进气掺氢对爆轰波参数影响的试验研究

ExperimentalStudyofEffectsofHydrogenAdditiononDetonationWaveParameters

关键词:  脉冲爆轰发动机  爆轰波  燃烧转爆轰  氢气中图分类号:V238文献标识码:A文章编号:1001-4055(2015)12-1915-06DOI:10.13675/j.cnki.tjjs.2015.12.023

Key words:  Pulseddetonationengine  Detonationwave  Deflagrationtodetonationtransition  Hydrogen

摘要:

为研究氢气对气液两相脉冲爆轰发动机内爆轰参数的影响，对进气掺氢的脉冲爆轰发动机进行了试验研究，实现了发动机的稳定工作。研究发现，进气中掺混氢气对爆轰波参数有较大影响，氢气进气压力为0.1MPa时，掺氢后爆轰波的峰值压力和速度均明显提高，爆轰波速度由1045.9m/s升高至1846.2m/s，发动机尾部位置上爆轰峰值压力从1.9MPa上升至4.5MPa，爆轰波后平台压力提高了0.2～

Abstract:

Toinvestigatetheeffectsofhydrogenonthedetonationwaveparameters，theexperimentalstudywasconductedforthegas-liquidpulsedetonationenginewithhydrogenadditionandthestableworkingpro.cessofpulsedetonationenginewasachieved.Theexperimentalresultsshowthatthehydrogenadditionhassignif.icantinfluenceonthedetonationwaveparameters，thedetonationpressureandvelocityincreaseobviouslywithhydrogeninletpressureof0.1MPa，thedetonationwavevelocityincreasesfrom1045.9m/sto1846.2m/s，andthedetonationpeakpressurealsoincreasesfrom1.9MPato4.5MPaattheexitofthePDE.Meanwhile，thedeto.nationplatformpressureincreasesby0.2~0.6MPa.Thedetonationvelocityincreaseswhenthehydrogeninletpressurerisingfrom0.1MPato0.22MPa.Thedistanceofdeflagrationtodetonationtransitioncanbeshortenwithhydrogenaddition.Thedetonationwavecanbefullydevelopedinpulsedetonationenginewithfewerobstacles(5obstades)withhydrogenaddition，thustheDDTdistancecanbereduced，butwhenthenumberofobstaclesislessthanfive，thepulsedetonationenginecannotworkregularly.Theexperimentalresultsarehelpfultoim.provethecomprehensiveperformanceofthePDE.