (5) in a probe, then an opening on the end face of the probe head (1) is covered, welded and packaged, and the axis of a cylinder of the probe head (1) is coincided with the axis of a cylinder of the probe supporting rod (12).
The probe for measuring the whole parameters of the subsonic three-dimensional steady-state flow field can measure the total temperature, the total pressure, the static temperature, the static pressure, the Mach number, the deflection angle, the pitch angle, the speed and the density of the subsonic three-dimensional steady-state flow field. The specific use method is as follows:
the first step is as follows: flowing an incoming flow through a probe head in a calibrated wind tunnel of known incoming flow mach number and temperature;
the second step is that: measuring the pressure of 5 pressure sensing holes on the windward side surface of the probe and the temperature of a temperature sensor on the leeward side under different working conditions;
the third step: and determining calibration curves of total pressure coefficients, static pressure coefficients, deflection angle coefficients and total temperature recovery coefficients under different Mach numbers and different deflection angles and pitch angles through data processing according to the data obtained by calibration. The yaw angle coefficient, pitch angle coefficient, total pressure coefficient, static pressure coefficient and temperature recovery coefficient are defined as follows:
wherein, CpyAs coefficient of deflection angle, CppIs the coefficient of pitch angle, CptIs the total pressure coefficient, CpsIs a static pressure coefficient, CTFor the temperature recovery coefficient, the total pressure, the static pressure, the total temperature and the static temperature of the incoming flow in the wind tunnel are calibrated to be P respectivelyt、Ps、TtAnd TsThe pressure values measured by the middle hole, the left hole, the right hole, the upper hole and the lower hole of the five-hole pressure probe are respectively P1、P2、P3、P4And P5The temperature value measured by the temperature sensor is Tp。
The fourth step: when the three-dimensional steady-state flow field temperature measuring probe is used, the probe is inserted into a measured flow field to obtain pressure measured by the five pressure measuring holes and temperature measured by the temperature sensor, and the total temperature, total pressure, static temperature, static pressure, Mach number, deflection angle, pitch angle, speed and density of the three-dimensional steady-state flow field are obtained by combining the following formulas according to calibration coefficient curves in experimental calibration based on the pressure measured by the five pressure measuring holes and the temperature data measured by the temperature sensor.
c2＝γRTs
Ps＝ρRTs
Wherein gamma is the adiabatic exponent of the flow field, Ma is the mach number of the flow field, v is the flow field velocity, c is the local acoustic velocity of the flow field, ρ is the incoming flow density, and R is the gas constant.
That is, the total temperature, total pressure, static temperature, static pressure, Mach number, deflection angle, pitch angle, speed and density of the subsonic three-dimensional steady-state flow field can be obtained by adopting a single probe.
The second embodiment:
for the measurement of the three-dimensional flow field between turbine stages, the measurement space is narrow, the incoming flow three-dimensional performance is strong, in order to ensure the spatial resolution, the transverse size of the probe head and the diameter of a pressure measuring hole are selected to be small, and the temperature sensor can adopt a bare wire thermocouple with smaller size to ensure the fine measurement and improve the measurement precision, so the following implementation mode can be adopted:
fig. 6 to 8 show a probe for measuring full parameters of an subsonic three-dimensional steady-state flow field, and fig. 9 shows a schematic diagram of the probe for measuring an interstage three-dimensional flow field of a compressor. The invention discloses a probe for measuring all parameters of a subsonic three-dimensional steady-state flow field, which consists of a probe head (1), a temperature sensor (2), a convection heat exchange groove (3), a heat insulation sealing element (4), a temperature sensor cable leading-out channel (5), a pressure measuring middle hole (6), a pressure measuring lower hole (7), a pressure measuring upper hole (8), a pressure measuring right hole (9), a pressure measuring left hole (10), a pressure guiding pipe channel (11), a probe supporting rod (12), a pressure guiding pipe (13) and a temperature sensor cable (14), and is characterized in that: the probe head (1) is cylindrical, an inwards concave spherical socket-shaped structure is arranged in the direction perpendicular to the central line of the cylinder at the top end of the cylinder, the central line of the spherical socket is perpendicular to the central line of the cylinder and is intersected with the central line of the cylinder, the spherical socket is just opposite to the mainstream direction and is provided with a pressure measuring middle hole (6), the side wall of the spherical socket is uniformly provided with a pressure measuring lower hole (7), a pressure measuring upper hole (8), a pressure measuring right hole (9) and a pressure measuring left hole (10) which are not communicated with each other, and the leeward side of the probe head (.
The cylindrical diameter of probe head (1) is 3 millimeters, length is 10 millimeters, five circular pressure leading pipe channels (11) and a circular temperature sensor cable leading-out channel (5) which are not communicated with each other are arranged along the axial direction of the probe, the five circular pressure leading pipe channels (11) are respectively communicated with a pressure measuring middle hole (6) in a ball socket of the probe head (1), a pressure measuring lower hole (7), a pressure measuring upper hole (8), a pressure measuring right hole (9) and a pressure measuring left hole (10) and are respectively communicated with five pressure leading pipes (13) which are packaged at the joint of the probe head (1) and a probe supporting rod (12), and the tail of the probe supporting rod (12) is led out from the pressure leading pipes (13) through the pressure leading pipe channels (11) in the probe supporting rod (12).
The probe head (1) is perpendicular to the diameter of a concave ball socket structure arranged in the direction of a central line of a column and has a diameter of 2 mm, the distance from the center of a ball to the side surface of a cylinder of the probe head (1) is 1/6 times of the diameter of the ball socket, the distance from the central line of the ball to the end surface of the probe head (1) is 1.5 mm, a pressure measuring middle hole (6), a pressure measuring lower hole (7), a pressure measuring upper hole (8), a pressure measuring right hole (9), a pressure measuring left hole (10) are circular and have the same diameter and are 0.3 mm, the central line of the pressure measuring middle hole (6) is superposed with the central line of the ball socket, the pressure measuring lower hole (7), the pressure measuring upper hole (8), the pressure measuring right hole (9) and the pressure measuring left hole (10) are positioned on the same axial position of the central line of the ball socket and are.
The convection heat exchange groove (3) is rectangular with the same width and the center is coincided, the width is 1.5 mm, the length of the groove parallel to the central line of the cylinder of the probe head (1) is 2 mm, the depth of the groove vertical to the central line reaches the position of the head of the temperature sensor, the diameter of the circular channel where the head of the temperature sensor is located is 1 mm, the length of the circular channel along the axial direction is 3 mm, the axis of the circular channel is coincided with the axis (5) of the cable leading-out channel of the temperature sensor, the central axis of the cable leading-out channel of the temperature sensor is 0.5 mm away from the central line of the cylinder, the central axis of the cable leading-out channel of the temperature sensor, the central line of the cylinder and the central line of the pressure measuring mesopore (6) are on the same plane, the head of the temperature sensor (2) is positioned on the intersection point of the central, the temperature sensor (2) is fixed through the heat insulation sealing piece (4), the heat insulation sealing piece (4) plays a role in heat insulation, sealing and fixing, the temperature sensor (2) and the heat insulation sealing piece (4) are firstly installed and fixed on a circular channel when the heat insulation sealing piece (4) and the temperature sensor (2) are installed, a temperature sensor cable (14) is led out of the tail of the probe supporting rod (12) through a temperature sensor cable leading-out channel (5) in the probe, then an opening on the end face of the probe head (1) is covered, welded and packaged, and the cylindrical axis of the probe head (1) is superposed with the cylindrical axis of the probe supporting rod (12).
Claims (1)
1. The utility model provides a measure probe of three-dimensional steady state flow field holoparameter of subsonic, by probe head (1), temperature sensor (2), convection current heat transfer groove (3), adiabatic insulating seal (4), temperature sensor cable draw forth passageway (5), pressure measurement mesopore (6), pressure measurement lower punch (7), pressure measurement upper punch (8), pressure measurement right side hole (9), pressure measurement left side hole (10), draw and press pipe passageway (11), probe branch (12), draw and press pipe (13) and temperature sensor cable (14) to constitute, its characterized in that: the probe head (1) is cylindrical, an inward concave spherical socket-shaped structure is arranged at the top end of the cylindrical structure in a direction perpendicular to the central line of the cylinder, the central line of the spherical socket is perpendicular to and intersected with the central line of the cylinder, a pressure measuring middle hole (6) is arranged at the position of the spherical socket opposite to the main flow direction, pressure measuring lower holes (7), pressure measuring upper holes (8), pressure measuring right holes (9) and pressure measuring left holes (10) which are not communicated with each other are uniformly arranged on the side wall of the spherical socket, a cross-shaped convection heat exchange groove (3) is arranged at the leeward side of the probe head (1) opposite to the spherical socket, air can be fed or discharged from different positions of the groove, self;
the probe head (1) is cylindrical, the diameter is 2-8 mm, the length is 5-45 mm, five circular pressure leading pipe channels (11) and a circular temperature sensor cable leading-out channel (5) which are not communicated with each other are arranged along the axial direction of the probe, the five circular pressure leading pipe channels (11) are respectively communicated with a pressure measuring middle hole (6), a pressure measuring lower hole (7), a pressure measuring upper hole (8), a pressure measuring right hole (9) and a pressure measuring left hole (10) in a ball socket of the probe head (1) and are respectively communicated with five pressure leading pipes (13) which are packaged at the joint of the probe head (1) and a probe supporting rod (12), and the pressure leading pipes (13) lead out the tail of the probe supporting rod (12) through the pressure leading pipe channels (11) in the probe supporting rod (12);
the diameter of a concave ball socket structure arranged in the direction perpendicular to the central line of a column body at the probe head part (1) is 1-6 mm, the distance between the center of a ball and the side surface of the cylinder of the probe head part (1) is 0-1/6 times of the diameter of the ball socket, the height between the central line of the ball socket and the end surface of the probe head part is 0.5-4 mm, a pressure measuring middle hole (6), a pressure measuring lower hole (7), a pressure measuring upper hole (8), a pressure measuring right hole (9) and a pressure measuring left hole (10) are all round and have the same diameter and are 0.1-1.5 mm, the central line of the pressure measuring middle hole (6) is superposed with the central line of the ball socket, the pressure measuring lower hole (7), the pressure measuring upper hole (8), the pressure measuring right hole (9) and the pressure measuring, the central line of the pressure measuring ball socket is vertical to the side wall of the ball socket, and the angle formed by the central line of the pressure measuring central hole and the central line of the pressure measuring central hole is 20-80 degrees;
the convection heat exchange groove (3) is a rectangle with the same width, the centers of the grooves coincide, the widths of the grooves are 1-3 mm, the length of the groove parallel to the central line of a cylinder of the probe head (1) is 0.8-6 mm, the depth of the groove vertical to the central line reaches the position of the head of the temperature sensor (2), the diameter of a circular channel where the head of the temperature sensor (2) is located is 0.8-3.5 mm, the axial length of the circular channel is 1-7 mm, the axial line of the circular channel coincides with the axial line of a cable leading-out channel (5) of the temperature sensor, the central axis of the cable leading-out channel (5) of the temperature sensor is 0.5-3 mm away from the central line of the cylinder, the central line of the cable leading-out channel (5) of the temperature sensor, the central line of the cylinder and the central line of a pressure measuring hole (6) are on the same plane, the, the heat insulation sealing piece (4) and the temperature sensor (2) are installed and fixed on a circular channel firstly when the heat insulation sealing piece (4) and the temperature sensor (2) are installed, a temperature sensor cable (14) is led out of the tail of a probe supporting rod (12) through a temperature sensor cable leading-out channel (5) in a probe, then an opening on the end face of the probe head (1) is covered, welded and packaged, and the axis of a cylinder of the probe head (1) is coincided with the axis of a cylinder of the probe supporting rod (12).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020129971.7U CN211696880U (en) | 2020-01-20 | 2020-01-20 | Probe for measuring full parameters of subsonic three-dimensional steady-state flow field |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020129971.7U CN211696880U (en) | 2020-01-20 | 2020-01-20 | Probe for measuring full parameters of subsonic three-dimensional steady-state flow field |
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| CN202020129971.7U Active CN211696880U (en) | 2020-01-20 | 2020-01-20 | Probe for measuring full parameters of subsonic three-dimensional steady-state flow field |
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