摘要本文运用了CFD方法对圆柱绕流问题进行了数值模拟，研究了雷诺数、瑞利数和振 动频率对流动和传热的影响。通过软件建立模型、划分网格，再使用fluent软件通过设置 参数，首先求解了在静止圆柱下，绕流的流动及传热特征，研究了雷诺数和瑞利数对结 果的影响，描述了绕流物理现象，得到速度矢量图和温度分布图，并通过数值模拟的结 果分析漩涡的脱落，圆柱升力、阻力系数的变化，并将结果数据与公认实验结果进行对 比；然后运用动网格求解了振动圆柱下，圆柱振动频率和振幅对流动和传热的影响，得 到可靠的分析结果，并将结果与相关文献进行了验证，验证了数值模拟结果的有效性。81197

毕业论文关键词 圆柱绕流 阻力、升力系数 动网格 弹性光顺法 局部重生法

Title Numerical Simulation of Flow And Heat Transfer In A Vibrating Cylinder

Abstract Flow over a circular cylinder is studied numerically using the technique of CFD method by the study,in which the effects of Reynolds number, Rayleigh number and vibration frequency on the flow and heat transfer were studied。I build the model and pide mesh by the software and then use the FLUENT software setting parameters。 Firstly, the flow and heat transfer characteristics of the flow over a stationary cylinder are solved。 The effects of Reynolds number and Rayleigh number on the results are studied, and the flow physical phenomenon is described, and the velocity vector diagram and temperature distribution map are obtained。And the results of numerical simulation analysis of vortex shedding, cylinder rise, drag coefficient of change, and compare the data and the experimental results。 And then the effects of frequency and amplitude on flow and heat transfer are solved through dynamic mesh, and the results are analyzed。 The results are verified by the relevant literature, and the validity of the numerical simulation results is verified。

Keywords Flow over a circular cylinder drag and lift coefficient dynamic mesh Spring smoothing method  local re-meshing method

本科毕业设计说明书 第 I  页

目 次

1 绪论 1

1。1 前言 1

1。2 计算流体动力学（CFD）的发展与应用 1

1。3 本文研究目的和主要工作 3

2 数学模型 4

2。1 控制方程 4

2。2 参数定义 4

2。3 模型建立及求解 4

2。3。1 网格划分 4

2。3。2 参数自变量设置 5

3 静止圆柱绕流和传热数值模拟 6

3。1 不同雷诺数的数值模拟 6

3。1。1 雷诺数对流动的影响