基于TRIZ理论的发动机试验羽流压力测量系统改进  

Improvement of thruster test plume pressure measurement system based on TRIZ theory

作　　者：曹纯[1] 杨龙[1] CAO Chun;YANG Long(Beijing Institute of Aerospace Testing Technology,Beijing 100074,China)

机构地区：[1]北京航天试验技术研究所,北京100074

出　　处：《航空学报》2024年第11期146-157,共12页Acta Aeronautica et Astronautica Sinica

基　　金：国家级项目。

摘　　要：羽流压力是火箭发动机高空模拟试验测量的重要参数之一,能够有效地反映发动机的工作性能。针对某型号固体火箭发动机羽流高空模拟试验压力测量系统存在的未能测量到羽流场压力变化的问题,基于发明问题解决理论(TRIZ)分析系统存在的问题,开展问题复现试验。依据问题定位结果,利用物理矛盾和物质-场模型的问题解决原理提出解决方案;并结合现场情况选择羽流压力测量系统的改进方案,对压力传感器内部电路进行绝缘处理,提升压力测量系统性能。改进后的系统满足发动机试验的羽流压力测量需求。In the thruster altitude simulation test,the plume-field pressure is one of the key parameters characterizing the working properties of the thruster.Aiming at the failure of the pressure measuring system in detecting the variation of the plume-field pressure during working in one test of a solid propellant rocket thruster,we apply the Theory of Inventive Problem Solving(TRIZ)theory to problem analysis,based on which the fault reproduction is performed.Through cause-and-effect chain analysis,the major problem of the pressure measuring system is dedicatedly investigated and determined.Following the problem identification outcome,we propose the improved plume-field pressure measurement strategy in line with the resolution of physical contradiction and substance-field model,as well as the practical testing condition.The insulating paint is sprayed on the internal circuit surface of the pressure sensors to prevent the low-pressure discharge of electronic units.Experimental results reveal the technical efficacy of the revised pressure measurement strategy.Thus,the improved pressure measurement system is capable of more effectively detecting the plume-field pressure,satisfying the measurement demand of the thruster altitude simulation test.

关 键 词：羽流压力测量 发明问题解决理论(TRIZ) 因果链分析 物理矛盾 物质-场模型 

分 类 号：V416.8[航空宇航科学与技术—航空宇航推进理论与工程]