Hole wall cross flow characteristic measuring device and measuring method
A measuring device and hole wall technology, applied in the field of wind tunnel experiments, can solve the problems of unrealistic simulation and prediction, the deviation of the cross flow of the hole wall from the linear model, etc.
Active Publication Date: 2021-10-08
INST OF HIGH SPEED AERODYNAMICS OF CHINA AERODYNAMICS RES & DEV CENT
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Problems solved by technology
[0006] The purpose of the invention of this application is to determine the perforation flow resistance coefficient mainly based on the small disturbance linear assumption, and then evaluate the performance of the perforation and the influence of interference. It is affected by the boundary layer along the wall and the main airflow, which makes the hole wall cross flow Obviously deviate from the linear model, and the complex structure of thousands of holes on the wall makes the simulation prediction impossible to achieve in a short period of time. A device and method for measuring the cross flow characteristics of the hole wall are provided
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Embodiment 1
[0076] This embodiment provides a device for measuring the lateral flow characteristics of the hole wall and a measuring method thereof. Wherein, the measuring device includes a main body for stabilizing pressure measuring 2, a pressure equalizing orifice plate 3, a hole wall test piece 1, a flow tube 4, a flow meter 10, a pressure measuring tube 5, a mobile measuring component, and a pressure sensor.
[0077] Such as figure 2 As shown, the voltage stabilizing measuring body 2 is in the shape of a barrel with one end open, and the section along its axial direction is U-shaped. In order to weaken or eliminate the disturbance of the cross flow on the hole wall to the airflow in the main body 2 of the pressure stabilization measurement, the main body 2 of the pressure stabilization measurement is designed as a combination of circular tube and hemispherical welding, with an aspect ratio ≥ 3.5. More specifically, the voltage stabilizing measuring body 2 is welded by a first circu...
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The invention discloses a hole wall cross flow characteristic measuring device and measuring method. The measuring device comprises a pressure stabilizing measuring main body, a pressure equalizing throttling orifice plate, a hole wall test piece, a flow tube, a flow meter, a pressure measuring tube, a mobile measuring assembly and a pressure sensor; the pressure stabilizing measuring main body is the shape of a barrel with an opening in one end, the opening end of the pressure stabilizing measuring main body is marked as a first working end, the end, opposite to the first working end, of the pressure stabilizing measuring main body is marked as a first airflow end, and a cavity in the pressure stabilizing measuring main body forms a pressure stabilizing cavity; and the pressure equalizing throttling orifice plate is arranged in the pressure stabilizing cavity, and a first cavity is formed between the pressure equalizing throttling orifice plate and the first airflow end. According to the hole wall cross flow characteristic measuring device and measuring method of the invention, continuous fine measurement of flow in a near-wall area in a hole wall boundary layer can be realized under a real test condition, relations among flow parameters such as cross flow velocity, boundary layer and wall plate pressure distribution and the like are rapidly established, and distribution and influence rules of the hole wall cross flow velocity are creatively, qualitatively and quantitatively analyzed.
Description
technical field [0001] The application relates to the field of wind tunnel experiments, in particular to a measuring device and a measuring method for the cross-flow characteristics of a hole wall. More specifically, the application provides a plenum device for testing the cross-flow characteristics of the wind tunnel wall, and its measurement method, which can be used in the design and correction of the wall plate of the transonic wind tunnel test section, with high application value. Background technique [0002] Open-hole wall plate is one of the main forms of the transonic wind tunnel test section; in the subsonic range, the hole wall can effectively reduce the blockage interference of the model and reduce the airflow velocity correction; in the transonic range, the hole wall can form Uniform hyposonic flow fields and reduced model-induced wave reflection disturbances. The determination of the opening form and hole parameters is one of the key technologies in the desig...
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IPC IPC(8): G01M9/00G01M9/02G01M9/06G01M9/08
CPCG01M9/00G01M9/02G01M9/06G01M9/08
Inventor 刘光远郭秋亭李为群杨可杨昕鹏陈植陆连山谢易吴安达
Owner INST OF HIGH SPEED AERODYNAMICS OF CHINA AERODYNAMICS RES & DEV CENT