Flame Structure of Methane and Kerosene Combustion with a Compact Concave Flame-Holder using the LES-pdf Method  

作　　者：WANG Fang WANG Yunfan WEI Guanyi LIU Denghuan JIN Jie JONES P.William 

机构地区：[1]School of Energy and Power Engineering,Beihang University,Beijing,Beijing 100191,China [2]Department of Mechanical Engineering,Imperial College London,London SW72AZ,UK

出　　处：《Journal of Thermal Science》2024年第1期222-234,共13页热科学学报（英文版）

基　　金：National Science and Technology Major Project (2017-Ⅰ-0004-0005);National Natural Science Foundation of China (91741125)。

摘　　要：Compact flame-holders for afterburners are an increasing requirement for modern aero engines.However,flame-holder design is non-trivial since high inlet temperatures,velocities,and elaborate structures induce complex turbulence,combustion,and spray coupling in modern afterburners.In this work,the LES-pdf and stochastic fields-Lagrangian particle spray methods are used to investigate methane and aviation kerosene combustion structures formed by new-type concave flame-holders.The flow pattern,combustion mode,and flame structure of gaseous and liquid fuel around a concave flame-holder are analyzed,discussed,and compared with experimental results.Results reveal that the flame stability of a concave flame-holder is better than that of the non-concave one.Furthermore,when using liquid fuel,the concave flame-holder forms a stable and compact flame.These results suggest concave flame-holders are a promising design for compact afterburners.

关 键 词：concave structure flame-holder LES-pdf spray combustion flame structure AECSC 

分 类 号：V231.2[航空宇航科学与技术—航空宇航推进理论与工程]