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后体尾喷流干扰问题的准确模拟,对大尺度一体化飞行器气动力预测及后体尾喷流干扰机理认识至关重要。为了研究后体尾喷流干扰问题,本文基于相似理论,开展了模拟内外流相似参数的喷流干扰实验方案研究。提出了采用CF4+Air混合气体形式,模拟超然冲压发动机出口热态喷流的比热比等相似参数,建立了模拟真实条件下的喷流干扰问题的模拟方案。采用数值仿真软件对飞行条件和风洞条件下后体尾喷流干扰问题进行了数值模拟,从数值模拟结果来看,模拟内外流相似参数的喷流干扰实验方案是完全可行的。
The accurate simulation of the rear body jet flow interference problem is very important to the understanding of the aerodynamic prediction and the rear body jet disturbance mechanism of the large-scale integrated aircraft. In order to study the interference of body-end jet, this paper, based on the similarity theory, conducts a research on the experimental program of jet-perturbation that simulates the similar parameters of internal and external flow. A simulation scheme of simulating the jet flow disturbance under real conditions was proposed using the CF4 + Air mixed gas and simulating the specific heat ratio of the hot jets at the exit of the transcendental ramjet engine. Numerical simulation software is used to simulate the flight condition and the rear body jet disturbance under wind tunnel conditions. From the numerical simulation results, it is feasible to simulate the jet disturbance experiment with similar parameters of internal and external flow.