3-KW concentric tubular resistojet performance.
3-KW concentric tubular resistojet performance.
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3 千瓦同心管式电阻喷射性能。
DOI：
10.2514/3.28723
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发表时间：
1966
影响因子：
1.6
通讯作者：
R. Short
中科院分区：
文献类型：
--
作者：
C. Halbach;R. J. Page;R. Short
本文介绍了一种电阻式喷气发动机的设计和制造。在以氢为推进剂的25小时试验中，当输入功率为3.0千瓦时，其真空比冲为840秒，推力为66.5克力。推力器的停滞条件是8.8 atm的压力和2420°K的气体温度。包括气体输入功率在内的总效率为79%。通过第一定律功率平衡，分别识别加热器和喷嘴的性能。基于空间真空膨胀的喷嘴功率效率为88%。加热器效率被发现为90%。给出了整个发动机的温度。使用气相沉积技术的钨热交换器制造方法是全新的，几乎可以实现任何所需的形状。大的、有效的热交换器表面导致加热元件的最高温度仅略高于最高气体温度。钨升华和电绝缘体温度，这两个寿命决定因素，在这种类型的设计中被最小化。
The design and fabrication are described for a resistojet, the performance of which, during a 25-hr test using hydrogen as a propellant, was a vacuum specific impulse of 840 sec and a thrust of 66.5 g force for 3.0 kw of electric power input. The thruster stagnation conditions were a pressure of 8.8 atm and a gas temperature of 2420°K. The over-all efficiency, which includes the input power of the gas, was 79%. Through a first-law power balance, the performances of the heater and nozzle are separately identified. The nozzle power efficiency based on expansion to space vacuum was 88%. The heater efficiency was found to be 90%. Temperatures throughout the engine are given. The tungsten heat-exchanger fabrication method using vapor-deposition techniques is completely new, allowing almost any shape desired. A large, effective, heat-exchanger surface results in a maximum temperature of the heating element only slightly above the maximum gas temperature. Tungsten sublimation and electrical-insulator temperature, both life-deter mining factors, were minimized in this type design.