空气动力学学报2024，Vol.42Issue(11)：75-85,11.DOI:10.7638/kqdlxxb-2023.0231
超声速来流条件下射流阵列和温度对横向射流流场结构的影响
Effect of jet array and temperature on the flow structures of a transverse jet in supersonic crossflow
摘要
Abstract
Active flow control has a wide range of applications in supersonic/hypersonic missiles,in which transverse jets have demonstrated an excellent performance in the fast response to flow.To address the problem of transverse jets in hypersonic missiles,this study carries out numerical simulations on the effects of the jet array and jet temperature on the flow structures.Firstly,the typical flow structures of a transverse jet are analyzed.The strong interaction between the under-expansion jet and the incoming flow forms a horseshoe recirculation zone in front of the jet,and the fluid passing through the barrel shock and the Mach disk together with the incoming flow forms a counter-rotating vortex pair that can interfere with the downstream shock.As the jet temperature increases,the area of the high-pressure zone increases,and the counter-rotating vortex pair induced by the jet causes stronger interference to the downstream shock,resulting in an enhancement effect on the pitching moment.An array of jets can obviously enhance the pitching moment,but when the jet temperature is high,the bow shock in front of the transverse jet will converge towards the lower surface along the circumference of the missile from both sides.This phenomenon makes the enhancement of the pitching moment weakened,therefore a reasonable jet spacing and temperature should be selected when arranging an array of transverse jets.关键词
横向射流/流动控制/气动特性/射流阵列/温度效应/超声速流动Key words
transverse jet/active flow control/aerodynamic characteristics/jet array/temperature effect/supersonic flow分类
航空航天引用本文复制引用
丁振伟,罗振兵,刘强,周岩,谢玮,刘心怡..超声速来流条件下射流阵列和温度对横向射流流场结构的影响[J].空气动力学学报,2024,42(11):75-85,11.基金项目
国家自然科学基金(12202488,92271110) （12202488,92271110）
国防科技大学科研计划项目(ZK22-30) （ZK22-30）
