几何偏转角度对矢量喷管推力特性的影响  

Influence of geometrical deflection angle on thrust characteristics of vector nozzle

作　　者：冯瑞强 李晓明[1] 王宇天 FENG Ruiqiang;LI Xiaoming;WANG Yutian(Aviation University of PLA Air Force, Changchun 130000, China)

机构地区：[1]中国人民解放军空军航空大学,长春130000

出　　处：《兵器装备工程学报》2022年第5期158-164,共7页Journal of Ordnance Equipment Engineering

摘　　要：为了研究矢量喷管几何偏转角度对发动机特性的影响规律,利用SST k-ω两方程湍流模型对矢量喷管在设计状态和非设计状态下的定常湍流流场进行了数值计算,分析不同几何偏转角度下矢量喷管的流动状态和内特性参数。结果表明:随着几何偏转角度的增加,气流流动方向随之偏转,喷管内部出现气流分离,气动矢量角增大,流量减少,合成推力和轴向推力降低,法向推力增加。气动矢量角和法向推力与喷管几何偏转角度呈线性关系,合成推力和轴向推力与喷管几何偏转角度呈非线性关系,在有偏航方位角的情况下,侧向推力与喷管几何偏转角度呈非线性关系。In order to study the influence of geometric deflection Angle of vector nozzle on engine characteristics,SST k-ωtwo-equation turbulence model was used to numerically calculate the steady turbulent flow field of vector nozzle in design state and off design state,and analyze the flow state and internal characteristic parameters of vector nozzle at different geometric deflection angles.The results show that with the increase of the geometric deflection angle,the flow direction was deflected,the flow separation occurred in the nozzle,the aerodynamic vector Angle increased,the flow rate decreased,the synthetic thrust and axial thrust decreased,and the normal thrust increased.The aerodynamic vector angle and normal thrust have a linear relationship with the nozzle deflection angle,while the synthetic thrust and axial thrust have a nonlinear relationship with the nozzle deflection angle.In the case of yaw azimuth,the lateral thrust has a nonlinear relationship with the nozzle deflection angle.

关 键 词：矢量喷管 偏转角度 发动机特性 数值模拟 

分 类 号：V231.3[航空宇航科学与技术—航空宇航推进理论与工程]