NumericalStudyonSupersonicPremixedMixturesDetonation

Journal of Propulsion Technology ›› 2015, Vol. 36 ›› Issue (12): 1761-1767.

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NumericalStudyonSupersonicPremixedMixturesDetonation

ScienceandTechnologyonScramjetLaboratory，NationalUniversityofDefenseTechnology，Changsha410073，China,ScienceandTechnologyonScramjetLaboratory，NationalUniversityofDefenseTechnology，Changsha410073，China,ScienceandTechnologyonScramjetLaboratory，NationalUniversityofDefenseTechnology，Changsha410073，China and ScienceandTechnologyonScramjetLaboratory，NationalUniversityofDefenseTechnology，Changsha410073，China

Published:2021-08-15

超声速预混气扩张流道热射流起爆研究

陈伟强,梁剑寒,林志勇,蔡晓东

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

作者简介:陈伟强(1989—)，男，硕士生，研究领域为高超声速推进技术。
基金资助:
国家自然科学基金(NSFC91016028；NSFC51206182)。

Abstract

Abstract: Inordertoobtainabetterunderstandingofthemechanismofdetonationinitiationinsupersonicpremixedmixturesusingasustaininghotjet，theadaptivemeshrefinementprogramAMROCwasadoptedtosim.ulatethedetonationinitiationinsupersonicH2/Airpremixedcombustiblemixturesin5.4°expandedchannel.Theresultsshowthatthecontinualhotjetwithawidthof4.0mmcaninitiatethedetonationin140μsintheexpandedchannelsuccessfully.Thedetonationwavepropagatesforwardinthespeedof59.9m/s.Theoverdrivendegreeis

Key words: Detonationinitiation；Hotjet；Supersonicpremixedmixtures；Expandedchannel

摘要： 为深入理解超声速预混气射流起爆过程机理，采用块结构自适应网格加密程序AMROC，在并行计算系统中模拟单边扩张流道中H2/Air超声速预混气在持续热射流作用下的爆震起爆过程。结果表明，5.4°扩张流道上方的4mm宽度热射流在140μs时间内成功起爆了超声速预混可燃气；形成的爆震波前传速度为55.9m/s，过驱度只有1.059，接近为CJ状态的爆震波；扩张壁面使得射流诱导形成的弓形激波出现分离激波，分离激波与弓形激波相交导致弓形激波波后温度的升高，从而加速了爆震波面的形成；在扩张壁面的作用下，射流起爆的爆震波面更接近于CJ爆震波面。

关键词: 爆震起爆；热射流；超声速预混气；扩张流道中图分类号:V231文献标识码:A文章编号:1001-4055(2015)12-1761-07DOI:10.13675/j.cnki.tjjs.2015.12.001

CHENWei-qiang,LIANGJian-han,LINZhi-yong,CAIXiao-dong. NumericalStudyonSupersonicPremixedMixturesDetonation[J]. Journal of Propulsion Technology, 2015, 36(12): 1761-1767.

陈伟强,梁剑寒,林志勇,蔡晓东. 超声速预混气扩张流道热射流起爆研究[J]. 推进技术, 2015, 36(12): 1761-1767.

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NumericalStudyonSupersonicPremixedMixturesDetonation

超声速预混气扩张流道热射流起爆研究

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