基于FLUENT的圆形垂直浮力射流的数值模拟
关键词 浮力射流 Fluent软件 数值模拟 流场变化规律
毕业论文设计论文外文摘要
Title Numerical Simulation of Round Vertical Buoyant
Jet Based on Software Fluent
Abstract
With the rapid development of technology, the jet has been widely applied in the field of engineering technology, such as aerospace, energy and chemical industry, water conservancy and environmental protection etc.. Most jet is not only influenced by gravity in motion, but also by buoyancy effects caused by the jet and the temperature difference (or environmental fluid density difference), those are buoyant jet. The thesis developed
the theoretical model of the unsteady process of interaction between buoyant jet and liquid ,and made numerical simulation about the expansion of the buoyant jet by Fluent software. The solving process included geometry modeling, meshing and setting etc.. The influence of chamber structure、nozzle hole diameter and jet pressure to jet shape has been approached. The change law of parameter, such as pressure，velocity and temperature, in the flow field has been obtained.
Keywords Buoyant jet Fluent software Numerical simulation Change law of the flow field
目 次
1 引言 1
1.1 概述 1
1.2 国内外浮力射流研究现状 2
1.3 本文研究内容 3
2 Fluent软件简介 4
2.1 Fluent的主要特点 4
2.2 Fluent的前置模块 4
2.3 基本分析过程 5
3 模型建立 6
3.1 物理模型 6
3.2 几何模型 6
3.3 边界条件 7
3.4 数学模型 8
4 数值模拟 11
4.1 计算网格 11
4.2 计算模型 11
4.3 渐扩结构数值模拟 13
5 矩形结构数值模拟 20
5.1 压力分布 20
5.2 速度分布 21
5.3 温度分布 22
6 多参数变化对射流扩展过程的影响 23
6.1 渐扩型结构尺寸对射流扩展过程的影响 23
6.2 喷孔直径对射流扩展过程的影响 26
6.3 喷射气压对射流扩展过程的影响 28
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