《轴流风机扇叶的仿真与分析毕业论文》由会员分享，可在线阅读，更多相关《轴流风机扇叶的仿真与分析毕业论文（61页珍藏版）》请在金锄头文库上搜索。
1、摘 要轴流风机与常用的离心风机相比是一种大流量低扬程的风机。因其结构简单、使用方便，它在汽车领域中发挥了巨大作用。轴流风机内部流场的研究，为掌握轴流风机空气动力性能及优化风机的过流部件提供了可靠的依据；对改善风机性能提出有效的方法，对国民经济的发展也有着极其深远的意义。本论文正是针对上述问题，通过 CFD 方法对轴流风机内部流场进行三维数值模拟，得到流体的速度矢量及压力分布，分析扇叶产生的流场，为提高风机性能的作了一定的探索性研究。在探索性研究中，我们采用了流场从整体到局部的分析方法。在初步明确了风机各部分对扇叶流场及风机性能的影响后，重点对风机的关键零件扇叶进行了比较细致的分析。本课题的主要
2、研究内容为：1、详细研究了在实际风洞实验状态下的流场，结合风机测试方法选用了与测试状态接近的边界条件；2、研究了风机各部分对扇叶流场及风机性能的影响，得出扇叶是影响的主要因素的结果，确定了以扇叶流场为重点的研究对象；3、详细研究了我公司 QS1304 风扇扇叶周围气体在实验状态下的流场，并提出了改进方案，同时完成了扇叶的实验特性与仿真特性的对比分析；4、通过对改进前后的扇叶进行扇叶送风的实验，对比实验数据与模拟计算结果，初步证明了本文数值模拟方法的正确性与可行性，并基于本文分析的结果提出了一些有助于以后扇叶设计的意见和建议；5、研究了扇叶在工作状态下的简单变形分析和简单模态分析。关键词：关键词
3、：轴流风机，扇叶，流场，CFD，三维数值模拟ABSTRACTIn comparison with common centrifugal fanner, axial-flow fanner has a bigger flux and lower lift. It plays a large role in motor field due to its simple structure and convenient management. The study on the inner flow field of the axial-flow fanner will provide reliable
4、 evidences to the fanners air dynamic performance and to the optimization of the flow-passed parts. The effective method to improve the fanners performance also has deep significance for the development of country economics.Aiming to above problem, this paper makes use of 3D numerical simulation on
5、inner flow field in axial-flow fanner by CFD method to obtain the flow velocity vector and pressure distribution and, basing on the analysis of the flow field of the fan lamina, then proceed some exploring studies for improving the performance of the fanner. In the exploring studies, we adopt global
6、-local analysis method on flow field. After primary ensure the affections of fanners parts to the flow field and fanners performance, we emphasis on the key part fan lamina to detail analysis.The main contents include: 1. Study the flow field detailly under the real wind tunnel experimental conditio
7、n during which, with combination of fanner experimental methods, we select appropriate boundary condition close to experimental status; 2. Study the affections of fanners parts to the flow field and fanners performance and result that the fan lamina is the main factor;3. Study the flow field of QS13
8、04 fan lamina of our Corporation under the experimental status, thus, provide an improved scheme and, simultaneously, carries out the computation and comparative analysis between the fans experimental specialities and simulated specialities; 4. From the wind experiments of the pre- (original) fan la
9、mina and post- (improved) fan lamina, the comparison between the experimental data and simulated computational results verifies the validity andfeasibility of the numerical simulation method in the paper. Basing on the analysis results, we propose some suggestions to the future fan lamina design.5.
10、Study the simple form changing analysis and simple structural analysis of the fan lamina on work status.Keyword: Axial-flow fanner, fan lamina, flow field, CFD, 3D numerical simulation 目录摘摘 要要.IABSTRACT.II目录目录.IV第一章第一章 概概 述述.11.1 本课题的目的和意义.11.2 轴流风机的研究的现状.11.3 CFD 及其在轴流风机设计中的应用.21.4 解决本课题的基本思路.4第二章第二章 轴流风机一般设计理论轴流风机一般设计理论.52.1 轴流通风机的一般结构.52.2 风机的性能参数及相关名词.52.3 轴流风机扇叶传统设计所采用的假定.72.4 轴流风机常用设计方法.7第三章第三章 基本物理模型基本物理模型.93.1 流体动力学控制方程.93.1.1 质量守恒方程.93.1.2 动量守恒方程.93.1.3 能量守恒方程.103.1.4 组分质量守恒方程.113.2 三维湍流模型.113.2.1 湍流模型理论简史.123.2.2 几种典型的湍流数值模拟方法及湍流模型简介.
