Fuel Property Effects on Liquid and Vapor Penetrations of Evaporating Sprays  

作　　者：赵博林 陈谦斌 

机构地区：[1]University of Michigan-Shanghai Jiao Tong University Joint Institute,Shanghai Jiao Tong University

出　　处：《Journal of Shanghai Jiaotong university(Science)》2018年第1期33-37,共5页上海交通大学学报（英文版）

基　　金：the Third Round"985 Project"Through the University of Michigan-Shanghai Jiao Tong University Joint Institute(No.TS0321337001)

摘　　要：The purpose of this study is to investigate the effect of fuel properties on liquid and vapor penetrations in evaporating spray systems. A recently developed model, which can simultaneously account for the finite thermal conductivity, finite mass diffusivity and turbulence effects within atomizing multi-component liquid fuel sprays, is utilized for the numerical predictions. Two different multi-component fuels with different boiling temperatures,densities and other thermal properties are implemented in the KIVA-3V computational fluid dynamics(CFD)code to study the evaporation behaviors. A six-component surrogate fuel is used to emulate the relevant volatility property of the real diesel fuel, and a second bi-component fuel is chosen to represent a low boiling-temperature fuel. The numerical results are compared with the experimental data, and the representative results are obtained.For a lower density and lower boiling temperature fuel, the liquid penetration length is shorter. However, the vapor penetration lengths are not affected by the fuel type in terms of fuel volatility. Available experimental data are used for validation and appraisal of the multi-component evaporation model.The purpose of this study is to investigate the effect of fuel properties on liquid and vapor penetrations in evaporating spray systems. A recently developed model, which can simultaneously account for the finite thermal conductivity, finite mass diffusivity and turbulence effects within atomizing multi-component liquid fuel sprays, is utilized for the numerical predictions. Two different multi-component fuels with different boiling temperatures,densities and other thermal properties are implemented in the KIVA-3V computational fluid dynamics（CFD）code to study the evaporation behaviors. A six-component surrogate fuel is used to emulate the relevant volatility property of the real diesel fuel, and a second bi-component fuel is chosen to represent a low boiling-temperature fuel. The numerical results are compared with the experimental data, and the representative results are obtained.For a lower density and lower boiling temperature fuel, the liquid penetration length is shorter. However, the vapor penetration lengths are not affected by the fuel type in terms of fuel volatility. Available experimental data are used for validation and appraisal of the multi-component evaporation model.

关 键 词：evaporating spray multi-component fuel fuel effects liquid length vapor penetration 

分 类 号：TK01[动力工程及工程热物理]