摘要：本课题主要研究对象是应用在地暖中的温控节流阀，本课题不涉及到温度的变化，只研究节流阀的性能，例如节流阀的流阻特性和流场。课题在已有的基础上，通过对节流阀实验分析和理论模拟进行比较，验证理论的可行性，然后在理论的基础上对节流阀的结构进行优化，从而提高节流阀的性能，例如压降和流阻特性ξ。实验采用正交设计法，同时做PIV实验，在节流阀的实验中很少有人用到PIV实验，这点比较新颖。理论模拟部分是三文流体的CFD模拟，利用ANSYS软件进行fluent模拟。根据前人的论文可以了解到，CFD流体模拟在阀体研究中很常见，但是经过查阅一系列节流阀的相关文献后发现没有将实验与理论模拟结合起来的课题。本课题的最终目的是优化节流阀的结构，提高节流阀的性能，优化方案主要从流道结构方面入手。37167
毕业论文关键词：节流阀；流场；PIV；CFD；压降；流阻特性
Experimental analysis and theoretical simulation of throttle valve flow field
Abstract： the main object of this paper is applied in the warm temperature control throttle valve， this topic is not related to temperature changes， only to study performance of the throttle valve， such as throttle valve of the flow resistance characteristics and flow field． Subject on the basis of existing through of throttle valve on the experimental results and the theoretical simulations are conducted to compare， verify the theoretical feasibility of， then in theory based on the throttle valve structure optimization， so as to improve the performance of the throttle valve， such as pressure drop and flow resistance characteristics of zeta． The experiment uses the orthogonal design method， while doing PIV experiment， in the throttle valve experiment， few people use PIV experiment， this is relatively new． The theoretical simulation is CFD simulation of three-dimensional fluid， and fluent simulation by ANSYS software． According to the previous paper can understand， the CFD simulation is common in the valve，but after reviewing the related literatures of a series of throttling valve and found no will combine the subject of experimental and theoretical simulation． The ultimate goal of this thesis is to optimize the structure of the throttle valve， improve the performance of the throttle valve， and optimize the structure of the main flow from the structure of the channel．
Keywords： throttle valve；flow field；PIV；CFD；pressure drop； flow resistance characteristic 
目录
1绪论    1
1.1 课题背景与意义    1
1.2 文献综述    2
1.2.1 节流阀阀芯优化设计    2
1.2.2 节流阀流场分析与模拟    2
1.2.3 PIV技术    3
1.2.4 节流阀的国外研究进展    4
1.2 课题陈述    4
1.2.1 研究内容    4
1.2.2 研究方案    5
1.3 预期创新点    5
2 节流阀流场实验方案    6
2.1 实验目的    6
2.2 实验设备    6
2.3 实验内容    7
2.3.1实验内容    7
2.3.2实验方法    8
2.4 PIV实验    8
2.4.1 PIV实验原理与实验流程    9
2.4.2 PIV实验系统    9
2.4.3 PIV实验注意事项    9
2.5实验步骤    10
2.6实验注意事项    10
2.7实验结果    10
2.8 PIV实验失败原因    11
3 节流阀理论模拟    12
3.1流体动力学基础    12
3.1.1流体动力学相关方程    12 fluent节流阀流场的实验分析与理论模拟+CAD图纸:http://www.youerw.com/jixie/lunwen_35860.html