CN213956724U - Kerr probe for increasing total pressure measurement angle through front edge slotting - Google Patents
Kerr probe for increasing total pressure measurement angle through front edge slotting Download PDFInfo
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- CN213956724U CN213956724U CN202121272922.XU CN202121272922U CN213956724U CN 213956724 U CN213956724 U CN 213956724U CN 202121272922 U CN202121272922 U CN 202121272922U CN 213956724 U CN213956724 U CN 213956724U
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Abstract
The utility model provides a kerr probe for increasing total pressure measurement angle through front edge slotting, which comprises a probe body and an air catching port arranged at the air inlet end of the probe body, wherein the section diameter of the air catching port is gradually reduced from the air inlet end to the air outlet end, an air cavity is arranged in the probe body, the air inlet end of the air cavity is communicated with the air outlet end of the air catching port, a conduit is arranged in the air cavity, the conduit is connected with the probe body, a pressure stabilizing structure is also arranged on the probe body, and the pressure stabilizing structure is communicated with the air cavity; the air inlet seam has been seted up on its circular arc curved surface to the probe body, the air inlet seam is linked together with the air cavity, the utility model discloses simple reliable through setting up air inlet seam and steady voltage structure, can guarantee that the air current is stable unblocked, reinforcing means measuring stability under great incoming flow angle, the critical angle of enlarging device measuring realizes the measurement of total pressure to the air current of incoming flow direction more angle, improves the measuring degree of accuracy of this device.
Description
Technical Field
The utility model relates to a flow field measuring equipment technical field especially relates to a seam through the leading edge and increase total pressure measurement angle's kirl probe.
Background
Before key equipment such as a gas compressor, an aerospace vehicle, a gas turbine and the like is used, the pneumatic design of the equipment needs to be checked, and the pneumatic design needs a large amount of pneumatic tests and data for verification and support. The prior dynamic pneumatic probe system mainly comprises a dynamic pressure sensor, a probe, a support rod, a signal amplifier and a dynamic data acquisition system, wherein the Kerr probe is a commonly used dynamic pressure measurement probe. The flow field used in the test usually adopts an unsteady flow field, and the airflow in different incoming flow directions in the flow field needs to be measured, while the existing probe can only measure the airflow in a single incoming flow direction when in use, has a small measurement angle range of the airflow, and the airflow arranged in the flow field has large interference on the airflow at the periphery of the flow field, so that the measurement accuracy can be reduced when the total pressure measurement of a large incoming flow included angle is carried out in a wind tunnel, a water tunnel or the nature (such as aircraft wake measurement and wind power plant natural wind measurement), thereby further reducing the quality of the pneumatic test and influencing the test effect of the whole test.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main objective is to solve the problem that exists among the prior art, provides a seam through the leading edge and increases the kirl probe of always pressing the measurement angle.
In order to solve the technical problem, the utility model discloses a technical scheme is: a Kerr probe for increasing the total pressure measurement angle through a front edge slit comprises a probe body and an air catching port arranged at the air inlet end of the probe body, wherein the section diameter of the air catching port is gradually reduced from the air inlet end to the air outlet end of the air catching port, an air cavity is formed in the probe body, the air inlet end of the air cavity is communicated with the air outlet end of the air catching port, a guide pipe is arranged in the air cavity and connected with the probe body, a pressure stabilizing structure is further arranged on the probe body, and the pressure stabilizing structure is communicated with the air cavity;
the probe body is provided with an air inlet seam along the arc curved surface of the probe body, and the air inlet seam is communicated with the air cavity.
Further, the air inlet slits are arranged in a group.
Further, the section diameter of the air inlet end of the air catching port is the same as that of the probe body.
Furthermore, the air inlet seams are arranged in a plurality of groups along the central axis direction of the probe body.
Furthermore, the cross section of the air inlet seam, which coincides with the central axis of the probe body, is in the shape of an airfoil.
Further, the inner diameter of the conduit is set to be in the range of 0.3-1.0mm, and the thickness of the wall of the conduit is set to be in the range of 0.2-0.5 mm.
Further, a preferred value of the inner diameter of the conduit is set to 0.8mm and a preferred value of the thickness of the conduit wall of the ventilation conduit is set to 0.4 mm.
Further, the pressure stabilizing structures are arranged into a group and used for balancing the internal pressure and the external pressure of the probe body or reducing the axial pressure gradient.
Furthermore, the pressure stabilizing structures are arranged into a plurality of groups, the plurality of groups of air pressure stabilizing structures are uniformly arranged on the arc curved surface of the probe body, and the plurality of groups of pressure stabilizing structures are used for balancing the internal pressure and the external pressure of the probe body or reducing the axial pressure gradient.
Further, the pressure stabilizing structure is provided as a vent.
Further, the diameter range of the vent hole is set to be 1.0-2.0 mm.
Further, a preferable value of the vent hole diameter is set to 1.5 mm.
Further, be provided with connecting portion in the air inlet seam, connecting portion set up to one set or multiunit.
Further, the connecting part and the probe body are integrally formed.
Furthermore, the air outlet end of the probe body is provided with an assembly hole, and the air inlet end of the assembly hole is communicated with the end part of the guide pipe.
Further, the end of the catheter is provided with a sensor, which is located in the air cavity.
The utility model has the advantages and positive effects that: the utility model discloses simple structure, reliable and stable, when measuring to the flow field, the air current in the flow field can flow to the kirl probe and act on the probe body, through seting up the air inlet seam on the probe body, can make the peripheral air current that acts on the probe body enter into the air cavity along the air inlet seam, and discharge via the steady voltage structure that is linked together with the air cavity body, thereby reduce the probe body to its interference in peripheral flow field, and guarantee the stable circulation of peripheral air current; and the section diameter of the gas trapping port that the inlet end of kirl probe was seted up reduces from its inlet end to the end of giving vent to anger gradually, can effectually enlarge the measuring range of this device, makes it can be fit for measuring the air current of different incoming flow directions to guarantee that the air current can act on the sensor that the pipe end portion set up after entering into the probe body, improve device data acquisition's accuracy, and then improve device's measurement accuracy, guarantee whole experimental test quality.
Drawings
FIG. 1 is a schematic sectional view of a Kill probe in example 1;
FIG. 2 is a schematic sectional view of a Kill probe in example 3;
FIG. 3 is a schematic perspective view of a kirl probe in example 3;
FIG. 4 is a schematic sectional view of a Kill probe in example 4;
FIG. 5 is a graph comparing the flow rate of a Kerr probe within a flow field;
FIG. 6 is a graph of total pressure of a kirl probe in a flow field.
In the figure: the probe comprises a probe body 1, an air catching port 2, an air cavity 3, a guide pipe 4, a pressure stabilizing structure 5, an air inlet seam 6, a connecting part 7 and an assembling hole 8.
Detailed Description
For a better understanding of the present invention, the following further description is given in conjunction with the following embodiments and accompanying drawings.
Example 1:
as shown in figure 1, the Keel probe for increasing the total pressure measurement angle through the front edge slot comprises a probe body 1 and an air catching port 2 arranged at the air inlet end of the probe body 1, the section diameter of the air catching port 2 is gradually reduced from the air inlet end to the air outlet end, an air cavity 3 is arranged inside the probe body 1, the air inlet end of the air cavity 3 is communicated with the air outlet end of the air catching port 2, a guide pipe 4 is arranged inside the air cavity 3, the guide pipe 4 is connected with the probe body 1, a pressure stabilizing structure 5 is further arranged on the probe body 1, the pressure stabilizing structure 5 is communicated with the air cavity 3, the air flow in the flow field enters the air cavity 3 through the air catching port 2 arranged on the probe body 1, the air flow in the flow field acts on the end part of the guide pipe 4, a sensor is arranged at the end part of the guide pipe 4, the flow velocity and the pressure entering the air cavity 3 are measured by the sensor, and meanwhile, the redundant air flow can enter the air cavity 3 through the air catching port 2, the probe body 1 is discharged to the outside of the probe body 1 through a pressure stabilizing structure 5 communicated with the air cavity 3, the air flow can be stably circulated, the cross sectional area of the air catching port 2 of the probe body 1 is gradually reduced from the air inlet end to the air outlet end of the probe body 1, the probe body can be suitable for measuring the air flow in different incoming flow directions, the measuring angle and the measuring range of the device are enlarged, the state of the air flow entering the air cavity 3 is closer to the air flow in the flow field, and the accuracy of pressure measurement in the flow field is improved.
Further, the inner diameter of the guide tube 4 is set to a range of 0.3 to 1.0mm, and the thickness of the wall of the guide tube 4 is set to a range of 0.2 to 0.5mm, a preferable value of the inner diameter of the guide tube 4 is set to 0.8mm, and the optimal value of the pipe wall thickness of this pipe 4 sets up to 0.4mm, utilize pipe 4 will detect the sensor of total pressure usefulness and install and fix, prevent that the air current from entering into probe body 1 and making the sensor take place to rock, influence the measuring effect to the air current, make its pressure and the speed of the air current that can better measurement entering probe body 1, pilot hole 8 has been seted up to the end of giving vent to anger of probe body 1, the inlet end of pilot hole 8 is linked together with the tip of pipe 4, the tip of pipe 4 is provided with the sensor, the sensor is located air cavity 3, utilize the sensor to measure the air current in the flow field, utilize pilot hole 8 to install probe body 1.
Example 2
Compared with the embodiment 1, the probe body 1 is provided with the air inlet slits 6 along the arc curved surface, the air inlet slits 6 are communicated with the air cavity 3, and the air inlet slits 6 are arranged in a group, so that compared with the embodiment 1, the air inlet slits 6 are arranged on the arc curved surface of the probe body 1, air flow in a flow field can enter the probe body 1 along the air inlet slits 6 and is discharged by the pressure stabilizing structure 5 arranged on the probe body 1, the interference of the probe body 1 on the flow field around the probe body is reduced, and the accuracy of the device for measuring the flow field is improved; meanwhile, the size and shape of the air inlet slit 6 can be determined according to actual use requirements and application places, so that the circulation of air flow inside and outside the probe body 1 is ensured.
Example 3
As shown in fig. 2 and fig. 3, the difference between this embodiment and embodiment 2 is that, further, the diameter of the cross section of the air inlet of the air catching port 2 is the same as that of the probe body 1, and compared with the foregoing embodiment, the device can measure the air flows in different incoming flow directions, and simultaneously, the air inlet slit 6 is conveniently arranged on the probe body 1, so that the probe body 1 is easily processed and manufactured, the manufacturing difficulty of the product is reduced, the air catching port 2 is also conveniently processed, and the practicability of the device is improved.
Example 4
As shown in fig. 4, the present embodiment is different from embodiment 3 in that, further, the air inlet slits 6 are arranged in multiple groups along the central axis direction of the probe body 1, and compared with the foregoing embodiments, the air flow around the probe body 1 can enter the air cavity 3 through the air inlet slits 6 arranged at different positions on the probe body 1, so that the stability of the flow field around the probe body 1 can be better maintained, the air flow around the flow field is more stable, the interference of the probe body 1 on the surrounding flow field is greatly reduced, and the accuracy of the probe measurement is improved.
Example 5
The present embodiment is different from embodiments 2 to 4 in that, further, the cross section of the air inlet slit 6 coinciding with the central axis of the probe body 1 is configured as an airfoil, and compared with the previous embodiments, by configuring the air inlet slit 6 as an airfoil, the air flow can flow into the air cavity 3 along the air inlet slit 6 of the airfoil, and the inner wall of the airfoil air inlet slit 6 has a smaller acting force on the air flow, so that the air flow is more uniform.
Example 6
The difference between this embodiment and embodiments 2-5 is that, furthermore, the pressure stabilizing structures 5 are arranged in multiple groups, the multiple groups of air pressure stabilizing structures 5 are uniformly arranged on the arc curved surface of the probe body, and the pressure stabilizing structures are used for balancing the internal and external pressures of the probe body 1 or reducing the axial pressure gradient, so as to keep the stable circulation of the air pressure in the air cavity 3 and the air pressure in the flow field, and reduce the interference to the surrounding flow field.
Example 7
The difference between this embodiment and embodiments 2-6 is that the pressure stabilizing structure 5 is provided as a vent, the diameter range of the vent is set to 1.0-2.0mm, and the preferred value of the diameter of the pressure stabilizing structure 5 is set to 1.5mm, compared with the previous embodiments, the pressure stabilizing structure 5 is provided as a vent, which is convenient for processing and manufacturing the device, reduces the cost, and ensures the stable circulation of the inner and outer air flows of the probe body 1 by exhausting the vent arranged on the arc curved surface of the probe body 1 after entering the air cavity 3 formed in the probe body 1.
Example 8
The present embodiment is different from embodiments 2 to 7 in that a connecting portion 7 is provided in the air inlet slit 6, the connecting portions 7 are provided in one or more groups, and the connecting portions 7 and the probe body 1 are integrally formed, and compared with the foregoing embodiments, by providing the connecting portions 7 in the air inlet slit 6, the portion of the air inlet slit 6 can be reinforced, and the occurrence of fracture or damage of the slotted probe body 1 is avoided.
First, a comparative model was constructed for example 1 and example 3
A comparative test is constructed for the kirl probes in the two groups of the example 1 and the example 3, the inner diameter of the conduit 4 in each group of the kirl probes is set to be 0.8mm, the wall thickness of the conduit 4 is set to be 0.4mm, the diameter of the pressure stabilizing structure 5 is set to be 1.5mm, and the specific structure is shown in fig. 1 and fig. 2;
second, comparative testing of the kirl probes of examples 1 and 3 with respect to the flow rate of the gas stream in the flow field:
a. the test conditions are as follows:
the test environment of the test is set in a flow field with uniform airflow, the included angle between the incoming flow direction of the airflow in the flow field and the central axis of the air trapping port 2 is 60 degrees, the flow velocity of the airflow in the flow field is 30m/s, and the test carriers are set in the same test model.
b. Procedure of the test
The test model provided with the two groups of Kerr probes is respectively placed in a simulation flow field, the airflow in the flow field is controlled to obliquely flow into an air cavity 3 in the probe body 1 from an air capture port 2 and an air inlet slit 6 at 30m/s, and flows out through a pressure stabilizing structure 5 communicated with the air cavity 3.
c. Conclusion of the experiment
As shown in fig. 5, after the above test conditions and test process, the air flow at the central portion of the air inlet end of the probe body 1 in example 1 is about 30m/s, the flow velocity at the portion close to the inner wall of the air catching port 2 is about 24-30m/s, and the flow velocity is about 24-30m/s, which is a large area, and it is illustrated that the air catching port 2 in example 1 has a large influence on the flow velocity of the air flow entering the air cavity 3, so that the difference between the error of the measurement result and the actual flow velocity is large; the flow velocity of the air flow outside the air inlet end of the probe body 1 is about 16-24m/s, and the area of the disturbed area is large, which indicates that the probe body 1 in the embodiment 1 has strong disturbance to the surrounding flow field;
as shown in fig. 5, after the above test conditions and test processes, the air flow at the central portion of the air inlet end of the probe body 1 in example 3 is about 30m/s, the flow velocity at the portion close to the inner wall of the air catching port 2 is about 24-30m/s, and the area of the flow velocity about 24-30m/s is smaller than that in example 1, which indicates that the air catching port 2 in example 3 has less influence on the flow velocity of the air entering the air cavity 3 than in example 1, so that the difference between the measurement result error and the actual flow velocity is smaller, and the measurement result is more accurate; the flow velocity of the gas flow outside the gas inlet end of the probe body 1 is about 16-24m/s, and the disturbed area is smaller than that of the embodiment 1, which shows that the probe body 1 in the embodiment 3 has less disturbance to the surrounding flow field.
Third, comparative testing of the total pressure of the kirl probe in example 1 and example 3 in the flow field:
a. the test conditions are as follows:
the test environment of the test is set in a flow field with uniform airflow, the included angle between the incoming flow direction of the airflow in the flow field and the central axis of the air capture port 2 is 60 degrees, the actual pressure in the flow field is set to be 544Pa, the pressure in the flow field in the state is designated as the total pressure of the flow field, and the test carrier is set to be the same test model.
b. Procedure of the test
The test model provided with the two groups of Kerr probes is respectively placed in a simulation flow field, and the airflow in the control flow field obliquely flows into an air cavity 3 in the probe body 1 through the air capture port 2 and the air inlet slit 6 and flows out through a pressure stabilizing structure 5 communicated with the air cavity 3.
c. Conclusion of the experiment
As shown in fig. 6, after the above test conditions and test procedures, the total pressure in the inflow direction of the inlet end of the probe body 1 in example 1 is about 544pa, a total pressure region having a total pressure of about 541.2pa is formed inside the air trap 2 close to the inflow direction, and the total pressure region is large, and it can be seen that the error of the measurement of the total pressure in the flow field by the air trap 2 is large; the total pressure formed outside the air trapping port 2 far away from the incoming flow direction and the total pressure formed inside the air cavity 3 are both about 539pa, which shows that the probe body 1 in the embodiment 1 has small interference on the total pressure of the peripheral flow field and the airflow is stable;
as shown in fig. 6, after the above test conditions and test procedures, the total pressure in the inflow direction of the inlet end of the probe body 1 in example 3 is about 544pa, a total pressure region having a total pressure of about 541.2pa is formed inside the trap 2 near the inflow direction, and the total pressure region is smaller than that in example 1, and it can be seen that the error of the measurement of the total pressure in the flow field by the trap 2 is smaller than that in example 1; and the total pressure formed outside the air trapping port 2 far from the incoming flow direction and the total pressure formed in the air cavity 3 are both about 539pa, which shows that the probe body 1 in embodiment 3 has less interference on the total pressure of the peripheral flow field and the airflow is stable.
In summary, as shown in fig. 5 and fig. 6, the following conclusions can be drawn by comparing the flow rate and total pressure of the gas flow in the flow field for the example 1 and the example 3:
1. when the embodiment 1 and the embodiment 3 are in the flow field with the same flow rate, the flow rate of the air flow at the air inlet end of the probe body 1 in the embodiment 3 is closest to the flow rate of the air flow in the flow field, and the area of the air flow near the air inlet end of the probe body 1 subjected to disturbance is smaller, which shows that the kirl probe in the embodiment 3 has more accurate measurement result of the air flow rate and more stable peripheral air flow rate;
2. when the embodiment 1 and the embodiment 3 are in the flow field with the same total pressure, the total pressure in the gas catching port 2 in the embodiment 3 is the closest to the total pressure in the flow field, and the pressure-disturbed area near the gas inlet end of the probe body 1 is the smallest, which indicates that the kirr probe in the embodiment 3 has higher measurement precision on the total pressure of the gas flow and more stable total pressure in the peripheral flow field;
3. when the embodiment 1 and the embodiment 3 are in a flow field with the same total pressure, the total pressure formed outside the air trapping port 2 far away from the incoming flow direction is the same as the total pressure formed inside the air cavity 3, which shows that the pressure stabilizing mechanism 5 is arranged, so that the stability of the total pressure inside and outside the probe body 1 can be ensured, and the total pressure interference of the probe body on the peripheral flow field is reduced;
in addition, the connection mode between the sensor and the catheter 4 can adopt the gluing and embedding modes for connection, and the working principle and the specific structure of the sensor both belong to the prior art in the technical field, so that the details are not repeated.
The utility model discloses simple structure, it is reliable and stable, when measuring the flow field, the air current in the flow field can flow to the kirl probe and act on probe body 1, through seting up air inlet joint 6 on probe body 1, can make the peripheral air current that acts on probe body 1 enter air cavity 3 along air inlet joint 6 and in, and discharge via the steady voltage structure 5 that is linked together with air cavity 3 body, thus reduce the interference of probe body 1 to its peripheral flow field, and guarantee the stable circulation of peripheral air current; and the cross-sectional diameter of the gas catching port 2 that the inlet end of kirl probe was seted up reduces from its 1 inlet end to the end of giving vent to anger gradually, can effectually enlarge the measuring range of this device, make it can be fit for measuring the air current of different incoming flow directions, and guarantee that the air current can act on the sensor that 4 tip of pipe set up after entering into probe body 1, improve device data acquisition's accuracy, and then improve device's measurement accuracy, guarantee whole experimental test quality, embodiment 9 has been the example, the utility model discloses a concrete working process is as follows:
a user installs the Kerr probe on a device to be detected through the assembly hole 8, the device is placed in a flow field, airflow in the flow field acts on the probe body 1 from an incoming flow direction, an air capture port 2 formed in an air inlet end of the probe body 1 and an airfoil-shaped air inlet slit 6 formed in an arc curved surface of the air capture port enter the probe body 1, the airflow entering through the air capture port 2 acts on a sensor installed at the end of the guide pipe 4, the flow rate and total pressure in the flow field are collected by the sensor and fed back to a corresponding measuring system, so that the flow rate and total pressure of the airflow in the flow field are measured, and redundant airflow and the airflow entering through the air inlet slit 6 enter the air cavity 3 and are discharged out of the device through a vent hole communicated with the air cavity 3, and the stability of the flow rate and the total pressure of the airflow around the probe body 1 is guaranteed.
The embodiments of the present invention have been described in detail, but the present invention is only the preferred embodiments of the present invention, and the present invention is not to be considered as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention should be covered by the present patent.
Claims (10)
1. The utility model provides a seam through leading edge and increase basic mole probe of pressure measurement angle, includes probe body (1) and sets up in gas capture mouth (2) of probe body (1) inlet end, its characterized in that: the section diameter of the gas catching port (2) is gradually reduced from the gas inlet end to the gas outlet end, a gas cavity (3) is formed in the probe body (1), the gas inlet end of the gas cavity (3) is communicated with the gas outlet end of the gas catching port (2), a guide pipe (4) is arranged in the gas cavity (3), the guide pipe (4) is connected with the probe body (1), a pressure stabilizing structure (5) is further arranged on the probe body (1), and the pressure stabilizing structure (5) is communicated with the gas cavity (3);
the probe body (1) is provided with an air inlet seam (6) along the arc curved surface, and the air inlet seam (6) is communicated with the air cavity (3).
2. The kirl probe for increasing the total pressure measurement angle through leading edge slotting as claimed in claim 1, wherein: the diameter of the section of the air inlet end of the air catching port (2) is the same as that of the section of the probe body (1).
3. A kirl probe for increasing total pressure measurement angle by leading edge slitting as claimed in any one of claims 1 or 2, wherein: the air inlet seams (6) are arranged into one or more groups along the central axis direction of the probe body (1).
4. A kirl probe for increasing total pressure measurement angle by leading edge slitting as claimed in claim 3, wherein: the cross section of the air inlet seam (6) and the coincidence of the central axis of the probe body (1) is in the shape of an airfoil.
5. The kirl probe for increasing the total pressure measurement angle through leading edge slotting as claimed in claim 1, wherein: the inner diameter of the conduit (4) is set in the range of 0.3-1.0mm, and the wall thickness of the conduit (4) is set in the range of 0.2-0.5 mm.
6. The kirl probe for increasing the total pressure measurement angle through leading edge slotting as claimed in claim 1, wherein: the pressure stabilizing structure (5) is set to be one group or a plurality of groups, the pressure stabilizing structure (5) is uniformly arranged on the arc curved surface of the probe body (1), and the pressure stabilizing structure (5) is used for balancing the internal pressure and the external pressure of the probe body (1) or reducing the axial pressure gradient.
7. A Kerr probe for increasing total pressure measurement angle through leading edge slitting as claimed in any one of claims 1 or 6, wherein: the pressure stabilizing structure (5) is provided with vent holes, and the diameter range of the vent holes is set to be 1.0-2.0 mm.
8. The kirl probe for increasing the total pressure measurement angle through leading edge slotting as claimed in claim 1, wherein: a connecting part (7) is arranged in the air inlet seam (6), and the connecting part (7) is set into one or more groups.
9. The kirl probe for increasing total pressure measurement angle through leading edge slitting as claimed in claim 8, wherein: and the connecting part (7) and the probe body (1) are integrally formed.
10. The kirl probe for increasing the total pressure measurement angle through leading edge slotting as claimed in claim 1, wherein: the probe is characterized in that an assembly hole (8) is formed in the air outlet end of the probe body (1), and the air inlet end of the assembly hole (8) is communicated with the end part of the guide pipe (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121272922.XU CN213956724U (en) | 2021-06-08 | 2021-06-08 | Kerr probe for increasing total pressure measurement angle through front edge slotting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121272922.XU CN213956724U (en) | 2021-06-08 | 2021-06-08 | Kerr probe for increasing total pressure measurement angle through front edge slotting |
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| Publication Number | Publication Date |
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| CN213956724U true CN213956724U (en) | 2021-08-13 |
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| CN202121272922.XU Active CN213956724U (en) | 2021-06-08 | 2021-06-08 | Kerr probe for increasing total pressure measurement angle through front edge slotting |
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| Country | Link |
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| CN (1) | CN213956724U (en) |
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2021
- 2021-06-08 CN CN202121272922.XU patent/CN213956724U/en active Active
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