The development status of a 2,500 N H_2O_2/kerosene bipropellant thruster is described in this paper. The autoiginition of the kerosene was varified by the hot firing test without film cooling. The chamber pressure was sustained consistently during the operation. The characteristic velocity efficiency and the chamber pressure fluctuation were 90.5%, and 0.80 %, respectively. A film cooling is applied to protect the chamber and nozzle material from the combustion gas using hydrogen peroxide as a coolant. Four experimental cases were conducted by varying the proportion of the coolant with respect to total amount of fed hydrogen peroxide between 13.4% to 25.6%. The temperature at the nozzle throat reached steady state when the coolant was 25.6%. From the test results, cooling performance was supposed to sufficient to cool down the coolant rate supplied between 22.2% and 25.6%.
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机译：介绍了2500 N H_2O_2 /煤油双推进剂推进器的发展状况。煤油的自燃在没有薄膜冷却的情况下通过热烧成试验而改变。在操作过程中，腔室压力持续保持不变。特性速度效率和腔室压力波动分别为90.5％和0.80％。使用过氧化氢作为冷却剂进行薄膜冷却，以保护燃烧室和喷嘴材料免受燃烧气体的影响。通过改变冷却剂相对于进料的过氧化氢总量的比例在13.4％至25.6％之间进行了四个实验案例。当冷却剂为25.6％时，喷嘴喉部的温度达到稳态。从测试结果来看，冷却性能被认为足以冷却所提供的冷却剂速率在22.2％至25.6％之间。
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