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

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