流体二次引射推力转向参数影响规律

采用数值模拟手段,对流体二次引射推力转向参数影响规律进行了研究。首先采用二元矩形矢量喷管,结合风洞试验及国外文献计算数据,验证了自主开发的流体推力转向数值模拟软件的可靠性;在此基础上,开展了流体二次引射推力转向的机理研究和各种参数影响规律数值模拟研究,并详细研究了不同主次流压比、引射缝隙位置和缝隙宽度等参数对干扰流场结构及推力转向偏角的影响,获得了各设计变量对喷管性能及内部流态的影响规律,给出了流体二次引射实现推力转向的基本设计原则及较优的参数组合方案,相关结论可为流体二次流引射推力矢量喷管设计提供依据。

Influence of Parameters on Secondary Fluidic Thrust Vectoring

The influence of parameters on the secondary fluidic thrust vectoring is simulated with computational fluid dynamics methods. Firstly, a rectangular nozzle is simulated via MFlow solver, and the solver is validated by comparing the computed results, the experimental data and the literature results. On this basis, the influence law of various parameters, such as pressure ratio of the main flow and secondary flow, position and width of the ejecting gap, on the secondary fluidic thrust vectoring is analyzed. Finally, valuable data and meaningful conclusions are obtained, which are helpful to the design of the exhaust nozzle for fighter planes.