基于响应面法的单元发动机喷注器优化设计  

Optimization Design of Monopropellant Thruster Injector Based on Response Surface Methodology

作　　者：邱鑫 白梅杉 陆文杰 姚天亮 刘俊 QIU Xin;BAI Meishan;LU Wenjie;YAO Tianliang;LIU Jun(Shanghai Institute of Space Propulsion,Shanghai 201112,China;Shanghai Engineering Research Center of Space Engine,Shanghai 201112,China)

机构地区：[1]上海空间推进研究所,上海201112 [2]上海空间发动机工程技术研究中心,上海201112

出　　处：《上海航天（中英文）》2024年第2期130-136,153,共8页Aerospace Shanghai（Chinese&English）

基　　金：国家自然科学基金(U21B2088);上海市优秀学术/技术带头人计划(22XD1422000)。

摘　　要：针对某新研单元发动机喷注器热阻优化的问题,采用仿真计算分析研究支架结构参数对支架热阻与结构强度的影响,并基于响应面法(RSM)对喷注器支架进行结构优化设计。计算结果表明:在计算范围内,对支架隔热性能影响最大的是支架高度,其次是支架厚度,最后是支架孔直径。随着支架高度的增加,支架热阻逐渐增大,而支架热阻则随着支架厚度与孔直径的增加而降低。对支架结构等效应力影响最大的是支架孔直径,其次是支架高度,最后是支架厚度,并且随着支架孔直径的增加,支架结构等效应力逐渐增大,而支架最大等效应力随着支架高度和厚度的增加而减小。通过采用响应面法改进后的支架在结构强度满足发动机力学环境的条件下,喷注器热阻得到明显提高。To improve the thermal resistance of an innovative monopropellant thruster injector,the effects of the structure parameters on the thermal resistance and structure strength are analyzed by means of simulation calculation,and the response surface methodology(RSM)is used to optimize the support structure of the injector.The simulation results show that within the calculation range,the height of the support structure has the greatest effect on the thermal resistance performance of the support structure,followed by the thickness of the support structure,and finally the diameter of the support structure hole.Moreover,the thermal resistance increases with the increase in the height of the support structure,while decreases when the thickness of the support structure and the diameter of the support structure hole increase.In addition,the diameter of the support structure hole has the greatest effect on the maximum equivalent stress of the support structure,followed by the height of the support structure,and finally the thickness of the support structure.The maximum equivalent stress of the support structure increases with the increase in the diameter of the support structure hole,while decreases when the height and thickness of the support structure increase.The structure strength of the support structure optimized with the RSM meets the mechanical requirements of the engine,and the thermal resistance of the injector is obviously improved.

关 键 词：响应面法 喷注器 优化设计 热阻 结构强度 敏感度 

分 类 号：V434.24[航空宇航科学与技术—航空宇航推进理论与工程]