CN107063696B - Five-hole pressure leaf-shaped probe - Google Patents
Five-hole pressure leaf-shaped probe Download PDFInfo
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- CN107063696B CN107063696B CN201710196175.8A CN201710196175A CN107063696B CN 107063696 B CN107063696 B CN 107063696B CN 201710196175 A CN201710196175 A CN 201710196175A CN 107063696 B CN107063696 B CN 107063696B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
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Abstract
The invention belongs to the technical field of aero-engine pressure testing, and discloses a five-hole pressure vane type probe, which comprises a probe, blades and pressure guiding pipes, wherein the probe is a cylinder with a round table head, the number of the probe is determined according to the measurement requirement, at least 3 probes are respectively fixed at different spreading measurement positions of the blades, the center and the side surface of the round table top surface of the probe are respectively provided with 1 and 4 pressure sensing holes, the 5 sensing holes are respectively communicated with 5 pressure guiding pipes encapsulated in the probe, and the pressure guiding pipes are fixed on the surface of the blades or in the blades and are led out from the root parts of the blades. The method can simultaneously measure the total pressure, the static pressure, the airflow angle and the Mach number of incoming flows at a plurality of spatial positions through calibration of the wind tunnel, and is suitable for measuring the distribution of incoming flow parameters of an interstage three-dimensional flow field of an aero-engine along the height direction of the blade. Compared with the common blade-shaped probe, the invention can measure more flow field parameters such as airflow angle, Mach number and the like, and also has the advantages of small influence of the blade-shaped probe on the measurement of the flow field, safe and reliable measurement and the like.
Description
Technical Field
The invention belongs to the technical field of pressure testing of aero-engines, relates to a three-dimensional flow field pressure measuring device, and particularly relates to a five-hole pressure blade-shaped probe which is suitable for measuring distribution of inflow flow angle, total pressure, static pressure and Mach number of an engine interstage along the height direction of a blade.
Compared with the existing four-hole pressure probe, the interstage three-dimensional flow field measurement can be instantly completed without a probe displacement mechanism and changing the position of a measuring point, so that the test cost is reduced; compared with the common total pressure blade type probe, the total pressure can be measured, and parameters such as an incoming flow airflow angle, static pressure, Mach number and the like can also be measured.
Background
The three-dimensional flow field parameters between stages, including incoming flow angle, total pressure, static pressure, Mach number and the like, are often required to be measured in an aircraft engine experiment, a porous pressure probe is generally adopted at present, the probe is driven to different blade height positions by a probe displacement mechanism to be respectively measured, due to single-point measurement, the multi-point measurement can be completed only by moving the probe, the experimental measurement time is long, and the experimental cost is high.
In some tests, the effective test time is short, only a few minutes or even a few seconds, and the measurement of the distribution of the interstage three-dimensional flow field parameters of the test piece along the blade height direction cannot be completed within a few seconds by adopting the conventional porous pressure probe.
In addition, the existing pressure blade type probe can only measure total pressure generally and cannot measure the airflow direction or Mach number, but the invention can measure the parameters of the total pressure, static pressure, inflow airflow angle, Mach number and the like at the outlet of the rotor.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the five-hole pressure vane type probe can simultaneously measure incoming flow parameters of a plurality of spatial positions, can furthest shorten the measurement time, and can complete the measurement of the incoming flow angle, total pressure, static pressure and Mach number of the stages of the test pieces distributed along the vane height direction, thereby reducing the test cost.
The technical solution of the invention is as follows:
the five-hole pressure leaf-shaped probe is characterized in that: the pressure measuring device comprises probes (1), a pressure leading pipe (2) and blades (3), wherein the probes (1) are cylinders with round tables at the heads, the number of the cylinders is determined according to measurement requirements, at least 3 pressure sensing holes are arranged at different spreading measurement positions of the blades (3) according to the measurement position requirements, 1 pressure sensing hole is formed in the center of the top surface of the round table of the probes (1) and is a middle hole (4), 4 pressure sensing holes are uniformly formed in the side surface of the round table of the probes (1) along the circumference and are respectively an upper hole (5), a left hole (6), a right hole (7) and a lower hole (8), the central lines of the middle hole (4), the upper hole (5) and the lower hole (8) are arranged on a plane, the left hole (6) and the right hole (7) are symmetrically distributed along the plane, the central lines of the middle hole (4), the left hole (6) and the right hole (7) are arranged on a plane, the upper hole (5) and the lower hole, each pressure sensing hole is independently communicated with one end of a pressure guiding pipe (2) which is encapsulated in the probe (1), and the pressure guiding pipe (2) is fixed on the surface of the blade (3) or in the blade (3) and is led out from the root of the blade (3).
2. Furthermore, the diameter of the top surface of the round table of the probe (1) is 0.4 mm to 1.5 mm, and the diameter of the bottom surface is 1.5 mm to 6 mm.
3. Further, the conical angle of the circular truncated cone of the probe (1) is 30-100 degrees.
4. Furthermore, the diameters of the middle hole (4), the upper hole (5), the left hole (6), the right hole (7) and the lower hole (8) are 0.2 mm to 1 mm.
5. Further, the distance between the middle hole (4) and the front edge of the blade (3) is 1 mm to 10 mm.
6. Further, the diameter of the pressure guide pipe (2) is 0.2 mm to 1 mm.
7. Furthermore, the pressure guide pipe (2) can be fixed on the surface of the blade or embedded in the blade for fixing.
8. Further, the probe (1) can be installed right in front of the leading edge of the blade (3), on the pressure surface side of the leading edge or on the suction surface side of the leading edge.
9. Furthermore, the distribution quantity of the probes (1) along the span direction of the blade (3) is determined according to the measurement requirement, and the number of the probes is at least 3, the two ends are generally dense, and the middle is sparse.
10. Further, the axial directions of the probes (1) are different, and the probes are respectively oriented in the expected incoming flow direction at the respective spatial positions.
The invention has the beneficial effects that:
the method can simultaneously measure the total pressure, the static pressure, the airflow angle and the Mach number of incoming flows at a plurality of spatial positions through calibration of the wind tunnel, and is suitable for measuring the distribution of incoming flow parameters of an interstage three-dimensional flow field of an aero-engine along the height direction of the blade. Compared with the existing porous pressure probe, the interstage three-dimensional flow field measurement can be instantly completed without a probe displacement mechanism and changing the position of a measuring point, so that the test cost is reduced; compared with the common total pressure blade type probe, the total pressure can be measured, and parameters such as an incoming flow airflow angle, static pressure, Mach number and the like can also be measured.
Drawings
FIG. 1 is a schematic diagram of a five-well pressure leaf probe.
Fig. 2 is a left side view of fig. 1.
Fig. 3 is a partially enlarged view of fig. 1.
Fig. 4 is a left side view of fig. 3.
Wherein: 1-probe, 2-pressure guide tube, 3-blade, 4-middle hole, 5-upper hole, 6-left hole, 7-right hole and 8-lower hole.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
As shown in fig. 1, the embodiment describes a five-hole pressure vane probe, which comprises a probe (1), a pressure guide tube (2), and a blade (3), wherein the probe (1) is a cylinder with a truncated cone-shaped head, the number of the probe is 5, the probe is respectively fixed at different spreading measurement positions of the blade (2), 1 pressure sensing hole is formed in the center of the top surface of the truncated cone of the probe (1) and is a middle hole (4), 4 pressure sensing holes are uniformly formed in the side surface of the truncated cone of the probe (1) along the circumference, and are respectively an upper hole (5), a left hole (6), a right hole (7), and a lower hole (8), the center lines of the middle hole (4), the upper hole (5), and the lower hole (8) are on a plane, the left hole (6) and the right hole (7) are symmetrically distributed along the plane, the center lines of the middle hole (4), the left hole (6), and the right hole (7) are on a plane, and the upper hole (5) and the lower hole (8) are, each pressure sensing hole is independently communicated with one end of a pressure guiding pipe (3) which is encapsulated in the probe (1), and the pressure guiding pipe (2) is fixed on the surface of the blade (3) or in the blade (3) and is led out from the root of the blade (3).
The diameter of the top surface of the circular truncated cone of the probe (1) is 0.5 mm, the diameter of the bottom surface of the circular truncated cone is 2.5 mm, and the conical angle of the circular truncated cone is 60 degrees; the diameters of the middle hole (4), the upper hole (5), the left hole (6) and the right hole (7) are 0.2 mm; the distance between the middle hole (4) and the front edge of the blade (3) is 3 mm; the pressure guide pipe (2) is embedded into the blade for fixing, and the diameter is 0.2 mm.
The method can simultaneously measure the total pressure, the static pressure, the airflow angle and the Mach number of incoming flows at a plurality of spatial positions through calibration of the wind tunnel, and is suitable for measuring the distribution of incoming flow parameters of an interstage three-dimensional flow field of an aero-engine along the height direction of the blade.
Claims (1)
1. The five-hole pressure leaf-shaped probe is characterized in that: the pressure measuring device comprises probes (1), a pressure leading pipe (2) and blades (3), wherein the probes (1) are cylinders with round tables at the heads, the number of the cylinders is determined according to measurement requirements, at least 3 pressure sensing holes are arranged at different spreading measurement positions of the blades (3) according to the measurement position requirements, 1 pressure sensing hole is formed in the center of the top surface of the round table of the probes (1) and is a middle hole (4), 4 pressure sensing holes are uniformly formed in the side surface of the round table of the probes (1) along the circumference and are respectively an upper hole (5), a left hole (6), a right hole (7) and a lower hole (8), the central lines of the middle hole (4), the upper hole (5) and the lower hole (8) are arranged on a plane, the left hole (6) and the right hole (7) are symmetrically distributed along the plane, the central lines of the middle hole (4), the left hole (6) and the right hole (7) are arranged on a plane, the upper hole (5) and the lower hole, each pressure sensing hole is independently communicated with one end of a pressure guiding pipe (2) which is encapsulated in the probe (1), and the pressure guiding pipe (2) is fixed in the blade (3) and is led out from the root of the blade (3);
the diameter of the top surface of the round table of the probe (1) is 0.4 mm, and the diameter of the bottom surface of the round table of the probe is 1.5 mm; the conical angle of the round table of the probe (1) is 30-100 degrees;
the diameters of the middle hole (4), the upper hole (5), the left hole (6), the right hole (7) and the lower hole (8) are 0.2 mm, and the distance between the middle hole (4) and the front edge of the blade (3) is 1 mm;
the diameter of the pressure guide pipe (2) is 0.2 mm, and the pressure guide pipe (2) is embedded into the blade for fixing;
the probes (1) are arranged on the suction surface side of the front edge of the blade (3), the distribution quantity of the probes (1) along the span direction of the blade (3) is determined according to the measurement requirement, at least 3 probes are arranged, the two ends are generally dense, the middle is sparse, the axial directions of the probes (1) are different, and the probes face the expected incoming flow direction respectively at the respective spatial positions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710196175.8A CN107063696B (en) | 2017-03-29 | 2017-03-29 | Five-hole pressure leaf-shaped probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710196175.8A CN107063696B (en) | 2017-03-29 | 2017-03-29 | Five-hole pressure leaf-shaped probe |
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| Publication Number | Publication Date |
|---|---|
| CN107063696A CN107063696A (en) | 2017-08-18 |
| CN107063696B true CN107063696B (en) | 2020-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710196175.8A Active CN107063696B (en) | 2017-03-29 | 2017-03-29 | Five-hole pressure leaf-shaped probe |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022127209A1 (en) * | 2020-12-18 | 2022-06-23 | 中国长江三峡集团有限公司 | Wind turbine meteorological data measuring device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2960596B1 (en) * | 2010-05-25 | 2014-05-02 | Turbomeca | DEVICE FOR THE MULTIPURPOSE ACQUISITION / DISTRIBUTION OF FLUID, IN PARTICULAR PRESSURE TAKING PROBE IN A TURBOMACHINE AIR INLET |
| CN203940946U (en) * | 2014-07-04 | 2014-11-12 | 北京航空航天大学 | A kind of five-hole probe for full flow directional detection |
| CN105716788B (en) * | 2015-11-02 | 2019-02-22 | 北京航空航天大学 | Three hole transonic speed pressure probes |
| CN105716779B (en) * | 2015-11-02 | 2019-02-22 | 北京航空航天大学 | Dynamic pressure blade profile probe |
| CN205982314U (en) * | 2016-08-26 | 2017-02-22 | 西安远方航空技术发展总公司 | Five hole probes |
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