南京航空航天大学学报（英文版）2023，Vol.40Issue(1)：13-24,12.
后甲板对S弯激波矢量喷管流动特性的影响
Influence of Aft Deck on the Flow Characteristics of a Serpentine Shock Vector Control Nozzle
摘要
Abstract
A convergent-divergent serpentine shock vector controlling nozzle can significantly reduce the infrared and electromagnetic radiation intensity of the engine tail, and realize the thrust vector control in the pitch direction of supersonic aircraft, which greatly enhances the stealth and maneuverability of the aircraft. As the nozzle with a rectangular outlet needs to be integrated with the rear fuselage, one side wall is usually extended as an aft deck, so that the deflection rule of the tail jet is different from that under the symmetrical nozzle outlet. In this paper, numerical simulation is used to compare the flow characteristics of serpentine shock vector controlling nozzle with and without an aft deck, and then the influences of the aft deck length and angle on the performance of serpentine shock vector controlling nozzle with an aft deck are studied respectively. The results show that under certain working conditions, the oblique shock wave induced by secondary flow injection from the upper wall will be reflected from the aft deck, which is not conducive to the generation of downward thrust vector angle. When there is no open separation of the aft deck surface, the outflow from the lower wall will flow along the aft deck surface, so the increase of the length or angle of the aft deck will deflect the jet velocity axis downward.关键词
后甲板/S弯喷管/推力矢量喷管/激波矢量控制/流动特性Key words
aft deck/serpentine nozzle/thrust vectoring nozzle/shock vector controlling/flow characteristic分类
信息技术与安全科学引用本文复制引用
梁爽,史经纬,王占学..后甲板对S弯激波矢量喷管流动特性的影响[J].南京航空航天大学学报（英文版）,2023,40(1):13-24,12.基金项目
The authors would like to acknowl-edge the following people for their assistance:WANG Wen-jie,SUN Peng,QI Min,YE Yifan,HAO Wang,JIAO Liying,YANG Yuming,ZHANG Ziyu,LIN Zhifu,MENG Yubo,HUI Zhonghao,SHI Jie,all with the Jet Propulsion Research Laboratory,School of Power and En-ergy,Northwestern Polytechnical University. （）
