横掠椭圆管的换热及流动特性分析

Study on the Heat Transfer Characteristics and Flow Behaviors of the Elliptic Tube in Crossflow

利用隐式有限差分法,对横掠不同轴径比a/b情况下的椭圆管换热及流动特性进行了研究。得到了边界层内速度分布和边界层厚度发展状况。讨论了a/b对边界层分离点的影响。得到了不同管型椭圆管的局部对流换热分布规律,并与圆管和平板绕流进行了比较。

Heat transfer characteristics and flow behaviors of the elliptic tube with different axis ratio a/b are numerically studied via an implicit finite difference method. The velocity distribution in the boundary layer and the thickness of boundary layer along the tube surface are obtained. The effect of the ratio a/b on the separation point of boundary layer is discussed. The distribution law of local convective heat transfer of different elliptic tubes and compared with the results of a circular tube and a flat plate.