氢气/空气非预混旋转爆轰波形成与传播特性  

Formation and propagation characteristics of hydrogen/air nonpremixed rotating detonation wave

作　　者：金杉 孟庆洋 赵宁波[1] 郑洪涛[1] 李智明[1] JIN Shan;MENG Qingyang;ZHAO Ningbo;ZHENG Hongtao;LI Zhiming(College of Power and Energy Engineering, Harbin Engineering University, Harbin 150001, China)

机构地区：[1]哈尔滨工程大学动力与能源工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2021年第3期361-367,共7页Journal of Harbin Engineering University

基　　金：中央高校基本科研业务费专项资金项目(HEUCFP201719).

摘　　要：针对非预混旋转爆轰波的形成与传播问题,本文通过三维数值模拟分析了氢气与空气的冷态掺混特性、爆轰波传播模态的演变规律和结构特点及其对进气过程的影响。计算结果表明:由于回流区的存在,燃料与氧化剂能够快速掺混均匀,在燃烧室进口附近,内壁面的当量比大于外壁面。透射激波多次对撞后最终形成一道压力较高的激波。爆轰波的传播方向与透射激波对撞后的切向速度和反应速率有关。爆轰波稳定传播时沿外壁面传播,内壁面为激波,气体受激波压缩,温度高于爆轰波后气体的温度。爆轰波使氧化剂与燃料喷注存在时间差,从而影响气体掺混特性。In order to study the formation and propagation characteristics of a non-premixed rotating detonation wave,the non-reacting mixing process of hydrogen and air,the evolution regularity of detonation wave propagation mode and the structural features and effects of the detonation wave on the injection process are discussed by three-dimensional numerical investigations.The numerical results show that the recirculation zone makes fuel and oxidant quickly mix with each other.Near the inlet of the combustor,the equivalence ratio near the inner wall is higher than that near the outer wall.Additionally,multiple collisions of transmitted shocks finally result in the formation of a high-pressure wave.The propagating direction of the detonation wave is related to the tangential velocity and reaction rate of the reactant after transmitted shock collision.Moreover,the rotating detonation wave propagates close to the outer wall while the shock wave propagates near the inner wall when the wave becomes stable.The reactant is compressed by the shock wave and the temperature of the reactant is higher than that following the detonation wave.The detonation wave in the combustor leads to an injection time difference between fuel and oxidizer,affecting the mixing performance.

关 键 词：旋转爆轰 掺混 非预混 喷注 当量比 流场特性 自持传播 数值模拟 

分 类 号：V231.2[航空宇航科学与技术—航空宇航推进理论与工程]