DOI：10.11883/bzycj-2021-4058不同初始压力下可爆预混气体通过波纹板阻火器的淬熄特性研究*张炼卓，闫兴清，吕先舒，喻健良，李通征，詹潇兵（大连理工大学大学化工学院，辽宁大连116024）摘要：阻火器是一种应用广泛的爆炸阻隔装置。为了深入理解影响阻火器性能的因素，通过实验方法探究了不同初始压力下可爆预混气体通过波纹板阻火器的淬熄特性。结果表明，可燃气的活性、体积分数和初始压力均会影响火焰速度稳定性、传播模式以及淬熄难度。实验发现火焰传播具有3种模式：直接淬熄、穿过阻火单元后逐渐淬熄、淬熄失败。可淬熄的最大初始压力plim用以表征火焰淬熄难度，虽然其最小值位于化学计量比，但仍在一定体积分数范围内保持恒定。此外，基于传热作用得到密闭管道中丙烷-空气预混气爆燃阻火速度公式，并进行了实验验证。关键词：波纹板阻火器；预混火焰；淬熄；初始压力；火焰速度中图分类号：O389;TQ569国标学科代码：13035文献标志码：AOnquenchingcharacteristicsofcombustiblepremixedgasthroughacrimped-ribbonflamearresteratdifferentinitialpressuresZHANGLianzhuo,YANXingqing,LYUXianshu,YUJianliang,LITongzheng,ZHANXiaobing(SchoolofChemicalEngineering,DalianUniversityofTechnology,Dalian116024,Liaoning,China)Abstract:Thecrimpedflamearresterisacommondisasterpreventionandcontroldevice.Mostoftheresearchfocusesonthehigher-pressureworkingconditionsinsteadofthepressurelowerthan0.1MPawhenitappliesinspecialareasorenvironments.Thispaperexploresthequenchingcharacteristicsofdifferentcombustiblegas-airmixturespassingthroughcrimpedribbonflamearrestersatdifferentinitialpressurestoreplenishthelow-pressureprotectiontestandunderstandthefactorsaffectingtheperformanceoftheflamearresterdeeply.TheexperimentswerecarriedoutintheDN80circularpipe.Andthecrimpedribbonplateslitchannelwithacross-sectionofanapproximatelyequilateraltriangleis38mmlongand0.8mmhigh.Theexperimentalgasesarepremixedpropane-airwithavolumefractionof4.2%andpremixedethylene-airwithdifferentconcentrationsobtainedaccordingtothepartialpressuremethod.Theignitionvoltageis10kV.Itisfoundthattheactivity,concentration,andinitialpressureofcombustiblegaswillaffectthestabilityofflamevelocity,propaga...
