回热式多孔介质发动机的多维数值模拟  

NUMERICAL STUDY ON COMBUSTION PROCESS IN A REGENERATIVE POROUS MEDIUM ENGINE

作　　者：周磊[1] 解茂昭[1] 赵治国[1] 史俊瑞[1] 

机构地区：[1]大连理工大学能源与动力学院,辽宁大连116024

出　　处：《工程热物理学报》2008年第3期511-514,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.50476073)

摘　　要：回热式发动机利用多孔介质回热器在气缸中的往复运动,实现气固之间的热交换,促进均匀混合气的形成,从而实现均质和稳定的燃烧.本文利用改进的KIVA-3V程序对Ferrenberg所提出的回热式发动机模型进行了二维数值模拟.发动机以甲烷为燃料,采用了详细的反应机理。通过数值计算讨论了两个主要的工况参数,孔隙率和燃料喷射量对发动机燃烧温度的影响。计算模拟表明,多孔介质的孔隙率越大,甲烷的喷射量越多,气缸内的高温区域也最大.In the regenerative engine effective heat exchange between gas and solid can be achieved by the reciprocating movement of a porous medium regenerator in the cylinder, which promotes considerably the fuel-air mixture formation and a homogeneous and stable combustion. In this paper A two-dimensional model for the regenerative engine proposed by Ferrenberg is presented based on a modified version of the engine CFD software KIVA-3V. The engine is fueled with methane and a detailed kinetic mechanism is used. Attention is focused on the influence of two relevant parameters, i.e. the porosity of porous media and fuel mass rate on the combustion characteristics. Results show that the combustion region with high temperature is enlarged with increasing porous medium porosity and the fuel mass rate.

关 键 词：回热式发动机 多孔介质 KIVA-3V 数值模拟 

分 类 号：TK402[动力工程及工程热物理—动力机械及工程]