Calculation on Cylinder Pressure Fluctuation by Using the Wave Equation in KIVA Program

查看全文 作　　者：WEI [1]Haiqiao;WEI [1]Jingsi;SHU [1]Gequn

机构地区：[1]State Key Laboratory of Engines,Tianjin University,Tianjin 300072,China

出　　处：《Chinese Journal of Mechanical Engineering》索引2012年第25卷第2期,共8页

基　　金：supported by National Natural Science Foundation of China (Grant No. 50706032 and No. 50476065);PhD Programs Foundation of Ministry of Education of China (Grant No. 20070056011) 摘　　要：Cylinder pressure fluctuation during combustion process of internal combustion engine is closely related to combustion noise and knock.The current studies are based on cylinder pressure test to obtain information on combustion noise and knock,but there is little for simulation of combustion pressure fluctuation.Based on effects of combustion process in the combustion chamber on cylinder pressure by using wave equation,the mechanism of pressure fluctuation during combustion is researched with three-dimensional acoustic wave equation and flow field model of KIVA program.The cylinder pressure fluctuation curve,temperature field and acoustic field are obtained from the coupled calculation of the wave equation and KIVA program.The frequency spectrum analysis is taken with the cylinder pressure oscillation of cylinder pressure measured and calculated.The calculation result is consistent with the experimental result.This indicates that the cylinder pressure fluctuation can be correctly calculated with the wave equation.Analysis of calculation results of temperature field and acoustic field shows that sound field changes faster than flame propagates,and distribution of sound field is more complicated.Combustion pressure oscillation in the diesel engine is under highly unstable condition.This indicates that the combination of cylinder pressure fluctuation model and combustion model is an effective method to study the pressure oscillations and a new method to study the combustion noise and knock. 关键词：KIVA程序气缸压力压力波动波动方程耦合计算程序使用燃烧噪声声场分布

相关文献

参考文献（28）
引证文献（5）
耦合文献（48）

参考文献(28)

引证文献(5)

耦合文献(48)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Calculation on Cylinder Pressure Fluctuation by Using the Wave Equation in KIVA Program

参考文献(28)

引证文献(5)

耦合文献(48)

用户提示