火箭发动机出口参数对喷焰流动及辐射的影响  

Influence of rocket engine exit parameters on flow and radiation characteristics of exhaust plume

作　　者：包醒东 余西龙[1] 毛宏霞[3] 王振华 徐颖[3] BAO Xingdong;YU Xilong;MAO Hongxia;WANG Zhenhua;XU Ying(State Key Laboratory of High Temperature Gas Dynamics,Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China;School of Engineering Science,University of Chinese Academy of Sciences,Beijing 100049,China;Science and Technology on Optical Radiation Laboratory,Beijing Institute of Environmental Features,Beijing 100854,China)

机构地区：[1]中国科学院力学研究所高温气体动力学国家重点实验室,北京100190 [2]中国科学院大学工程科学学院,北京100049 [3]北京环境特性研究所光学辐射重点实验室,北京100854

出　　处：《航空动力学报》2019年第11期2448-2457,共10页Journal of Aerospace Power

摘　　要：基于详细化学反应机理+逐线积分法+视在光线法开展了火箭发动机喷焰流动与辐射特性研究,分析了不同化学反应机理对流动与辐射的影响,利用地面试验数据校验了模型的正确性,并详细分析了火箭发动机出口参数变化对喷焰流动及辐射的影响规律。研究结果表明:喷管出口温度增加,对流场结构影响较小,但会显著提升喷焰的复燃效应;喷管出口压强增加,会对流场马赫波系结构产生影响,但对喷焰二次燃烧影响较小;喷焰红外辐射强度会随着出口温度或出口压强的升高而增加,且红外辐射强度与出口推力正相关。Based on the detailed chemical reaction mechanism,the flow and radiation of the plume were studied by the method of computational fluid dynamics(CFD)+line-by-line integration and light of sight method.The effects of different chemical reaction mechanisms on flow and radiation were compared and analyzed.The validity of the model was verified by optical measurement data.On this basis,the influence of rocket exit parameters on plume flow and radiation was analyzed in detail.The results showed that:the temperature of the nozzle exit had little effect on the structure of the flow field,but had a significant effect on the afterburning;the increase of pressure at the nozzle exit had an effect on the wave structure of the Maher disk,but had little effect on the afterburning;the infrared radiation intensity of the plume increased with the increase of the temperature and pressure of the nozzle exit,and the infrared radiation intensity was positively related to the thrust of the engine.

关 键 词：喷焰流动 火箭发动机出口参数 化学反应机理 流场结构 红外辐射 

分 类 号：V411.3[航空宇航科学与技术—航空宇航推进理论与工程]