摘要热管的传热能力和范围非常大。在生产及生活中，应用很多，因此它可以在市场上各种形形色色的元件中，脱颖而出。

对重力热管的模拟是一个非常复杂的过程。重力热管内部涉及到气液两种状态，气态的水蒸气和液态的水。本文研究对象为重力热管，对重力热管开展数值模拟研究。在数值模拟的过程中，人为的将重力热管划分为三部分。从上至下依次为绝热、冷凝、蒸发。在这三段中，会发生非常复杂的传热过程。在数值模拟之前，要对重力热管的传热原理做一个基本的了解。要弄清在传热过程中，涉及到复杂的传热方程。并且内部的流体也是在不断流动的，不断地进行着转换，因此对于流体的方程，必须要做一些了解。在运算结果时，要知道模型采用的算法，以及控制方程的离散问题。在用软件建立模型的过程中，涉及到Gambit软件和Fluent软件的使用。首先要利用Gambit软件初步画出模型的大致轮廓。然后对其进行网格划分，并且设置边界条件。采用商用软件Fluent对画出的模型进行分析。由于本课题在研究过程中，涉及到液态水的蒸发沸腾问题。故在实验过程中采用UDF程序，对参数做一些基本的设置。84873

本课题在数据该分析时，采用制作表格的形式从划分的三段采取了不同形式的对比。并且实验对比了在三种不同入口功率和三种不同充液率情形下，水流速度分布云图、蒸汽体积比例分布云图、压力分布云图、温度分布云图、速度矢量图的情况。并做了一些分析，提出了数值模拟过程中遇到的问题及解决办法。

毕业论文关键词：重力热管； 数值模拟； 充液率； 热流量

Abstract By studying this subject, we look forward to gravity heat pipe design and optimization of a certain significance。

Heat capacity and range of the heat pipe is very large。 In the production and life, a lot of applications, so it can be on the market various kinds of elements, stand out。 The problem is that energy issues have been around around us。 Heat pipe is widely used, to a certain extent, ease the energy to bring our pressure。 Make our resources more fully applied。

Simulate gravity heat pipe is a very complex process。 Gravity inside the heat pipe related to the gas-liquid two states, water vapor and liquid gaseous。 This study is the gravity heat pipe, numerical simulation for gravity heat pipe。 We are in the process of simulation, the artificial gravity heat pipe is pided into three parts。 Top to bottom for the heat insulation, condensation, evaporation。 In three sections, it is very complex heat transfer process occurs。 Before simulation, we want the principle of gravity heat pipe heat transfer to make a basic understanding。 To understand the heat transfer process, involving complex heat transfer equation。 And the internal fluid is constantly flowing, constantly engaged in conversion, so the fluid equation, we are also very necessary to do something about。 When the operation result, to know the algorithm model uses discrete problem, and the control equation。 In the modeling software in the process involves the use of software Gambit and Fluent software。 We must first use the software Gambit draw preliminary model we need。 Gambit software and then use mesh and set boundary conditions。 Fluent use software to do some calculations。 Because this issue in the course of the study, involving the evaporation of liquid water boiling problems。 So the use of UDF program during the experiment, the parameters do some basic settings。

In this study the data analysis, making use of the form, from the pision of three sections take different forms contrast。 And experimental comparison of the situation in three different power inlet and three different scenarios filling rate, flow velocity contours, steam volume fraction contours, contours pressure, temperature contours, velocity vector graphics。 And do some analysis, we made some improvements。