浓度梯度对T型管中爆轰波传播特性的影响  

Effect of Concentration Gradient on Detonation Wave Propagation Characteristics in T-tube

作　　者：姜超 潘剑锋[1] 李剑星 倪靖 Jiang Chao;Pan Jianfeng;Li Jianxing;Ni Jing(School of Energy and Power Engineering,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]江苏大学能源与动力工程学院,镇江212013

出　　处：《燃烧科学与技术》2022年第2期177-182,共6页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目(51976082,91641113,KYCX20_3022).

摘　　要：针对爆轰波在浓度梯度作用下衍射、熄爆到再起爆过程,基于开源软件OpenFOAM研究了两种不同混合气在3种不同浓度梯度下流场特征.结果表明:随着浓度梯度增大,横向爆轰波强度会减弱,爆轰波更易解耦.前导激波与浓度梯度相互作用会使爆轰波面发生弯曲,并且改变横向爆轰波和马赫杆的传播过程.对于稳定气体(H_(2)/O_(2)/Ar),爆轰波在管长范围内没有成功起爆;对于不稳定气体(C_(2)H_(4)/O_(2)),爆轰波成功起爆.To study the effect of concentration gradient on detonation wave diffraction,detonation quenching and re-initiation in a T-tube,the flow field characteristics under two mixtures with three concentration gradients were analyzed based on the open source software OpenFOAM.Results show that the strength of the transverse detonation decreases and detonation is more likely to quench with the increase in the concentration gradient.The interaction between the leading shock and the concentration gradient makes the detonation front bend and changes the propagation process of transverse detonation wave and the Mach stem.For a stable mixture(H_(2)/O_(2)/Ar),the detonation cannot reinitiate,while the detonation successfully reinitiate for an unstable mixture(C_(2)H_(4)/O_(2)).

关 键 词：浓度梯度 爆轰波 胞格结构 OPENFOAM 

分 类 号：TK16[动力工程及工程热物理—热能工程]