CFD换热器综合实验平台的换热及压降分析

摘要套管式换热器具有结构紧凑、传热强度大等特点。本文对实验台中的套管式换热器进行传热和压降特性的研究，具体工作为：（1）基于实验台，在不同工况下进行实验，计算出传热系数和压降，并且分析热、冷水进口流量和温度对其换热性能和压降的影响；（2）使用 CFD 对套管式换热器进行三维物理建模，对 4 种不同网格节点间距进行模拟，获取最佳网格节点间距，并模拟在实验条件下换热器的换热系数和压降，分析流量对热、冷水出口截面出的压降、速度和温度分布云图的影响，同时对不同壁面温度进行模拟，解释实验中得出结果；（3）模拟 6 种不同的流动方式，并在最佳流动方式下对 5 种不同外管直径建模，优化设计实验台中的套管式换热器。 80199

毕业论文关键词套管式换热器 CFD 数值模拟优化设计

毕业设计说明书外文摘要

Title Analysis of Heat Transfer and Pressure Drop of the heat exchanger Performance Test Bench

Abstract Double pipe heat exchanger has the characteristics of compact structure, high heat transfer intensity and so on。 Studies of the heat transfer and pressure drop characteristics of the double pipe heat exchanger on heat exchanger performance test bench in this article, specifically as follows: (1) Based on heat exchanger performance test bench, experiment under different conditions, calculation the heat transfer coefficient and pressure drop, analyzing the effects of inlet flow and temperature of hot and cold water on the heat transfer performance and pressure drop; (2) Use CFD to build a three dimensional modeling of the double pipe heat exchanger, simulate four different grid node spacings of model and get the best spacing, simulate the heat transfer coefficient and pressure drop of the heat exchanger under the experimental conditions。 Analyze the influence of flow rate on the pressure drop, velocity and temperature distribution of hot and cold water outlet section。 Meanwhile, simulating the different temperature of wall of the model, then explaining the results obtained in the experiment。（3）Simulation of six different flow patterns, building five different tube diameters models under the optimal flow pattern。 Optimal design double pipe heat exchanger of the heat exchanger performance test bench。

Keywords double pipe heat exchanger CFD numerical simulation optimal design

本科毕业设计说明书第 I 页

1 绪论 1

1。1 研究背景 1

1。2 套管式换热器的原理及其特性 2

1。3 套管式换热器的研究现状 3

1。4 本文研究内容 4

2 套管式换热器数值模拟 5

2。1 数学模型 5

2。2 湍流模型 6

2。3 本章小结 7

3 套管式换热器的传热特性实验 CFD换热器综合实验平台的换热及压降分析:http://www.youerw.com/wuli/lunwen_93068.html