Abstract: The flow and heat transfer under the constant heat flux condition of fluid′s outside the tube forced laminar flow along the tube axis in a quadrate tube-shell type heat exchanger fitted with porous metal foam in shell side was theoretically analyzed. It shows that the flow velocity distribution in the radial direction is similar to the situation of fluid′s internal turbulent flow inside a blank tube with the feature of having great gradient in a very thin layer near to the wall and more flat in the rest area. The temperature distributions of fluid and foam are more flat. The increasing of the pressure drop of the fluid with the ppi（pore per inch）number of the porous metal foam was faster than that of the Nusselt number of the convection heat transfer. The pressure drop and the Nusselt number were increased with the decreasing of the porosity of the porous metal foam.

Key words: Porous metal foam    ,  Tube-shell heat exchanger     ,  Flow    ,   ,  Heat transfer

摘要： 对管间填充多孔泡沫金属的方形管壳式换热器内流体沿管间轴向强制层流的流动和恒热流密度的
传热进行了理论研究。结果表明,流体的径向速度分布呈现类似于光管内湍流时近壁处薄层内变化率大,其余大部
分区域平坦的特征;流体和泡沫的径向温度分布较为平坦;流体的压力降随泡沫孔数(ppi)增大的增长明显大于对流
换热的Nu 数随ppi数增大的增长;泡沫的孔隙率越小,流体的压力降越大,对流换热的Nu 数也越大。

关键词: 多孔泡沫金属   ,   , 管壳式换热器  ,  , 流动  ,  , 传热