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内燃机燃烧过程中高频压力震荡的热声耦合机理

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Indexed by:期刊论文

Date of Publication:2014-01-01

Journal:内燃机学报

Included Journals:Scopus、EI、PKU、ISTIC、CSCD

Volume:32

Issue:5

Page Number:454-459

Key Words:内燃机; 燃烧; 热声耦合; 压力振荡

Abstract:内燃机运转过程中,燃烧室的容积不断地发生变化,燃烧室内的燃烧源分布也随之变化,因而燃烧过程中缸内压力的高频振荡是很复杂的过程.KIVA
   软件结合SYSNOISE声学软件,建立燃烧室内热声耦合引起的压力场变化模型,定量分析了缸内压力的高频振荡过程.模拟计算多点燃烧激励状态下的燃烧室
   内压力波的传播过程,模拟结果与试验结果较吻合.模拟计算较好地体现燃烧室内某个位置的压力振荡过程,以及分析造成压力振荡的主要声源特性.结果表明:燃
   烧放热与燃烧室声场存在相互影响,压力波传播必须考虑声学的迟滞效应.

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