板壳式换热器传热与流动特性研究

Study of the Heat Transfer and Flow Characteristics of a Plate and Shell Heat Exchanger

对圆形板片板壳式换热器内的传热流动特性进行了数值模拟及实验研究。采用SOLIDWORKS软件对单个流道进行了无简化、全尺度的实体建模,采用ICEM软件进行了网格划分,采用FLUENT软件进行求解,并通过中试规模的水—水传热实验来验证模拟结果。实验样机采用与数值模拟几何结构完全相同的板片,板片数目122片。通过对比发现,在雷诺数Re为200-7 000的范围内,数值模拟结果与实验结果误差在15%以内。模拟结果可以作为该类产品工业应用中设计选型及优化的依据。

A numerical simulation and experimental study were performed of the heat transfer and heat exchange characteristics of a round plate and shell heat exchanger. By using the software Solidworks,a full scale real-entity model for a single flow passage was established during the numerical simulation without any simplification,dividing the grid by employing the software ICEM and seeking solutions by adopting the software Fluent. In addition,the simulation results were verified through a pilot-scale water-water heat transfer test. The prototype machine for the test used the plates fully identical to the geometrical structure during the numerical simulation with the number of the plates being 122.Through a comparison,it has been found that when the Reynolds number is in a range from 200 to 7 000,the error between the numerical simulation results and the test ones is within 15%. The simulation results can be used as an underlying basis for type selection and optimization during design of the products of the same kind in industrial applications.