静止可燃气热射流爆震起爆块结构自适应网格加密数值模拟

推进技术 ›› 2014, Vol. 35 ›› Issue (2): 236-243.

静止可燃气热射流爆震起爆块结构自适应网格加密数值模拟

蔡晓东,梁剑寒,林志勇,韩旭,覃慧

国防科学技术大学高超声速冲压发动机技术重点实验室,湖南长沙 410073;国防科学技术大学高超声速冲压发动机技术重点实验室,湖南长沙 410073;国防科学技术大学高超声速冲压发动机技术重点实验室,湖南长沙 410073;国防科学技术大学高超声速冲压发动机技术重点实验室,湖南长沙 410073;国防科学技术大学高超声速冲压发动机技术重点实验室,湖南长沙 410073

发布日期:2021-08-15
作者简介:蔡晓东(1987—),男,博士生,研究领域为高超声速推进技术。E-mail:cai-chonger@hotmail.com
基金资助:
国家自然科学基金 (NSFC91016028)。

Numerical Simulation of Detonation Initiation in Quiescent Combustible Mixtures with Block-Structured Adaptive Mesh Refinement Method

Science and Technology on Scramjet Laboratory, National University of Defence Technology,Changsha 410073, China;Science and Technology on Scramjet Laboratory, National University of Defence Technology,Changsha 410073, China;Science and Technology on Scramjet Laboratory, National University of Defence Technology,Changsha 410073, China;Science and Technology on Scramjet Laboratory, National University of Defence Technology,Changsha 410073, China;Science and Technology on Scramjet Laboratory, National University of Defence Technology,Changsha 410073, China

Published:2021-08-15

摘要/Abstract

摘要： 为了深入认识理解静止可燃气热射流爆震起爆的机理过程,采用块结构自适应网格加密方法的开源程序AMROC,进行二次开发,在LINUX系统中建立小型集群并行计算系统,应用于静止可燃气热射流爆震起爆过程高效精细数值模拟,并根据流场特性划分三个阶段进行分析。结果表明:对于一定条件下的热射流,静止可燃气中的热射流爆震起爆对壁面的依赖性很强,正是通过壁面的反射作用形成局部爆震燃烧；通过左壁面和上壁面的有效二次壁面反射,上壁面处的局部爆震燃烧进一步增强,强化的局部爆震燃烧逐渐向整个等直管道中传播；上壁面和下壁面的局部爆震燃烧同时形成之后,双三波点结构在管壁中来回碰撞碰,形成周期性的稳定爆震燃烧。 

关键词: 自适应网格加密;热射流;爆震起爆;二次壁面反射;双三波点碰撞 

Abstract: In order to obtain a profound understanding of the mechanism of detonation initiation in quiescent combustible mixtures using hot jet, further development for the open-code program AMROC of block-structured adaptive mesh refinement method was adopted for fine structure numerical simulation of detonation initiation in quiescent combustible mixtures with hot jet. Simulations were conducted on a small-scale nested parallel computation system on LINUX platform. The initiation process was specified as three stages and their flow field characteristics were analyzed. Results indicate that for hot jets in certain conditions the initiation process is strongly dependent on the walls of the tube in which reflecting effects induce local combustion and detonation subsequently. With two-time reflection on the head face and the upper wall of the tube, detonation near the upper wall is amplified and spread into the whole channel. When local detonation is formed at both the upper and lower walls, two triple-wave points are generated, and collide between the upper and lower walls inside the tube.Thus a stable periodic detonation wave is formed. 

Key words: Adaptive mesh refinement；Hot jet；Detonation initiation；Two-time wall reflections；Two triple-wave points collision

蔡晓东,梁剑寒,林志勇,韩旭,覃慧. 静止可燃气热射流爆震起爆块结构自适应网格加密数值模拟[J]. 推进技术, 2014, 35(2): 236-243.

CAI Xiao-dong,LIANG Jian-han,LIN Zhi-yong,HAN Xu,QIN Hui. Numerical Simulation of Detonation Initiation in Quiescent Combustible Mixtures with Block-Structured Adaptive Mesh Refinement Method[J]. Journal of Propulsion Technology, 2014, 35(2): 236-243.

参考文献

[1] Lee J H S, Knystautas R, Yoshikawa N.Photochemical Initiation of Gaseous Detonation[J].Acta Astronaut,1978,5(11-12):971-982.
[2] Knystautas R, Lee J H, Moen I,et al.Direct Initiation of Spherical Detonation by a Hot Turbulent Gas Jet[C].UK:Seventeenth Symposium (International) on Combustion, 1979:1235-1245.
[3] Carnasciali F, Lee J H S,Knystautas R,et al.Turbulent Jet Initiation of Detonation[J].Combustion and Flame, 1991,4(1,2):170-180.
[4] Christopher Krok J.Jet Initiation of Deflagration and Detonation [D].California:California Institute of Technology, 1997.
[5] Moen I O, Bjerketvedt D, Engebretsen T,et al.Transition to Detonation in a Flame Jet[J].Combustion and Flame, 1989,5(3,4):297-308.
[6] Brophy C M, Werner L T S, Sinibaldi J O.Performance Characterization of a Valveless Pulse Detonation Engine[R].AIAA 2003-1344.
[7] 于军力,秦亚欣,高歌.射流点火对爆震管中爆燃转爆震影响的实验[J].航空动力学报, 2011,6(5).
[8] 李建玲,范玮,李强,等.火焰射流点火起爆的实验探索[J].燃烧科学与技术,2009,15(5).
[9] 曾昊,何立明,章雄伟,等.横向爆震射流起爆爆震过程的数值模拟[J].应用力学学报,2010,27(3).
[10] 曾昊,何立明,章雄伟,等.入射喷口宽度对环形射流激波聚焦起爆爆震的影响分析[J].空气动力学学报, 2011,29(4).
[11] 曾昊,何立明,章雄伟,等.环形射流喷口位置对激波聚焦起爆的影响[J].推进技术,2011,2(3).(ZENG Hao,HE Li-ming,ZHANG Xiong-wei,et al.Investigation on the Influence of Jets Spout Location on Detonation Initiation Via Imploding Annular Shock Waves[J].Journal of Propulsion Technology,2011,2(3).)
[12] 韩旭,周进,林志勇,等.超声速预混气的热射流起爆过程数值模拟[J].推进技术,2012,3(4):650-656.(HAN Xu, ZHOU Jin, LIN Zhi-yong, et al.Numerical Investigation of Detonation Initiation by a Hot Jet in Supersonic Premix Flow[J].Journal of Propulsion Technology,2012,3(4) :650-656.)
[13] Han Xu, Zhou Jin, Lin Zhi-yong.Experimental Investigation of Detonation Initiation by Hot Jets in Supersonic Premixed Flows[J].Chinese Physics B.,2012,1(12).
[14] Deiterding R.Parallel Adaptive Simulation of Multi-dimensional Detonation Structures[D].Cottbus:Brandenburgischen Technischen Universitt cottbus,2003.
[15] Berger M.Adaptive Mesh Refinement for Hyperbolic Differential Equations[R].STAN-CS-82-924,1982.
[16] Deiterding R.Construction and Application of an AMR Algorithm for Distributed Memory Computers[C].New York: Adaptive Mesh Refinement-Theory and Applications,2005.
[17] John H S Lee.The Detonation Phenomenon[M].USA:Cambridge University Press, 2008.
[18] 林伟,周进,林志勇,等.热射流起爆过程的试验研究[C].三亚:第四届高超声速科技学术会议,2011.