激波绕射双方块加速诱导爆轰的数值研究

推进技术 ›› 2011, Vol. 32 ›› Issue (2): 287-291.

激波绕射双方块加速诱导爆轰的数值研究

孙晓晖,陈志华,张焕好,薛大文

南京理工大学瞬态物理重点实验室,江苏南京 210094;南京理工大学瞬态物理重点实验室,江苏南京 210094;南京理工大学瞬态物理重点实验室,江苏南京 210094;南京理工大学瞬态物理重点实验室,江苏南京 210094

发布日期:2021-08-15
作者简介:孙晓辉(1985—),男,博士生,研究领域为新概念发动机。E-mail:huizi123717@163.com

Numerical investigations on detonation induced by diffracted shock waves of double square obstacles

National Key Lab. of Transient Physics, Nanjing Univ. of Science and Technology, Nanjing 210094,China;National Key Lab. of Transient Physics, Nanjing Univ. of Science and Technology, Nanjing 210094,China;National Key Lab. of Transient Physics, Nanjing Univ. of Science and Technology, Nanjing 210094,China;National Key Lab. of Transient Physics, Nanjing Univ. of Science and Technology, Nanjing 210094,China

Published:2021-08-15

摘要/Abstract

摘要： 基于二维单步化学反应Euler方程,应用Roe/HLL混合格式以及自适应网格加密(AMR)技术,对方管中弱激波绕射双方块障碍物加速诱导爆轰现象进行了数值研究。计算结果表明,弱激波与双方块相互作用并发生绕射、碰撞可有效加速诱导爆轰,且在管道阻塞比为45%左右时可达到最佳效果,与相关实验结果相符。另外,研究了方块个数及排列方式对激波绕射加速诱导爆轰的影响,得到了最佳方块数量与方块排列方式。

关键词: 爆轰;燃烧;方块障碍物;胞格结构 

Abstract: Based on the one-step chemical reaction Euler equations, the high resolution hybrid Roe/HLL scheme and the AMR (Adaptive mesh refinement) method are employed to study the phenomenon of detonation induced by the collisions of the diffracted shock waves when the shock wave passes around double square obstacles in the tube filled with combustible gases. Our numerical results show that, due to the interactions between the weak shock wave and the two cubes, the shock waves diffract, and their collisions and focuses can initiate the detonation, and with the blockage ratio of about 45%, the best effect for the detonation induction can be obtained, which agrees well with experimental results in the literatures. Furthermore, the effects of square numbers and their arrangements inside the tube on the detonation induction have been investigated numerically, the optimum square numbers and their arrangements have been obtained.

Key words: Detonation; Combustion; Square obstacle; Cellular structure

孙晓晖,陈志华,张焕好,薛大文. 激波绕射双方块加速诱导爆轰的数值研究[J]. 推进技术, 2011, 32(2): 287-291.

参考文献

[2] Brown C J, Thomas G.Experimental studies of ignition and transition to detonation induced by the reflection and diffraction of shock waves[J].Shock Waves, 0,0(1):23-32.
[3] Vadim N Gamezo, Takanobu Ogawa, Elaine S Oran.Deflagration-to-detonation transition in premixed H₂-air in channels with obstacles[R].AIAA 2007-1172.
[4] Witt de B, Ciccarelli G, Zhang F, et al.Shock reflection detonation initiation studies for pulse detonation engines[R].AIAA 2004-3747.
[5] 王春,张德良,姜宗林．多障碍物通道中激波诱导气相爆轰的数值研究[J]．力学学报,6,8(5):586-592.
[6] 韩启祥,戈雯,王家骅．激波绕射触发爆震波的试验研究[J]．航空动力学报,7,2(11):1803-1807.
[7] 滕宏辉,吕俊明,姜宗林．可燃气体中激波与障碍物作用在下游形成爆轰波的数值研究[J]．爆炸与冲击,7,7(3):251-258.
[8] Warnecke G.Analysis and numerics for conservation laws[D].Berlin:Springer, 2005:69-92.
[9] Berger M, Colella P.Local adaptive mesh refinement for shock hydrodynamics[J].J.Comput.Phys, 8,2:64-84.
[10] Geβner T.Dynamic mesh adaption for supersonic combustion waves modeled with detailed reaction mechanisms[D].Fakultt: University Freiburg, 2001.
[11] 孙晓晖,陈志华,张焕好．弱激波碰撞加速诱导气相爆轰研究[C]．成都:第十四届中国空气动力学物理气体动力学学术交流会,2009.
[12] 王昌建,徐胜利．直管内胞格爆轰的基元反应数值研究[J]．爆炸与冲击,5,5(5):405-416.
[13] 郑殿峰,王家骅,张会强,等．扰流片对汽油/空气脉冲爆震发动机爆震波压力的影响[J]．推进技术,4,5(6):549-552.(ZHENG Dian-feng, WANG Jia-hua, ZHANG Hui-qiang, et al.Efects of parameters of turbulence generator on the detonation wave in air-breathing gasoline-air pulse detonation engine[J].Journal of Propulsion Technology, 4,5(6):549-552.)