摘要
以Fluent 6.3为平台,采用局部非热平衡模型,对紊流及紊流过渡区范围内骨架发热多孔介质竖直通道内的非达西强制对流换热进行了数值模拟。采用三维N-S方程及标准k-ε湍流模型描述多孔介质内的流动,详细研究了孔隙有效雷诺数Re(400<Re<2000),表面热流密度q(q=5、30和90 kW/m2)和冷却剂入口温度Tin(Tin=20、50和80℃)的变化对多孔介质流道内流动阻力及换热特性的影响。结果表明:低热流密度下,表面热流密度的变化对流动阻力和换热系数的影响很小;小球直径对换热系数的影响显著,且随着雷诺数的增加而增加;换热系数随冷却剂入口温度的增加而减小。
With Fluent 6.3 serving as a platform,a partial heat non-equilibrium model was adopted to numerically study the non-Darcian forced convection heat exchange in the vertical passages of a skeleton heat generation porous medium in a turbulent flow zone and its transition one.Three-dimensional N-S equation and standard k-ε turbulent flow model were used to depict the flow inside the porous medium.On this basis,the influence of the change in the pore effective Reynolds number Re(400<Re<2000),surface heat f...
出处
《热能动力工程》
CAS
CSCD
北大核心
2010年第6期614-616,684-685,共5页
Journal of Engineering for Thermal Energy and Power
