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本文主要论述90瓩直流磁稳电弧加热器的研制经验, 本加热器经过九百六十多次调试实验和性能测量已初步定型, 加热器能满足现有实验技术要求。本加热器的电弧电压及电流波动率小于±0.5%, 电参数不重复率小于±1%,驻点热流不重复率小于±1.42%, 射流的驻点焓为2070卡/克, 温度为4500°K,驻点压力为1.07大气压, 可用在常压下进行小模型的驻点烧蚀实验及高温测试技术研究。在本文中, 首先介绍了加热器的组成系统及工作概况, 而后讨论了加热器系统及辅助系统的设计细节及在设计和调试加热器过程中所考虑及解决的一些问题。其中, 如利用不锈钢管制成的水冷镇定变阻器和利用临界喷管来控制进气流量获得了更好效果。其次, 文中介绍了加热器性能调试及测量结果, 讨论了稳定性和重复性等问题,并给出了调试及测量数据。最后, 对本加热器的再入模拟能力作了近似计算。
This paper mainly discusses the 90 瓩 DC magnetically-stable arc heater development experience, the heater after more than nine hundred and sixty commissioning experiments and performance measurement has been initial shape, the heater can meet the existing experimental technical requirements. The arc voltage and current fluctuation rate of the heater is less than ± 0.5%, the repetition rate of electrical parameters is less than ± 1%, the stagnation point heat flow non-repetition rate is less than ± 1.42%, the stagnation enthalpy of the jet is 2070 cal / g and the temperature is 4500 ° K, stagnation point pressure of 1.07 atm, available at atmospheric pressure for small model stagnation point ablation experiment and high temperature test technology research. In this paper, the heater system and work profile are introduced firstly. Then the design details of the heater system and auxiliary system are discussed. Some problems that are considered and solved in the process of designing and debugging the heater are discussed. Among them, such as the use of stainless steel pipe made of water-cooled varistor and the use of critical nozzle to control the intake flow obtained better results. Secondly, the paper introduces the heater performance tuning and measurement results, discusses the stability and repeatability problems, and gives the commissioning and measurement data. Finally, the heater’s reentry simulation capability is approximated.