基于AVL-FIRE的GPF性能仿真研究

利用仿真软件FIRE对汽油机颗粒捕集器（GPF）的工作过程进行模拟，研究了进气流量、载体孔目 数、尾气温度、载体长度等参数对GPF压降、过滤效率等工作特性的影响.结果表明：减小GPF的进气流量会 有效地降低载体前后的压降；提高载体的孔目数，GPF的前后压降会变大，内部温度和流速会相应降低，但可 以提高捕集效率；增加载体长度，可以提高捕集效率，但内部压降值和温度也会增大.
ThedimensionalcapturemodelofGPFissetupbyusingCFDsoftwareFIREandtheworkingprocessofthe GPFwassimulated.GPFpressuredropandfiltrationefficiencywerethemaincharacters,theywouldbeinfluencedby theparametersofGPFincludetheinletflowrate,thenumberofholesandlength.Thesimulationresultindicatesthatre? ducingtheGPFinletflowcaneffectivelyreducepressuredropofthecarrierandbyraisingthenumberofholes,GPF pressuredropwillbebigger,internaltemperatureandflowratewillbereduced,butcanimprovetheefficiencyofcap? ture.ByincreasingthelengthoftheGPF,captureefficiencyimproved,buttheinternalpressuredropvaluesandtempera? turealsoincreased.