Numerical Investigation of High Pressure and High Reynolds Diffusion Flame Using Large Eddy Simulation  

作　　者：Ali Lohrasbi Nichkoohi Abolghasem Mesgarpour Tousi 

机构地区：[1]Department of Aerospace Engineering-Amirkabir University of Technology-Center of Excellence in Computational Aerospace Engineering-Tehran-Iran

出　　处：《Journal of Thermal Science》2014年第5期412-421,共10页热科学学报（英文版）

摘　　要：Today,with nonstop improvement in computational power,Large-Eddy Simulation(LES) is a high demanding research tool for predicting engineering flows.Such flows on high pressure condition like diesel engines is extensively employed in ground and marine transportation,oblige the designer to control and predict toxic pollutants,while maintaining or improving their high thermal efficiency.This becomes one of the main challenging issues in decades.In the present work,numerical investigation of diffusion flame dynamics is performed in the near-field of high-Reynolds jet flow on high pressure condition encountered in diesel engine applications.This work discusses the implementation of Partially Stirred Reactor(PaSR) combustion model by the approaches of large eddy simulation(LES).The simulation results show that LES,in comparison with Reynolds-Averaged Navier-Stokes(RANS) simulation predicts and captures transient phenomena very well.These phenomena such as unsteadiness and curvature are inherent in the near-field of high Reynolds diffusion flame.The outcomes of this research are compared and validated by other researchers' results.Detailed comparisons of the statistics show good agreement with the corresponding experiments.

关 键 词：large eddy simulation-non premixed combustion-flame dynamics-diffusion flame-high Reynolds flow-diesel engine 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]