电弧风洞半椭圆喷管流场测试分析

在电弧风洞试验中,半椭圆喷管试验技术为平板模型提供了较宽的试验流场,可以有效提高电弧加热器的能量利用率,应用于热结构考核试验。以总温、皮托压力、模型表面热流、表面压力、红外热图温度、背温等多参数测试结合数值模拟的方法分析了流场均匀性及参数分布,试验区总温、皮托压力测试表明,波动小于3%的宽度均匀区可达喷管出口长边的75%以上。

Calibration and Analyses Flow of the Semi ellipse Nozzle in Arc Wind Tunnel

The semi-ellipse nozzle can provides wider test flow field for plane model and enhances efficiency of the heater energy in arc heated wind tunnel for TPS test. The parameters such as total temperature, stagnation pressure, and surface heat flux, surface pressure, infrared temperature, back temperature and the numerical simulation can verify the parameters distribution and the flow uniformity. The results indicate that the core flow which parameters fluctuate less than 3% is more than 75% breadth at the exit of nozzle.