Experimental investigation and numerical analysis on high-efficiency shock vectoring control serpentine nozzles

作     者：Hui, Zhonghao Shi, Jingwei Lin, Wentao Zhou, Li Wang, Zhanxue Liu, Yongquan 

作者机构：Northwestern Polytech Univ Sch Power & Energy Xian 710072 Peoples R China Natl Key Lab Sci & Technol Adv Light Duty Gas Turb Xian 710129 Peoples R China Collaborat Innovat Ctr Adv Aeroengine Beijing 100191 Peoples R China 

出 版 物：《CHINESE JOURNAL OF AERONAUTICS》 (Chin J Aeronaut)

年 卷 期：2024年第37卷第12期

页      面：296-324页

核心收录：

学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0802[工学-机械工程] 0825[工学-航空宇航科学与技术] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Funds for Distinguished Young Scholars of Shaanxi Province, China [52376032, 52076180] National Science and Technology Major Project, China [2021JC-10] Fundamental Research Funds for the Central Universities, China [J2019-II-0015-0036] 501XTCX2023146001 

主　　题：Shock vectoring control Serpentine nozzle Auxiliary injection Thrust vectoring performance Flow control 

摘      要：The high-efficiency Shock Vectoring Control Serpentine Nozzle (SVCSN) takes into account both thrust vectoring and infrared stealth, and significantly improves the comprehensive performance of the aero-engines through an additional auxiliary duct. In this paper, the schlieren photographs at the exit of the high-efficiency SVCSN and the wall static pressure distributions were obtained by experiments, and the numerical results were used to enrich the thrust vectoring characteristics. The effects of the auxiliary injection were analyzed first to reveal the advantages of the high-efficiency SVCSN compared to the conventional SVCSN. Then, the aerodynamic parameters and the structural parameters of the high-efficiency SVCSN were investigated, including the Nozzle Pressure Ratio (NPR), the Secondary flow Pressure Ratio (SPR), the secondary flow relative area and the secondary flow injection angle. Finally, the coupling performance of the high-efficiency SVCSN is studied by using the approximate modeling technology. Results show that the auxiliary injection increases the range between the two shock legs of the k shock wave induced by the secondary flow, then causes the separation zone and high-pressure boss of the down wall to expand upstream, and finally results in a prominent increase in the thrust vectoring performance. The thrust vectoring angle and Vectoring Efficiency (VE) of the high-efficiency SVCSN are about 61.6% and 75.7%, respectively, higher than those of the conventional SVCSN at NPR = 6. The effects of the NPR and the SPR on the thrust vectoring performance of the high-efficiency SVCSN are coupled with each other. A larger NPR matched with a smaller SPR shows better thrust vectoring performance. The maximum fluctuations in thrust vectoring angle and VE caused by the NPR and SPRare about 22% and 64%. The VE decreases monotonously with the increase of the secondary flow relative area. Smaller secondary flow injection angle shows better thrust vector performan