超燃冲压发动机电弧加热器试验流场调试

A preliminary study of the arc flow field for scramjet research

利用电弧加热器提供超燃冲压发动机地面模拟试验的纯空气流场,需要在前电极与喷管之间由冷气混合室加入冷气以降低电弧加热气体的焓值;为了较为准确地获得流场的总温参数,采用了总温探针对流场总温900～1600K进行了校测,总温的测量值与计算的焓值、流量匹配法计算的总温进行了对比,结果表明:总温越高,测量值与计算值相差越大,在名义总温1600K时达到了450K,笔者分析了产生的原因.

The arc air flows with long duration and lower temperature by adding cooling air into the mixing chamber among the front electrode and nozzle is an idea for scramjet research. Temperature measurement probes were used to calibrate the flow field and reasonable results were obtained, though discrepancy between measurements and calculations occurred. The discrepancy became greater up to 450K as the measured temperatures reached 1600K,and the preliminary analysis for the discrepancy is presented in this paper.