二元引射喷管几何特征参数对推力及红外特性的影响  

Impact of geometry parameters on the thrust and infrared radiation characteristics of two-dimensional ejector nozzle

作　　者：刘福城[1] 吉洪湖[1] 林兰之[1] 黄伟[1] 刘常春[1] 斯仁[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：《航空动力学报》2011年第6期1244-1250,共7页Journal of Aerospace Power

摘　　要：采用数值模拟的方法研究了二元引射喷管间距比变化和面积比变化对推力特性和35μm波段红外辐射特性的影响.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（NU-AA-IR）进行计算.结果表明：间距比变化和面积比变化对二元引射喷管的推力系数和引射流量比有不同程度的影响.在小方向角范围内,间距比和面积比的变化对宽边探测平面上的积分辐射强度影响较大,最大降幅为30%左右,而对窄边探测平面上的积分辐射强度影响较小;二元引射喷管相对于二元喷管的红外辐射特性最大降幅为50%左右.The thrust and infrared radiation（IR） characteristics in the waveband of 35 μm of two-dimensional（2-D） ejector nozzle were studied numerically.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 spacing ratio and area ratio have different impacts on the thrust ratio and mass-flow ratio of the 2-D ejector nozzle.Spacing ratio and area ratio have greater impact on wide detected plane within a small azimuth angles.In relation to a 2-D nozzle,the integral IR intensity of a 2-D ejector nozzle can be reduced about 50%.

关 键 词：二元引射喷管 间距比 面积比 推力特性 红外辐射 

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]