摘要目前，燃气轮机作为舰船用动力装置已经成为一种潮流和发展方向。本文的研究对象即是作为船用燃气轮机重要组件之一的进气系统。而要保证舰船燃气轮机高效运行，进气段在加油的过程中首先要满足其后燃机在不同工作状态下做功所需要的空气流量，保证实现船用燃机在不同工况下的张力所输出的扭矩，即必须保证一定大小的出口速度。为使出口速度满足运行要求，本文进行了燃气轮机进气系统的设计和内部流场的数值模拟，以雷诺平均N-S方程为控制方程，选择标准的 模型为湍流模型，通过Gambit 画出模型并划分网格，再运用Fluent软件计算出结果，研究了不同入口速度对出口速度的影响，比较了不同入口截面下出口速度的不同，得出结论。为设计出高性能的船用燃气轮机进气系统提供了一定的依据。61698
毕业论文关键词 船用燃气轮机 进气系统 数值模拟 Gambit Fluent
毕业设计说明书（论文）外文摘要
Title Numerical Simulation of the Gas Turbine Inlet System
Abstract As so far,it has become a tendency that lots of large naval are equipped with gas turbine.The research object of this paper is the inlet system which is one of the important components of gas turbine in the ship.To ensure the efficient operation of marine gas turbine,inlet system must meet the needed combustion air flow in different working conditions when the engine is in the process of refueling.So we need to increase the outlet velocity in order to ensure the realization of gas turbine output torque under different conditions.the inlet system models of gas turbine are designed and some numerical simulations are carried on according to the operating requirements mentioned above.Reynolds-averaged N-S equations are chosen as the control equations,model selection criteria are chosen as the turbulence model. We use Gambit to draw the model and the mesh,then we use Fluent to calculate the resulte. This paper studies the effects of different entrance velocity on the outlet velocity and compares the different outlet velocity under different entrance section.Then we draw the conclusion for the design of gas turbine.
Keywords Marine gas turbine Inlet system Numerical simulation
1 绪论 1
1.1 本课题的意义 1
1.2 舰船燃气轮机进气系统的历史和现状 1
1.2.1 舰船燃气轮机简介 1
1.2.2 进气系统装舰问题 2
1.3 国内外关于数值模拟的研究 4
1.4 本文的主要研究工作 6
2 进气系统结构模型建立 6
2.1 进气系统的结构 6
2.2 进气系统特性参数分析 7
2.3 进气道流动类型的确定 8
2.4 控制方程及湍流模型 9
2.4.1 可压缩粘性流动的N-S方程 9
2.4.2 湍流模型 10
2.5 网格的划分 12
2.6 数值计算方法 12
2.6.1 有限容积法（FVM） 12
2.6.2 SIMPLE算法 13
3 数值计算结果分析 14
3.1 计算模型的确立 Fluent燃气轮机进气过程的数值模拟:http://www.751com.cn/zidonghua/lunwen_67572.html