CN106989896B - Dynamic temperature and pressure combined probe for measuring subsonic three-dimensional unsteady flow field - Google Patents
Dynamic temperature and pressure combined probe for measuring subsonic three-dimensional unsteady flow field Download PDFInfo
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- CN106989896B CN106989896B CN201710247116.9A CN201710247116A CN106989896B CN 106989896 B CN106989896 B CN 106989896B CN 201710247116 A CN201710247116 A CN 201710247116A CN 106989896 B CN106989896 B CN 106989896B
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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
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
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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 temperature and pressure testing, and discloses a dynamic temperature and pressure combined probe for measuring an infrasonic three-dimensional unsteady flow field, which comprises a probe head and a support rod, wherein the probe head is a wedge top cylinder, 4 dynamic pressure sensors are packaged in the probe head, 1 dynamic temperature sensor is installed in the probe head, the head of the temperature sensor is exposed out of a wedge top inclined plane, 4 pressure sensing holes which are not communicated with each other are formed in the same side of the surface of the probe head and are respectively communicated with the 4 dynamic pressure sensors in the probe head, and cables of the pressure sensors and the temperature sensors are led out of the tail of the probe through a channel in the probe support rod. Compared with the existing flow field test probe, the method can simultaneously measure the temperature, total pressure, static pressure, deflection angle, pitch angle, Mach number and the change of three-dimensional velocity components of subsonic incoming flow along with time through calibration of the wind tunnel, and provides a means for efficiently, accurately and comprehensively measuring parameters of subsonic three-dimensional unsteady flow fields for turbine experiments.
Description
Technical Field
The invention belongs to the technical field of temperature and pressure testing, relates to a dynamic temperature and dynamic pressure measuring device of a subsonic three-dimensional unsteady flow field, and particularly relates to a dynamic temperature and pressure combined probe for measuring the subsonic three-dimensional unsteady flow field, which is suitable for testing subsonic three-dimensional dynamic flow fields at an inlet, an outlet and an interstage of an impeller machine.
Background
The aerodynamic performance of an air compressor and a fan of an aircraft engine can be seriously influenced by the dynamic temperature and dynamic pressure combined distortion of an inlet flow field, even the stalling and surging of the engine can be caused, the influence mechanism of the dynamic temperature and dynamic pressure combined distortion is researched, and the measurement of subsonic three-dimensional dynamic flow fields of the air compressor, the fan inlet, the interstage and the rotor outlet with the dynamic temperature and dynamic pressure combined distortion is urgently needed. At present, a dynamic pressure sensor can only be used for measuring dynamic pressure signals, a small inertia thermocouple is used for measuring dynamic temperature signals, a conventional steady-state pressure probe is used for measuring total pressure distribution, more three-dimensional unsteady flow field information cannot be provided, and a more targeted measuring means is urgently needed.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the problem of insufficient measuring means in the research of dynamic temperature and dynamic pressure combined distortion influence mechanism, the dynamic temperature and pressure combined probe for measuring the subsonic three-dimensional unsteady flow field is provided, and compared with the existing flow field test probe, the dynamic temperature and pressure combined probe can simultaneously measure the change of the temperature, total pressure, static pressure, deflection angle, pitch angle, Mach number and three-dimensional velocity component of subsonic incoming flow along with time.
The technical solution of the invention is as follows:
1. the utility model provides a measure dynamic temperature pressure combination probe of subsonic three-dimensional unsteady flow field which characterized in that: the probe comprises a probe head (1) and a support rod (2), wherein the probe head (1) comprises a cylinder (3) and a cylinder beveling body (4) which share the bottom surface, 4 dynamic pressure sensors are packaged in the probe head, 1 dynamic temperature sensor is installed in the probe head, and the head (5) of the dynamic temperature sensor is exposed out of an inclined plane (6) of the cylinder beveling body (4); the same side of probe head (1) surface is opened has 4 not communicating pressure-sensitive holes each other, wherein on inclined plane (6) of the cylinder miscut body (4) of probe head (1), the front lower place of temperature sensor head (5), it has a pressure-sensitive hole to open, for last hole (7), it has 3 pressure-sensitive holes to open on probe head (1) cylinder (3) side, be left hole (8) respectively, mesopore (9), right hole (10), 4 pressure-sensitive holes communicate with 4 dynamic pressure sensor in the probe head (1) respectively.
2. Furthermore, the probe supporting rod (2) is a cylinder, a circular pipeline is arranged in the probe supporting rod, 4 dynamic pressure sensors and 1 dynamic temperature sensor cable (11) are packaged in the probe head (1), and the tail of the probe is led out through the pipeline in the probe supporting rod (2).
3. Furthermore, the inclined plane (6) of the cylindrical oblique cutting body (4) of the probe head (1) forms an included angle of 30-54 degrees with the axis of the cylinder (3).
4. Furthermore, the diameter of the upper hole (7) is 0.6 mm to 1.5 mm, and the distance between the circle center of the upper hole (7) and the lowest point of the arc of the inclined plane (6) is 1 mm to 5 mm.
5. Furthermore, the diameters of the left hole (8), the middle hole (9) and the right hole (10) are 0.6 mm to 1.5 mm, and the distance between the circle center of the middle hole (9) and the lowest point of the arc of the inclined plane (6) is 1 mm to 5 mm.
6. Furthermore, the center line of the head (5) of the dynamic temperature sensor, the center line of the upper hole (7), the center line of the middle hole (9) and the axis of the cylinder (3) of the probe head (1) are on the same plane, the left hole (8) and the right hole (10) are symmetrically distributed along the plane, and the included angle between the center lines of the left hole (8) and the right hole (10) is 60-100 degrees.
7. Furthermore, the axis of the cylinder (3) of the probe head (1) is coincident with the axis of the probe supporting rod (2).
8. Furthermore, the diameter of the cylinder (3) of the probe head (1) is 4.5 mm to 8 mm, and the length of the cylinder is 10 mm to 50 mm.
The invention has the beneficial effects that:
compared with the existing flow field test probe, the method can simultaneously measure the temperature, total pressure, static pressure, deflection angle, pitch angle, Mach number and the change of three-dimensional velocity components of subsonic incoming flow along with time through calibration of the wind tunnel, and provides a means for efficiently, accurately and comprehensively measuring parameters of subsonic three-dimensional unsteady flow fields for turbine experiments.
Drawings
Fig. 1 is a schematic structural diagram of a dynamic temperature and pressure combination probe for measuring a subsonic three-dimensional unsteady flow field in an embodiment of the present invention.
Fig. 2 is a left side view of fig. 1.
Fig. 3 is a view from direction a of fig. 2.
Wherein: 1-probe head, 2-probe support rod, 3-cylinder, 4-cylinder beveling body, 5-dynamic temperature sensor head, 6-inclined plane, 7-upper hole, 8-left hole, 9-middle hole, 10-right hole and 11-cable.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
As shown in fig. 1, the present embodiment introduces a dynamic temperature and pressure combined probe for measuring an infrasonic three-dimensional unsteady flow field, which includes a probe head (1) and a support rod (2), wherein the probe head (1) includes a cylinder (3) and a cylinder chamfer (4) which share a bottom surface, 4 dynamic pressure sensors are encapsulated in the probe head, 1 dynamic temperature sensor is installed in the probe head, and a head (5) of the dynamic temperature sensor is exposed out of an inclined plane (6) of the cylinder chamfer (4); the same side of probe head (1) surface is opened has 4 not communicating pressure-sensitive holes each other, wherein on inclined plane (6) of the cylinder miscut body (4) of probe head (1), the front lower place of temperature sensor head (5), it has a pressure-sensitive hole to open, for last hole (7), it has 3 pressure-sensitive holes to open on probe head (1) cylinder (3) side, be left hole (8) respectively, mesopore (9), right hole (10), 4 pressure-sensitive holes communicate with 4 dynamic pressure sensor in the probe head (1) respectively.
The probe supporting rod (2) is a cylinder, the diameter of the probe supporting rod is 8 mm, a circular channel is formed in the probe supporting rod, the diameter of the circular channel is 5 mm, and the tail part of the probe is led out through a pipeline in the probe supporting rod (2) by 4 cables (11) of the dynamic pressure sensors and 1 cable of the dynamic temperature sensor which are packaged in the head part (1) of the probe.
The inclined plane (6) of the cylindrical oblique cutting body (4) of the probe head (1) forms an included angle of 48 degrees with the axis of the cylinder (3).
The diameter of the upper hole (7) is 0.6 mm, and the distance between the circle center of the upper hole (7) and the lowest point of the arc of the inclined plane (6) is 2 mm.
The diameters of the left hole (8), the middle hole (9) and the right hole (10) are 0.6 mm, and the distance between the circle center of the middle hole (9) and the lowest point of the arc of the inclined plane (6) is 1 mm.
The center line of the head (5) of the dynamic temperature sensor, the center line of the upper hole (7), the center line of the middle hole (9) and the axis of the cylinder (3) of the probe head (1) are on the same plane, the left hole (8) and the right hole (10) are symmetrically distributed along the plane, and the included angle of the center lines of the left hole (8) and the right hole (10) is 90 degrees.
The axis of the cylinder (3) of the probe head (1) is coincided with the axis of the probe supporting rod (2).
The diameter of the cylinder (3) of the probe head (1) is 6 mm, and the length is 40 mm.
The dynamic temperature and pressure combined probe for measuring the subsonic three-dimensional unsteady flow field introduced in the embodiment of the invention can obtain calibration data through the calibration of the subsonic speed calibration wind tunnel. When the subsonic three-dimensional unsteady flow field is actually measured, the unsteady pressure and unsteady temperature data sensed by the 4 dynamic pressure sensors and the 1 dynamic temperature sensor of the dynamic temperature and pressure combined probe are measured simultaneously, the obtained subsonic calibration wind tunnel calibration data is utilized to perform data processing, and the change of subsonic incoming flow temperature, total pressure, static pressure, deflection angle, pitch angle, Mach number and three-dimensional speed along with time can be obtained.
Claims (1)
1. The utility model provides a measure dynamic temperature pressure combination probe of subsonic three-dimensional unsteady flow field which characterized in that: the probe comprises a probe head (1) and a support rod (2), wherein the probe head (1) comprises a cylinder (3) and a cylinder beveling body (4) which share a bottom surface, 4 dynamic pressure sensors are packaged in the cylinder (3), 1 dynamic temperature sensor is installed in the cylinder beveling body (4), an inclined plane which is intersected with the axis of the cylinder (3) is a flat inclined plane, and the head (5) of the dynamic temperature sensor is exposed out of an inclined plane (6) of the cylinder beveling body (4); the same side of the surface of the probe head (1) is provided with 4 pressure sensing holes which are not communicated with each other, wherein the inclined plane (6) of the cylindrical oblique cutting body (4) of the probe head (1) is provided with one pressure sensing hole which is an upper hole (7) at the front lower part of the temperature sensor head (5), the side surface of the cylinder (3) of the probe head (1) is provided with 3 pressure sensing holes which are a left hole (8), a middle hole (9) and a right hole (10), and the 4 pressure sensing holes are respectively communicated with 4 dynamic pressure sensors in the probe head (1);
the probe supporting rod (2) is a cylinder, a circular pipeline is arranged in the probe supporting rod, 4 dynamic pressure sensors and 1 dynamic temperature sensor cable (11) are packaged in the probe head (1), and the tail of the probe is led out through the pipeline in the probe supporting rod (2);
the included angle between the inclined plane (6) of the cylindrical oblique cutting body (4) of the probe head (1) and the axis of the cylinder (3) is 54 degrees;
the diameter of the upper hole (7) is 0.6 mm, and the distance between the circle center of the upper hole (7) and the lowest point of the arc of the inclined plane (6) is 2 mm;
the diameters of the left hole (8), the middle hole (9) and the right hole (10) are 0.6 mm, and the distance between the circle center of the middle hole (9) and the lowest point of the arc of the inclined plane (6) is 1 mm;
the central line of the head (5) of the dynamic temperature sensor, the central line of the upper hole (7), the central line of the middle hole (9) and the axis of the cylinder (3) of the probe head (1) are on the same plane, the left hole (8) and the right hole (10) are symmetrically distributed along the plane, and the included angle between the central lines of the left hole (8) and the right hole (10) is 60-100 degrees;
the axis of the cylinder (3) of the probe head (1) is superposed with the axis of the probe supporting rod (2);
the diameter of the cylindrical body (3) of the probe head (1) is 4.5 mm to 8 mm, and the length of the cylindrical body is 10 mm to 50 mm;
the dynamic temperature and pressure combined probe is calibrated through a subsonic calibration wind tunnel, calibration data can be obtained, when a subsonic three-dimensional unsteady flow field is actually measured, 4 dynamic pressure sensors and 1 dynamic temperature sensor of the dynamic temperature and pressure combined probe simultaneously measure unsteady pressure and unsteady temperature data respectively sensed, the obtained subsonic calibration wind tunnel calibration data is utilized for data processing, subsonic incoming flow temperature, total pressure, static pressure, deflection angle, pitch angle, Mach number and three-dimensional speed change along with time can be obtained, the dynamic temperature and pressure combined probe is suitable for testing of an inlet, an outlet and an interstage subsonic three-dimensional dynamic flow field of an impeller machine, and a means for efficiently, accurately and comprehensively measuring parameters of the subsonic three-dimensional unsteady flow field is provided for an impeller machine experiment.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710247116.9A CN106989896B (en) | 2017-04-17 | 2017-04-17 | Dynamic temperature and pressure combined probe for measuring subsonic three-dimensional unsteady flow field |
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| CN201710247116.9A CN106989896B (en) | 2017-04-17 | 2017-04-17 | Dynamic temperature and pressure combined probe for measuring subsonic three-dimensional unsteady flow field |
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| CN106989896A CN106989896A (en) | 2017-07-28 |
| CN106989896B true CN106989896B (en) | 2021-09-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111220348A (en) * | 2020-03-06 | 2020-06-02 | 上海海事大学 | Compound five-hole pressure-temperature probe |
| CN111487440A (en) * | 2020-04-14 | 2020-08-04 | 大连凌海华威科技服务有限责任公司 | Calibration method of five-hole probe |
| CN113340561B (en) * | 2021-08-02 | 2021-10-29 | 中国空气动力研究与发展中心空天技术研究所 | Eccentric cylindrical single-hole pneumatic probe for measuring precision in high altitude |
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