短套管二元引射喷管设计及气动与红外特性数值研究  

Numerical Simulation of Two-dimensional Ejector Nozzle with Short Shroud

作　　者：刘福城[1] 吉洪湖[1] 斯仁[1] 刘常春[1] 

机构地区：[1]南京航空航天大学能源与动力学院,南京210016

出　　处：《红外技术》2013年第10期623-628,664,共7页Infrared Technology

摘　　要：数值模拟的方法研究了短套管二元引射喷管几何参数(LW、LN和间距比)变化对推力特性的影响,优选出了短套管二元引射喷管几何参数的选取范围,并计算了优选结构下短套管二元引射喷管在3～5 m波段的红外辐射特性,且与轴对称喷管、二元喷管和长套管二元引射喷管进行了对比。排气系统的流场采用了商用软件计算,红外辐射特征采用了自主开发的软件(NUAA-IR)进行计算。结果表明:短套管二元引射喷管相对长套管二元引射喷管具有更好的推力特性和红外抑制效果。The thrust characteristics of two-dimensional ejector nozzle with short shroud are studied with variational geometry parameter. The best parameters are selected. Then the infrared radiation characteristics in the waveband of 3-5μm are studied, and compared with axisymmetric nozzle, 2D nozzle and 2D ejector nozzle with long shroud. The flow field of the exhaust jet was calculated with commercial software. The infrared radiation characteristics were calculated with an IR analysis software（NUAA-IR）developed by our research group. The results show that the 2D ejector nozzle with short shroud is better than the 2D ejector nozzle with long shroud on the thrust characteristics and infrared radiation characteristics.

关 键 词：短套管二元引射喷管 推力特性 红外辐射特性 几何参数 

分 类 号：V231.1[航空宇航科学与技术—航空宇航推进理论与工程]