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中文摘要：
以多孔介质发动机为背景，用数值模拟方法考察气缸内加入多孔介质蓄热体后对燃烧室内湍流流场及混合气形成的影响。计算基于Antohe和Lage的适用于多孔介质的k—ε模型，其中引入了Darcy项和Forchheimer项。建立了一种可描述多孔介质随机结构的简化模型。针对燃油喷雾在不同结构多孔介质内的流场进行了数值计算。计算表明，多孔介质结构对燃烧室内燃油液滴的蒸发和混合气的形成过程具有重要的影响。
英文摘要：
The effects of a porous media heat regenerator inserted into a combustion chamber on the turbulent flow field and fuel-air mixture formation are studied by numerical simulations. Computations are based on the k- ε turbulence model of Antohe and Lage, into which a Darcy term and Forchheimer term are introduced. A simplified model describing random structures of porous media is presented. Numerical computations are performed for the turbulent flows induced by a fuel spray in the PM of different structures. Calculation results show that the structure has substantial influence on the vaporization of fuel droplets and the fuel-air mixing process.
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