摘要
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 reentry atmospheric environments, a ground simulation test system on ther mal plasma is designed. The system can, using Ar and H2 gas, produces a thermal plasma jet with high tem perature and velocity. The plasma jet can be equivalent to the reentry thermal environments based on thermal and Ma quantities. Using the law of energy balance, the thermal enthalpy, velocity and temperature can be calculated by measuring the input voltages, related currents, water temperatures, primary gas flow rates, as well as secondary gas flow rates. We obtain the distributions of the plasma jet by numerical simulation, and furthermore the results are compared with those of the experiments. The result shows that the system has the advantages of easy adjustment, high precision and efficient to simulate the reentry atmospheric environments.
出处
《测试技术学报》
2013年第3期248-253,共6页
Journal of Test and Measurement Technology
关键词
等离子体
模拟
再入
能量平衡
仿真计算
plasma
simulate
reentry
energy balance
numerical simulation
