齿型螺旋肋片管表面局部放热系数  

LOCAL HEAT TRANSFER COEFFICIENT OF A HELICALLY SEGMENTED FINNED TUBE SURFACE

作　　者：李瑞阳[1] 卓宁[1] 

机构地区：[1]华东工业大学动力系,上海200093

出　　处：《化工学报》1994年第4期465-469,共5页CIESC Journal

摘　　要：对齿型螺旋肋片管管束内部沿管表面周的局部放热系数进行了研究。采用试验与数值计算相结合的方法，求得不同角度的局部放热系数，并通过数据拟合，给出Ｒｅ＝２×１０＾４－８×１０＾４范围内的肋管表面平均放热系数和按周分布的局部放热系数的计算式。An investigation on the local heat transfer coefficient of a helically segmented finned tube surface in a tube bundle was conducted by experiment in cooperation with numerical calculation. In the experiment, the thermal couples were embedded only at an angle with the tube to be tested, then the temperature distribution around the tube was measured by revolving the tube under a certain experimental condition. On the basis of the experiment, the local heat transfer coefficients at different angles of the test tube surface for different experimental conditions were obtained by solving a set of two- dimensional finite difference equations. The results were fitted and the correlation equations for predicting the average and local heat transfer coefficients for helically finned tube in the tube bundle over the experimental range of Re = 20000-80000 were presented.

关 键 词：螺旋肋片管 对流传热 换热器 

分 类 号：TQ051.503[化学工程]