一种分离激波振荡频率的多维捕捉系统及方法
By combining wind tunnel experiments with pulsating pressure and high-frequency schlieren measurement systems, the accuracy and cost issues of separating shock wave oscillation frequency measurement in existing technologies have been solved. This has enabled the acquisition of multi-dimensional frequency data, improved measurement accuracy and data reliability, and supported the safety of aircraft structures.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA ACAD OF AEROSPACE AERODYNAMICS
- Filing Date
- 2024-07-24
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies struggle to accurately capture the oscillation frequency of separation shock waves, especially in high-speed flows at high Reynolds numbers. Experimental methods suffer from large measurement errors and are limited to a single dimension, while numerical simulation methods consume significant computational resources and produce results with large deviations.
A wind tunnel experiment was used in conjunction with a pulsating pressure measurement system and a high-frequency schlieren measurement system to obtain the oscillation frequency of the separated shock wave from the axial and radial directions, respectively. Multidimensional frequency data were obtained through a pulsating pressure sensor and high-frequency schlieren technology. The sensor layout and data processing were optimized by combining numerical simulation methods.
It improves the accuracy and reliability of the measurement of the separation shock wave oscillation frequency, saves computing costs, and provides accurate ground experimental data support for weakening or eliminating the impact of low-frequency oscillations of separation shock waves on aircraft.
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Figure CN118776805B_ABST