Numerical investigation of dynamic characteristics of dual throat nozzle and bypass dual throat nozzle in thrust vectoring starting process  

作　　者：Yuqi ZHANG Jinglei XU Minglei CAO Ruifeng PAN Shuai HUANG 

机构地区：[1]Key Laboratory of Inlet and Exhaust System Technology of Ministry of Education,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China [2]College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China [3]State Key Laboratory of Mechanics and Control of Aeronautics and Astronautics Structures,Nanjing 210016,China

出　　处：《Chinese Journal of Aeronautics》2024年第10期184-206,共23页中国航空学报（英文版）

基　　金：the continued support of Key Laboratory of Inlet and Exhaust system Technology (Nanjing University of Aeronautics and Astronautics), China;Ministry of Education, National Science and Technology Major Project of China (Nos. 2017-V-0004-0054, 2019-II-0007-0027, Y2022II-0005-0008);Defense Industrial Technology Development Program of China (No. JCKY2019605D001);Advanced Jet Propulsion Creativity Center of AEAC of China (No. HKCX2020-02-011);China Postdoctoral Science Foundation (No. 2022M721598);Jiangsu Funding Program for Excellent Postdoctoral Talent of China (No. 2022ZB214);the Youth Fund Project of Natural Science Foundation of Jiangsu Province of China (No. BK20230891);the National Natural Science Foundation of China (No. 12332018);Science Center for Gas Turbine Project, China (P2022-B-I-006-001) and some other related foundations

摘　　要：The Bypass Dual Throat Nozzle(BDTN)is a novel fluidic Thrust Vectoring(TV)nozzle,it switches to TV state by opening the valve in the bypass.To greatly manipulate the BDTN,the dynamic characteristics in the TV starting process should be analyzed.This paper conducts numerical simulations to grasp the variation processes of performances and the flow field evolution of BDTN and Dual Throat Nozzle(DTN).The dynamic responses of TV starting in typical DTN models are investigated at first.Then,the TV starting processes of BDTN in different Nozzle Pressure Ratio(NPR)conditions are simulated,and the valve opening durations(T)are also considered.Before the expected TV direction is achieved in the DTN,the jet is deflected to the opposite direction at the beginning of the dynamic process,which is called the reverse TV phenomenon.However,this phenomenon disappears in the BDTN.The larger injection width of DTN intensifies unsteady oscillations,and the reverse TV phenomenon is strengthened.In the BDTN,T determines the delay degree of performance variations compared to the static results,which is called hysteresis effect.At NPR=10,the hysteresis affects the final stable performance of BDTN.This study analyses the dynamic characteristics in DTN and BDTN,laying a foundation for further design of nozzles and control strategies.

关 键 词：Dual Throat Nozzle(DTN) Bypass Dual Throat Nozzle(BDTN) Dynamic characteristic Thrust vectoring starting process Cavity vortex Hysteresis effect 

分 类 号：V231[航空宇航科学与技术—航空宇航推进理论与工程]