CN106950006B - Hemispherical head four-hole dynamic pressure probe for measuring low-speed three-dimensional unsteady flow - Google Patents
Hemispherical head four-hole dynamic pressure probe for measuring low-speed three-dimensional unsteady flow Download PDFInfo
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- CN106950006B CN106950006B CN201710126785.0A CN201710126785A CN106950006B CN 106950006 B CN106950006 B CN 106950006B CN 201710126785 A CN201710126785 A CN 201710126785A CN 106950006 B CN106950006 B CN 106950006B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
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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
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
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Abstract
The invention belongs to the technical field of pressure testing, and discloses a hemispherical head four-hole dynamic pressure probe for measuring low-speed three-dimensional unsteady flow, which comprises a probe head and a supporting rod, wherein the probe head comprises a cylinder and a hemisphere which share a bottom surface, 4 dynamic pressure sensors are packaged in the probe head, 4 pressure sensing holes which are not communicated with each other are formed in the same side of the probe head, the side surface of the cylinder is provided with 3 pressure sensing holes, the 4 pressure sensing holes are respectively communicated with the 4 dynamic pressure sensors in the probe head, and cables of the 4 dynamic pressure sensors lead out of the tail part of the probe through a channel in the probe supporting rod. Compared with the existing pressure probe, the invention can simultaneously measure the changes of the total pressure, the static pressure, the deflection angle, the pitch angle and the Mach number of the low-speed three-dimensional unsteady flow field along with time after the calibration of the wind tunnel, and is suitable for the test of the low-speed three-dimensional unsteady flow fields of inlets, outlets and stages of low-speed compressors, fans, pumps and the like.
Description
Technical Field
The invention belongs to the technical field of pressure testing, relates to a dynamic pressure measuring device of a low-speed three-dimensional unsteady flow field, and particularly relates to a hemispherical head four-hole dynamic pressure probe for measuring low-speed three-dimensional unsteady flow, which is suitable for testing inlet, outlet and interstage three-dimensional unsteady flow fields of low-speed gas compressors, fans, pumps and the like.
Background
Three-dimensional flow fields of inlets, outlets and stages of low-speed compressors, fans, blowers, pumps and the like are unusual in nature due to fluid viscosity, rotation of rotors, existence of blade tip gaps, staggered arrangement of movable and static blade rows and the like. The dynamic characteristics of a flow field cannot be measured by adopting a conventional steady-state pressure probe, and a hot wire anemometer can measure a dynamic speed signal but cannot measure pressure information. For turbomachinery such as compressors, fans, blowers, pumps, etc., it is more desirable for researchers to obtain inlet, outlet, and interstage dynamic pressure profiles for verification of design and flow field diagnostics in order to improve machine performance.
At present, because of the lack of a practical dynamic testing technology of engineering, steady-state measuring technologies such as a five-hole pressure probe are generally adopted in engineering, and the pressure probe is driven to move to a measured position by a displacement mechanism arranged on a casing to measure a low-speed three-dimensional flow field. Because a longer pressure guiding pipe is arranged in the stable-state five-hole pressure probe, the formed cavity effect damps dynamic pressure information of the measured flow field, and the change rule of the total pressure, the static pressure, the deflection angle, the pitch angle and the Mach number of the measured flow field along with time cannot be truly reflected.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the problem that the measuring means of the low-speed three-dimensional unsteady flow fields such as inlets, outlets and stages of low-speed compressors, fans and pumps in the prior engineering is lack, the invention provides the hemispherical head four-hole dynamic pressure probe which has fast dynamic response and can measure the low-speed three-dimensional unsteady flow fields such as the inlets, outlets and stages of the low-speed compressors, fans and pumps, and the like, and the hemispherical head four-hole dynamic pressure probe can measure the change rule of the total pressure, static pressure, deflection angle, pitch angle and Mach number of the measured flow field along with the time.
The technical solution of the invention is as follows:
1. the utility model provides a measure four hole dynamic pressure probes of hemisphere head of three-dimensional unsteady flow of low-speed which characterized in that: including probe head (1), branch (2), probe head (1) is including sharing cylinder (3), hemisphere (4) of bottom surface, 4 dynamic pressure sensor of encapsulation in it, it has 4 not communicating pressure-sensitive holes each other to open with one side on probe head (1) surface, wherein cylinder (3) side is opened has 3 pressure-sensitive holes, be left hole (5), mesopore (6), right hole (7) respectively, on hemisphere (4) sphere of probe head (1), it has another pressure-sensitive hole to open, for last hole (8), 4 pressure-sensitive holes communicate with 4 dynamic pressure sensor of encapsulation in probe head (1) respectively.
2. Furthermore, the probe supporting rod (2) is a cylinder, a circular pipeline is arranged in the probe supporting rod, cables (9) of 4 dynamic pressure sensors packaged in the probe head (1) are led out of the tail of the probe through the pipeline in the probe supporting rod (2).
3. Furthermore, the central line of the middle hole (6), the central line of the upper hole (8) and the axis of the cylinder (3) of the probe head (1) are on the same plane, the left hole (5) and the right hole (7) are symmetrically distributed along the plane, and the circumferential included angle of the circle center of the left hole (5) and the circle center of the right hole (7) on the surface of the cylinder (3) of the probe head (1) is 70-110 degrees.
4. Furthermore, 4 pressure sensing holes are formed in the surface of the probe head (1), and the diameters of the left hole (5), the middle hole (6), the right hole (7) and the upper hole (8) are 0.6 mm to 1.5 mm.
5. Furthermore, the distance between the center of the middle hole (6) and the arc of the bottom surface of the hemisphere (4) of the probe head (1) is 1 mm to 5 mm.
6. Furthermore, the distance between the circle center of the upper hole (8) and the arc of the bottom surface of the hemisphere (4) of the probe head (1) is 2 mm to 5 mm.
7. Furthermore, the diameter of the cylinder (3) of the probe head (1) is 4 mm to 8 mm, the length of the cylinder is 10 mm to 45 mm, and the axis of the cylinder (3) of the probe head (1) is coincident with the axis of the probe support rod (2).
The invention has the beneficial effects that:
compared with the existing pressure probe, the invention can simultaneously measure the changes of the total pressure, the static pressure, the deflection angle, the pitch angle and the Mach number of the low-speed three-dimensional unsteady flow field along with time through calibrating the wind tunnel calibration, and provides a means for efficiently and accurately measuring the low-speed three-dimensional unsteady flow field for experiments of a low-speed compressor, a fan, a pump and the like.
Drawings
Fig. 1 is a schematic structural diagram of a hemispherical head four-hole dynamic pressure probe for measuring low-speed three-dimensional unsteady flow 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 supporting rod, 3-cylinder, 4-hemisphere, 5-left hole, 6-middle hole, 7-right hole, 8-upper hole, and 9-dynamic pressure sensor cable.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
As shown in fig. 1, in the present embodiment, a hemispherical head four-hole dynamic pressure probe for measuring a low-speed three-dimensional unsteady flow is described, including a probe head (1) and a support rod (2), where the probe head (1) includes a cylinder (3) and a hemisphere (4) sharing a bottom surface, 4 dynamic pressure sensors are encapsulated therein, 4 pressure sensing holes that are not communicated with each other are opened at the same side of the surface of the probe head (1), where 3 pressure sensing holes are opened at the side surface of the cylinder (3), which are a left hole (5), a middle hole (6) and a right hole (7), and another pressure sensing hole is opened on the sphere of the hemisphere (4) of the probe head (1), which is an upper hole (8), and the 4 pressure sensing holes are respectively communicated with the 4 dynamic pressure sensors encapsulated in the probe head (1).
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 probe supporting rod is 5 mm, and cables (9) of 4 dynamic pressure sensors packaged in the head portion (1) of the probe are led out of the tail portion of the probe through a pipeline in the probe supporting rod (2).
The central line of the middle hole (6), the central line of the upper hole (8) and the axis of the cylinder (3) of the probe head (1) are on the same plane, the left hole (5) and the right hole (7) are symmetrically distributed along the plane, and the circumferential included angle of the circle center of the left hole (5) and the circle center of the right hole (7) on the surface of the cylinder (3) of the probe head (1) is 90 degrees.
The probe head (1) is provided with 4 pressure sensing holes, and the diameters of the left hole (5), the middle hole (6), the right hole (7) and the upper hole (8) are 0.6 mm.
The distance between the center of the middle hole (6) and the arc of the bottom surface of the hemispheroid (4) of the probe head (1) is 1 mm.
The distance between the circle center of the upper hole (8) and the arc of the bottom surface of the hemispheroid (4) of the probe head (1) is 2 mm.
The diameter of the cylinder (3) of the probe head (1) is 6 mm, the length of the cylinder is 35 mm, and the axis of the cylinder (3) of the probe head (1) is coincided with the axis of the probe supporting rod (2).
The hemispherical head four-hole dynamic pressure probe for measuring the low-speed three-dimensional unsteady flow introduced in the embodiment of the invention can obtain calibration data through low-speed calibration wind tunnel calibration. When a low-speed three-dimensional unsteady flow field is actually measured, 4 dynamic pressure sensors of the four-hole dynamic pressure probe simultaneously measure unsteady pressure data sensed by the sensors, and the obtained low-speed calibration wind tunnel calibration data is utilized to perform data processing, so that the changes of the total pressure, the static pressure, the deflection angle, the pitch angle and the Mach number of the low-speed three-dimensional unsteady incoming flow along with time can be obtained.
Claims (1)
1. The utility model provides a measure four hole dynamic pressure probes of hemisphere head of three-dimensional unsteady flow of low-speed which characterized in that: the probe comprises a probe head (1) and a probe supporting rod (2), wherein the probe head (1) comprises a cylinder (3) and a hemisphere (4) which share the bottom surface, 4 dynamic pressure sensors are packaged in the cylinder (3), 4 pressure sensing holes which are not communicated with each other are formed in the same side of the surface of the probe head (1), the side surface of the cylinder (3) is provided with 3 pressure sensing holes which are a left hole (5), a middle hole (6) and a right hole (7), the spherical surface of the hemisphere (4) of the probe head (1) is provided with another pressure sensing hole which is an upper hole (8), and the 4 pressure sensing holes are respectively communicated with the 4 dynamic pressure sensors packaged in the probe head (1); the probe supporting rod (2) is a cylinder, a circular pipeline is arranged in the probe supporting rod, cables (9) of 4 dynamic pressure sensors are packaged in the probe head (1), and the tail part of the probe is led out through the pipeline in the probe supporting rod (2);
the central line of the middle hole (6), the central line of the upper hole (8) and the axis of the cylinder (3) of the probe head (1) are on the same plane, the left hole (5) and the right hole (7) are symmetrically distributed along the plane, and the circumferential included angle of the circle center of the left hole (5) and the circle center of the right hole (7) on the surface of the cylinder (3) of the probe head (1) is 70-110 degrees;
the diameters of the left hole (5), the middle hole (6), the right hole (7) and the upper hole (8) are 0.6 mm;
the distance between the center of the middle hole (6) and the arc of the bottom surface of the hemisphere (4) of the probe head (1) is 1 mm;
the distance between the circle center of the upper hole (8) and the arc of the bottom surface of the hemisphere (4) of the probe head (1) is 2 mm;
the diameter of the cylinder (3) of the probe head (1) is 6 mm, the length of the cylinder is 35 mm, and the axis of the cylinder (3) of the probe head (1) is superposed with the axis of the probe supporting rod (2);
the probe is calibrated through a low-speed calibration wind tunnel to obtain calibration data; when a low-speed three-dimensional unsteady flow field is actually measured, 4 dynamic pressure sensors of the four-hole dynamic pressure probe simultaneously measure unsteady pressure data sensed by the sensors, the obtained low-speed calibration wind tunnel calibration data is utilized to process the data, and the total pressure, static pressure, deflection angle, pitch angle and Mach number of the low-speed three-dimensional unsteady incoming flow are measured along with the change of time, so that a means for efficiently and accurately measuring the low-speed three-dimensional unsteady flow field is provided for low-speed compressor, fan and pump experiments.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710126785.0A CN106950006B (en) | 2017-03-06 | 2017-03-06 | Hemispherical head four-hole dynamic pressure probe for measuring low-speed three-dimensional unsteady flow |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710126785.0A CN106950006B (en) | 2017-03-06 | 2017-03-06 | Hemispherical head four-hole dynamic pressure probe for measuring low-speed three-dimensional unsteady flow |
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| Publication Number | Publication Date |
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| CN106950006A CN106950006A (en) | 2017-07-14 |
| CN106950006B true CN106950006B (en) | 2020-11-17 |
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| CN201710126785.0A Active CN106950006B (en) | 2017-03-06 | 2017-03-06 | Hemispherical head four-hole dynamic pressure probe for measuring low-speed three-dimensional unsteady flow |
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| CN115046724B (en) * | 2022-04-19 | 2023-07-07 | 海南大学 | Highly integrated wide-angle optical fiber pneumatic probe |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011148094A1 (en) * | 2010-05-25 | 2011-12-01 | Turbomeca | Device for multipoint acquisition/distribution of fluid, in particular probe for tapping pressure in a turbomachine air inlet |
| CN202582868U (en) * | 2012-05-11 | 2012-12-05 | 西北工业大学 | Testing device for measuring wing type wake flow field |
| 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 |
| CN105716788A (en) * | 2015-11-02 | 2016-06-29 | 北京航空航天大学 | Three-hole transonic speed pressure probe |
| CN105716779A (en) * | 2015-11-02 | 2016-06-29 | 北京航空航天大学 | Dynamic pressure blade type probe |
-
2017
- 2017-03-06 CN CN201710126785.0A patent/CN106950006B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011148094A1 (en) * | 2010-05-25 | 2011-12-01 | Turbomeca | Device for multipoint acquisition/distribution of fluid, in particular probe for tapping pressure in a turbomachine air inlet |
| CN202582868U (en) * | 2012-05-11 | 2012-12-05 | 西北工业大学 | Testing device for measuring wing type wake flow field |
| 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 |
| CN105716788A (en) * | 2015-11-02 | 2016-06-29 | 北京航空航天大学 | Three-hole transonic speed pressure probe |
| CN105716779A (en) * | 2015-11-02 | 2016-06-29 | 北京航空航天大学 | Dynamic pressure blade type probe |
Non-Patent Citations (1)
| Title |
|---|
| 四级低速轴流压气机端壁区流动的实验研究;张晨凯 等;《中国机械工程》;20140708;参见摘要，正文第1705、1706页 * |
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