应用于高气压运行的片式电弧加热器初步研究

片式电弧加热器模拟焓值范围宽，是开展热防护试验的理想设备。为拓宽其压力模拟范围，开展了片式电弧加热器内流分析方法研究，并与片式电弧加热器高气压试验进行了对比，结果吻合较好。为解决高气压运行试验出现的问题，研制了耐压、耐高热流压缩片，增强了压缩片的冷却效果，短化了片式电弧加热器电极，采取内壁防护措施使表面高温氧化产物减少和热量损失降低。探索高气压片式电弧加热器运行模式，解决了高气压运行串弧问题。试验的运行压力超过10 MPa，单电极运行电弧电流超过5000 A，提高了片式电弧加热器的试验能力。

A preliminary study of segmented arc heater used for high pressure operation

The segmented arc heater is an ideal thermal protection test equipment for having a wide range of enthalpy. In order to broaden the simulation range of pressure, the analysis method of the segmented arc heater internal flow is developed. The prediction results match the high pressure operation test results. To solve the problems in the high pressure test, some technical measures have been taken the pressure and heat resistance segments are developed cooling is strengthen and the electrode is shortened. The internal protective measures are studied to reduce surface oxidation and heat loss of segments. The operational mode is explored to solve the string arc problem in the high pressure operation test. The operation pressure of the test exceeds 10 MPa, the operation current exceeds 5000 A on a single electrode, which improves the testing ability of the segmented arc heater.