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电弧加热器可以提供马赫数10以上连续式风洞运行总温、总压的参数要求,将其用于气动力试验风洞加热器,需要对其流场品质进行优化。通过改进电弧加热器的结构和配置冷气混合室及稳定段,改善了喷管出口参数在空间分布的均匀性和时间上的稳定性,并减缓了流场气流的旋转和脉动,提高了试验参数的重复性。经初步流场测试及天平测力可行性研究表明:流场核心区的总温及皮托压力偏差小于平均值的2%,试验测力数据与常规高超声速风洞接近。
Arc heaters can provide the parameters of the total temperature and the total pressure of the continuous wind tunnel with a Mach number of 10 or more. The arc heater can be used to test the wind tunnel heater for aerodynamic tests, and the quality of the flow field needs to be optimized. By improving the structure of the arc heater and arranging the air-conditioning mixing chamber and the stabilizing section, the uniformity and time stability of the nozzle outlet in spatial distribution are improved, the rotation and pulsation of the airflow in the flow field are slowed, and the test parameters Repeatability. The preliminary flow field test and balance test force feasibility study showed that: the total temperature in the core of the flow field and Pitot pressure deviation is less than 2% of the average, the test force data close to the conventional hypersonic wind tunnel.