CN106871968B - Probe for measuring total pressure of total temperature of multiple points of subsonic flow field - Google Patents
Probe for measuring total pressure of total temperature of multiple points of subsonic flow field Download PDFInfo
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- CN106871968B CN106871968B CN201710201090.4A CN201710201090A CN106871968B CN 106871968 B CN106871968 B CN 106871968B CN 201710201090 A CN201710201090 A CN 201710201090A CN 106871968 B CN106871968 B CN 106871968B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
Abstract
The invention belongs to the technical field of turbine test and test, and discloses a probe for measuring total pressure of multiple points of subsonic flow fields, which comprises a probe supporting rod 1, a probe head 2, a transition section 3, a pressure-inducing tube 4 and a temperature sensor cable 5, wherein the probe supporting rod 1 and the probe head 2 are both cylindrical, the probe head 2 is connected to the probe supporting rod 1 through the transition section 3, the front end of the cylindrical surface of the probe head 2 is provided with eight pressure-inducing holes comprising five pressure-inducing holes and three temperature-inducing holes, the five pressure-inducing holes are respectively communicated with five pressure-inducing tubes packaged in the probe head 2, the three temperature-inducing holes are respectively communicated with a temperature sensor, and the pressure-inducing tube and the temperature sensor cable lead out of the tail of the probe through a channel in the probe supporting rod 1. Compared with the existing probe, the invention can simultaneously measure the flow velocity and the flow direction of one position point in the flow field and the total temperature and the total pressure of a plurality of position points through calibration and calibration, and is suitable for testing the flow fields of an inlet and an outlet of a subsonic fan, a gas compressor, a pump, a fan and the like and interstage.
Description
Technical Field
The invention belongs to the field of testing of impeller mechanical tests, and relates to an eight-hole probe for measuring total pressure of multipoint total temperature in a subsonic flow field.
Background
At present, in the field of impeller machinery, in particular in the field of flow field testing of aircraft engines, pressure probes and temperature probes are widely used for pressure and temperature measurement. The use of a pressure probe enables measurements of total pressure, static pressure, mach number, flow direction. The pressure probe cannot measure the temperature, so that the flow velocity of the flow field cannot be calculated through data measured by the pressure probe. Currently, a single total temperature probe is usually adopted for measuring the temperature of the incoming flow, and the total temperature probe can measure the total temperature of the incoming flow.
In the existing probe testing technology, for a flow field which needs to measure temperature and pressure at the same time, the existing probe testing means can only respectively use a pressure probe and a temperature probe to measure. This method is complicated, costly and may introduce additional errors. The invention provides a subsonic flow field multipoint total temperature and total pressure eight-hole probe, which can be used for simultaneously measuring pressure and temperature by using a single probe and simultaneously measuring flow parameters such as total temperature, total pressure, flow velocity, flow direction and the like of a plurality of position points in a flow field. The calibration can realize accurate measurement and can be applied to testing of impeller mechanical tests.
Disclosure of Invention
The invention mainly solves the technical problems that: aiming at the problems that in the existing turbine test, a temperature probe and a pressure probe are always used separately and independently, the test time is long, the cost is high, the operation is complex and the like, the invention provides the subsonic flow field multipoint total temperature and pressure eight-hole probe, the pressure and temperature can be measured simultaneously by using a single probe, and the flow parameters such as the total temperature, the total pressure, the flow speed, the flow direction and the like of a plurality of position points in the flow field can be measured simultaneously.
In order to solve the technical problems, the invention adopts the technical scheme that:
the eight-hole probe for measuring total pressure of multipoint total temperature of a subsonic flow field is characterized by comprising a probe supporting rod (1), a probe head (2), a transition section (3), a pressure introduction pipe (4) and a temperature sensor cable (5), wherein the probe supporting rod (1) and the probe head (2) are both cylindrical, and the probe head (2) is connected to the probe supporting rod (1) through the transition section (3); the front end of the cylindrical surface of the probe head part (2) is provided with eight sensing holes, namely a pressure sensing hole 1(6), a temperature sensing hole 1(7), a pressure sensing hole 2(8), a pressure sensing hole 3(9), a pressure sensing hole 4(10), a temperature sensing hole 2(11), a pressure sensing hole 5(12) and a temperature sensing hole 3(13), wherein the central lines of the eight sensing holes are parallel to and vertical to the central line of the cylinder of the probe head part (2); five pressure sensing holes are respectively communicated with five pressure leading pipes encapsulated in the head part (2) of the probe, three temperature sensing holes are respectively communicated with a temperature sensor, and the pressure leading pipes (4) and a temperature sensor cable (5) are led out of the tail part of the probe through a channel in the probe supporting rod (1).
Furthermore, the pressure sensing holes 1(6) and the pressure sensing holes 5(12) are circular holes and have the same size; the temperature sensing holes 1(7), the temperature sensing holes 2(11) and the temperature sensing holes 3(13) are the same, are circular holes and have the same size, and a temperature sensor is arranged in each hole; the pressure sensing holes 2(8), 3(9) and 4(10) are sensing holes different from each other, and the centers of the three holes are located in the same plane and parallel to the bottom surface of the column body.
Furthermore, the pressure sensing holes 2(8) and the pressure sensing holes 4(10) are symmetrically distributed along the planes where the center lines of the pressure sensing holes 3(9) and the center lines of the columns are located, the diameters of the pressure sensing holes are the same and are all 0.2-2 mm, and the included angle between the pressure sensing holes 2(8) and the center lines of the pressure sensing holes 4(10) is 60-100 degrees.
Furthermore, the geometric and size of the temperature sensing holes 1(7), 2(11) and 3(13) are the same, the diameter is 0.5-3 mm, the distance between the pressure sensing holes 1(6) and 1(7) and the center between the pressure sensing holes 5(12) and 3(13) is 1.1-2 times of the hole diameter.
Furthermore, the probe supporting rod (1) is of a cylindrical structure and plays a role in supporting, a channel is formed in the probe supporting rod (1), and the pressure guiding pipe (4) and the temperature sensor cable (5) are led out of the tail portion of the probe through the channel in the probe supporting rod (1).
Further, the temperature sensor may be a thermocouple or a thermal resistor.
The invention has the beneficial effects that:
the subsonic flow field multipoint total temperature and total pressure eight-hole probe can simultaneously measure the total temperature, the total pressure, the flow velocity and the flow direction through a single probe; the flow field parameters of a plurality of position points can be obtained by using a single probe, and the flow conditions of the plurality of position points can be truly reflected; the number of probes used can be reduced, so that the interference on the flow field caused by excessive number of probes can be weakened; meanwhile, the use number of the probes is reduced, the cost of the test can be reduced, the complexity of the test is reduced, and the test operation is easier to perform in the test process.
Drawings
FIG. 1 is a schematic diagram of a subsonic flow field multi-point total temperature and total pressure eight-hole probe of the present invention.
Fig. 2 is a top view of fig. 1.
Wherein: 1-probe supporting rod, 2-probe head, 3-transition section, 4-pressure guiding pipe, 5-temperature sensor cable, 6-pressure sensing hole 1, 7-temperature sensing hole 1, 8-pressure sensing hole 2, 9-pressure sensing hole 3, 10-pressure sensing hole 4, 11-temperature sensing hole 2, 12-pressure sensing hole 5, 13-temperature sensing hole 3.
Detailed Description
The subsonic flow field multipoint total temperature and total pressure eight-hole probe of the present invention is described in detail below by way of examples, and with reference to the attached drawings, so that the features and advantages of the present invention can be more easily understood by those skilled in the art, and thus the protection scope of the present invention can be more clearly and clearly defined.
As shown in fig. 1, in the embodiment, a subsonic flow field multipoint total temperature and pressure probe with eight holes is described, which includes a probe supporting rod (1), a probe head (2), a transition section (3), pressure tubes (4) and a temperature sensor cable (5), where the probe supporting rod (1) and the probe head (2) are both cylindrical, the probe head (2) is connected to the probe supporting rod (1) through the transition section (3), eight pressure sensing holes are formed in the front end of the cylindrical surface of the probe head (2), and include five pressure sensing holes and three temperature sensing holes, the five pressure sensing holes are respectively communicated with five pressure tubes packaged in the probe head (2), the three temperature sensing holes are respectively communicated with the temperature sensor, and the pressure tubes and the temperature sensor cable are led out of a probe tail through a channel in the probe supporting rod (1). Of the five pressure sensing holes, the pressure sensing holes 1(6), the pressure sensing holes 3(9) and the hole pressure sensing holes 5(12) are total pressure measuring holes which can measure the total pressure of the incoming flow, and the pressure sensing holes 2(8), the pressure sensing holes 3(9) and the pressure sensing holes 4(10) are combined to measure the Mach number and the flow direction of the two-dimensional flow field. The five pressure sensing holes are respectively communicated with five pressure leading pipes packaged in the head of the probe. Temperature sensors are arranged in the three temperature sensing holes, and the multipoint total temperature can be measured. The pressure guiding pipe and the temperature sensor cable are led out of the tail part of the probe through the inner channel of the probe supporting rod.
As shown in the attached drawing 1, the subsonic flow field multipoint total temperature and total pressure eight-hole probe is explored into a flow field to be tested, the pressure sensing holes 3(9) face to the incoming flow direction, and the central line of the probe support rod is perpendicular to the incoming flow direction. The pressure sensing holes 1(6), 3(9) and 5(12) of the probe head can measure the total pressure of incoming flow at a plurality of positions, and the pressure sensing holes 2(8), 3(9) and 4(10) can measure the Mach number and the flow direction of the incoming flow. The temperature sensing holes 1(7), 2(11) and 3(13) can measure the total temperature of a plurality of position points.
Claims (1)
1. The eight-hole probe for measuring total pressure of multipoint total temperature of a subsonic flow field is characterized by comprising a probe supporting rod (1), a probe head (2), a transition section (3), a pressure introduction pipe (4) and a temperature sensor cable (5), wherein the probe supporting rod (1) and the probe head (2) are both cylindrical, and the probe head (2) is connected to the probe supporting rod (1) through the transition section (3); the front end of the cylindrical surface of the probe head part (2) is provided with eight sensing holes, namely a pressure sensing hole 1(6), a temperature sensing hole 1(7), a pressure sensing hole 2(8), a pressure sensing hole 3(9), a pressure sensing hole 4(10), a temperature sensing hole 2(11), a pressure sensing hole 5(12) and a temperature sensing hole 3(13), wherein the central lines of the eight sensing holes are parallel to and vertical to the central line of the cylinder of the probe head part (2); the five pressure sensing holes are respectively communicated with five pressure leading pipes encapsulated in the head part (2) of the probe, the three temperature sensing holes are respectively communicated with a temperature sensor, and the pressure leading pipes (4) and a temperature sensor cable (5) are led out of the tail part of the probe through an inner channel of the probe supporting rod (1);
the pressure sensing holes 1(6) and the pressure sensing holes 5(12) are circular holes and have the same size; the temperature sensing holes 1(7), the temperature sensing holes 2(11) and the temperature sensing holes 3(13) are the same, are circular holes and have the same size, and a temperature sensor is arranged in each hole; the pressure sensing holes 2(8), the pressure sensing holes 3(9) and the pressure sensing holes 4(10) are sensing holes which are different from each other, and the centers of the three holes are positioned in the same plane and are parallel to the bottom surface of the column body;
the pressure sensing holes 2(8) and the pressure sensing holes 4(10) are symmetrically distributed along the planes where the center lines of the pressure sensing holes 3(9) and the center line of the column body are located, the diameters of the pressure sensing holes are the same and are all 0.2-2 mm, and the included angle between the center lines of the pressure sensing holes 2(8) and the pressure sensing holes 4(10) is 60-100 degrees;
the temperature sensing holes 1(7), the temperature sensing holes 2(11) and the temperature sensing holes 3(13) have the same geometry and size, the diameter is 0.5-3 mm, the distance between the pressure sensing holes 1(6) and the temperature sensing holes 1(7) and the distance between the centers of the pressure sensing holes 5(12) and the temperature sensing holes 3(13) is 1.1-2 times of the hole diameter;
the probe supporting rod (1) is of a cylindrical structure and plays a role in supporting, a channel is formed in the probe supporting rod (1), and the pressure guiding pipe (4) and the temperature sensor cable (5) are led out of the tail part of the probe through the channel in the probe supporting rod (1);
the temperature sensor is a thermocouple or a thermal resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710201090.4A CN106871968B (en) | 2017-03-30 | 2017-03-30 | Probe for measuring total pressure of total temperature of multiple points of subsonic flow field |
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| CN201710201090.4A CN106871968B (en) | 2017-03-30 | 2017-03-30 | Probe for measuring total pressure of total temperature of multiple points of subsonic flow field |
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| CN106871968A CN106871968A (en) | 2017-06-20 |
| CN106871968B true CN106871968B (en) | 2020-07-03 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107907232A (en) * | 2017-12-21 | 2018-04-13 | 沈阳鼓风机集团股份有限公司 | For measuring the temperature pressure combinations probe of turbomachinery interior flow field |
| CN111220348A (en) * | 2020-03-06 | 2020-06-02 | 上海海事大学 | Compound five-hole pressure-temperature probe |
Citations (5)
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|---|---|---|---|---|
| WO1994020014A1 (en) * | 1993-03-05 | 1994-09-15 | Sahagen Armen N | Probe for monitoring a fluid medium |
| DE4337402A1 (en) * | 1993-10-26 | 1995-04-27 | Mannesmann Ag | Probe for measuring pressure and temperature profiles |
| CN103884467A (en) * | 2014-04-14 | 2014-06-25 | 中国科学院工程热物理研究所 | Plasma pressure probe and system for measuring pressure by utilizing plasma pressure probe |
| CN104048808A (en) * | 2013-03-14 | 2014-09-17 | 中国科学院工程热物理研究所 | Dynamic entropy probe |
| CN106404409A (en) * | 2016-11-16 | 2017-02-15 | 中国科学院工程热物理研究所 | Probe assembly suitable for strong-shearing unsteady flow test of aeroengine |
-
2017
- 2017-03-30 CN CN201710201090.4A patent/CN106871968B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994020014A1 (en) * | 1993-03-05 | 1994-09-15 | Sahagen Armen N | Probe for monitoring a fluid medium |
| DE4337402A1 (en) * | 1993-10-26 | 1995-04-27 | Mannesmann Ag | Probe for measuring pressure and temperature profiles |
| CN104048808A (en) * | 2013-03-14 | 2014-09-17 | 中国科学院工程热物理研究所 | Dynamic entropy probe |
| CN103884467A (en) * | 2014-04-14 | 2014-06-25 | 中国科学院工程热物理研究所 | Plasma pressure probe and system for measuring pressure by utilizing plasma pressure probe |
| CN106404409A (en) * | 2016-11-16 | 2017-02-15 | 中国科学院工程热物理研究所 | Probe assembly suitable for strong-shearing unsteady flow test of aeroengine |
Non-Patent Citations (2)
| Title |
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| 基于数字信号处理功能实现的动态探针研制;姚君;《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》;20160215(第2期);正文第4-27页 * |
| 非定常流测量用薄膜热电阻温度探针的性能研究;彭建等;《航空动力学报》;19920731;第7卷(第3期);第248-252页 * |
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