Semi-physical simulation method and simulation device for aerodynamic effect in high-altitude and high-speed environment

Abstract

The invention discloses a semi-physical simulation method and a simulation device for the aerodynamic effect in a high-altitude and high-speed environment. The method comprises the following steps: in a high-altitude and high-speed working environment of an airborne camera, pressure and temperature data of the surface of an optical window is calculated through a mathematical method, and the optimal thickness of the optical window is optimized; then, the pressure and temperature data and the optimal thickness of the optical window directly act on an aerodynamic effect physical simulation device, differential pressure and temperature adjustment is carried out directly on the surface of the optical window, and physical simulation experiment is carried out; and finally, feedback to a mathematical simulation model is formed based on the physical experiment result. By adjusting pressure and temperature systems of inside-cabin and outside-cabin environment simulation chambers, a differential pressure environment and a high-temperature environment are established on the surface of the optical window, and an aerodynamic effect caused by high-altitude and high-speed air flowing across the surface of the optical window is simulated. Scientific experiment basis and conditions are created for the ground research of the influence of aerodynamic pressure and aerodynamic heating effect in a high-altitude and high-speed environment on the performance of the optical window.

Description

technical field [0001] The invention relates to the field of aerodynamic effects of optical technology, and more particularly, to a simulation method and test device for aerodynamic effects of optical windows in a high-altitude and high-speed environment. Background technique [0002] When an aircraft with an optical imaging detection system flies at high speed in the atmosphere, a complex flow field is formed between the optical hood and the incoming flow, which will cause thermal conduction, thermal radiation and image transmission interference to the optical imaging detection system, causing the target image to shift , dithering and blurring, this effect is known as aero-optical effect. [0003] The optical window is an indispensable key part of the ground observation of the airborne spectral camera. It is not only used to isolate the atmospheric environment and protect the internal structure of the aircraft system, but also provides an optical window for the aerial camer...

AI Technical Summary

Problems solved by technology

[0004] The high-altitude and high-speed working environment simulation device in the prior art mainly uses high-temperature and high-speed airflow across the surface of the optical window to cause aerodynamic pressure and aerodynamic heat to establish an airflow environment close to the real working condition, but the process of realizing the miniaturization and simplification of the wind tunnel test platform is complicated , and the wind tunnel produces supersonic and hypersonic airflow instantaneously, the duration is difficult to guarantee, and a lot of energy will be consumed in noise reduction and cooling

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