摘要
基于曲率控制设计方法,以某涡喷发动机排气喷管为原型进行了S形喷管的设计;利用CFD软件对不同中心线形式,以及不同喷口形式的S形喷管几何参数对气动力影响进行了数值分析和优化选型。同时,还利用自主开发的软件对喷管在后半球空间内的红外辐射强度进行了数值模拟,研究了喷管出口形状对于喷管红外辐射强度的影响规律。结果表明:按红外抑制效果排列,较好的喷口形状依次是梯形、矩形、椭圆、圆形喷口,梯形喷口S形喷管可使红外辐射峰值缩减60%左右。
Based on curvature control design method, S-shaped nozzle was designed by taking the exhaust nozzle of certain turbine jet as prototype. Numerical analysis and optimized comparison were conducted for the influence of geometric parameter of S-shaped nozzle with different centerline type and differ nozzle exit an aerodynamic force by use of CFD software. Meanwhile, the infrared radiation strength of nozzle in rear semi-spherical space was simulated numerically using the self-developed software. The effect regulation of nozzle exit shape on nozzle infrared radiation intensity is summarized. The results show that the sequence of nozzle shape is ranked as trapezoid, rectangle, ellipse and circle listed according to infrared suppression effect. The trapezoid S-shaped nozzle can reduce about 60% of infrared radiation peak.
出处
《教练机》
2014年第3期29-37,共9页
Trainer
关键词
S形喷管
矩形喷管
梯形喷管
气动性能
红外辐射强度
S-shaped nozzle
rectangle nozzle
trapezoid nozzle
aerodynamic performance
infrared radiation intensity
