基于CFD的U型管换热器温度降模型  

Temperature decreasing model of U pipe heat exchanger based on CFD

作　　者：刘红[1] 杨哲人[1] 蒋兰芳[2] 陈斐奇[1] 

机构地区：[1]浙江工业大学机械工程学院,浙江杭州310014 [2]浙江工业大学之江学院,浙江杭州310024

出　　处：《食品与机械》2015年第2期152-156,共5页Food and Machinery

摘　　要：换热器是烟熏炉的重要组成部分,但是换热器的实际设计很多情况下依赖于经验与之后的实验验证。如何有效地简化换热器的设计成为一项重要的课题。研究主要基于Fluent平台对U型管换热器进行仿真模拟,以探索U型管换热器热交换原理。通过研究U型管的结构特点,将一层U型管作为一基本单元;对基本单元进行仿真分析,将所得的数据进行数值拟合,得出U型管入口温度、层数以及出口温度之间的函数关系,从而建立U型管层数与出口温度之间的温度降数学模型。该函数可以有效地反映出U型管换热器温度降的趋势,为实际设计提供理论借鉴。Heat exchanger is an important part of fumigation oven.However,in many cases,the actual design of fumigation oven is depended on experience and experimental verification after the design.So,how to simplify the design of fumigation oven has been an important issue.Based on fluent software platform,this research explored the heat exchange mechanism of U pipe heat exchanger by the simulation of U pipe heat exchanger.By considering the structure characteristics of U pipe,a layer of U pipe is used as a basic unit.The basic unit is simulated and the data get in the simulation is numerical fitted Then a function of inlet temperature of U pipe,the layer number of U pipe and the temperature of outlet is get,and a temperature decreasing mathematical model of the layer number and the temperature of outlet is built.The function can reflect the trend of the temperature decreasing efficiently,so it provide a theoretical reference for actual design.

关 键 词：换热器 U型管 FLUENT 数值拟合 

分 类 号：TQ051.5[化学工程]