斜爆轰波黏性流场和起爆演化的数值研究  

Numerical study on viscous flow field and initiation evolution of oblique detonation waves

作　　者：杨理 岳连捷[2,3] YANG Li;YUE Lianjie(School of Aeronautics,Chongqing Jiaotong University,Chongqing 402247,China;State Key Laboratory of High-Temperature Gas Dynamics,Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China;School of Engineering Sciences,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]重庆交通大学航空学院,重庆402247 [2]中国科学院力学研究所高温气体动力学国家重点实验室,北京100190 [3]中国科学院大学工程科学学院,北京100049

出　　处：《航空动力学报》2025年第2期354-362,共9页Journal of Aerospace Power

基　　金：国家自然科学基金(U2141220,11672309);重庆市教育委员会科学技术研究计划青年项目(KJQN202200739)。

摘　　要：为探究黏性效应对斜爆轰波波阵面的影响,认识斜爆轰波(ODW)起爆过程的特性,基于高分辨率求解器,开展斜劈诱导斜爆轰波的无黏/有黏数值计算。研究表明:有黏计算条件下惰性斜激波的波角值明显大于无黏计算,同时耦合下游分离泡的影响,使得斜激波后诱导点火长度减小。由于有黏计算中壁面上分离泡的分离/再附激波自身具有不稳定性,分离/再附激波与斜爆轰波波阵面作用更易促使类胞格结构形成。斜爆轰波的起爆可认为是由斜激波诱导的燃烧波与斜激波碰撞引发的,形成的斜爆轰波继而在三波点牵引下向外膨胀;燃烧波强度对最终准稳态流场中强过驱斜爆轰波区域尺度有明显影响。To investigate the influences of viscous effects on the oblique detonation wave(ODW)front,and discern the essential characteristic for the evolution of ODW initiation,an inviscid/viscous simulation was conducted with a high-resolution numerical solver to study the wedge-induced ODW.It was manifested that the wave angle of inert oblique shock wave(OSW)for viscous computation was larger than that for inviscid computation,which contributed to a short induction ignition length behind OSW with consideration of the influence of separation bubble downstream.For viscous simulation,owing to the unsteady characteristics of the separation/attachment shock wave aligned to the separation bubble on the wall,the cellular-like structures of ODW front appeared more quickly.The initiation of ODW was triggered by the collision between shock-induced combustion and OSW,and ODW expanded outward subjecting to the triple-point;especially,the strength of the combustion wave had a significant influence on the scale of strong overdriven ODW region in quasi-steady flow field.

关 键 词：斜爆轰波 黏性效应 波阵面 激波诱导燃烧 起爆 

分 类 号：V231[航空宇航科学与技术—航空宇航推进理论与工程]