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为了模拟再入飞行的热环境,研制了基于热等离子体为热源的再入飞行地面模拟烧蚀试验系统.该试验系统将氩气和氢气等工作气体电离、加速后产生高温、高速的热等离子体射流,基于热量和Ma数等效来模拟再入飞行的热环境;根据能量平衡原理,给出试验系统的焓值、出口温度和速度等参数的计算方法,通过测量系统的输入电压、电流、水温、主气和次气的流量等,计算出一定工况下的参数分布;通过仿真计算,得出了系统的流场分布;并通过试验对计算结果进行了验证.该试验系统具有参数调节性好、精度高、应用范围广、可以模拟不同的再入飞行环境等特点,为再入热防护研究等方面提供了切实可行的试验手段.
In order to simulate the thermal environment of reentry flight, a ground ablation test system based on thermal plasma for heat re-entry was developed.The experiment system ionized the working gas such as argon and hydrogen to produce high-temperature and high-speed thermal plasma Based on the principle of energy balance, the calculation method of parameters such as enthalpy, outlet temperature and velocity of the test system is given. By measuring the input voltage and current of the system , The water temperature, the main gas and the secondary gas flow and so on, calculates the parameter distribution under a certain working condition. Through the simulation calculation, obtains the system flow field distribution, and verifies the calculation result through the experiment.This experiment system has the parameter Good regulation, high precision, wide range of applications, can simulate different characteristics such as reentry flight environment, and provide practical test methods for reheat protection research.