乙酸乙酯工质下电场对气泡的作用

摘要：研究电流体动力力学作用下的两相系统中汽泡的行为，从而揭示电流体动力学强化沸腾换热机理，本文对电场作用下汽泡的行为进行了理论研究。从汽泡周围电场分布特性及其受力角度，探究乙酸乙酯工质下不同电场对气泡的作用，最终对沸腾换热的影响进行理论研究。本课题针对均匀电场下汽泡周围电场分布状况进行研究，选用乙酸乙酯作为工质、平行平板电极，其中铜板作为零势面，施加多种直流高压电场，加热方式为电加热方式。利用Ansys计算软件，编程解决汽泡周围场强分布在不同电场情况下的特性，对单个气泡附壁、分离及多个汽泡生成并离时电场分布特性采用数值模仿和剖析。 52408

毕业论文关键词：电流体动力学；气泡；电场特性

Electric Field Acting on The Bubble Under Ethyl Acetate Working Medium

Abstract：Two-phase system under dynamic mechanical study of the role of fluids in the bubble behavior, which reveals the current body dynamics enhancement of boiling heat transfer mechanism, the paper of the electric field bubble conduct theoretical research. From the distribution of the electric field around the bubble characteristics and the force point of view, to explore different electric field on the bubble, the final boiling heat transfer on the theoretical study of the working fluid under ethyl acetate. This paper carried out for the distribution of electric field under uniform electric field around the bubble study, use of ethyl acetate as the working fluid, parallel plate electrodes, where in the copper as a zero-potential surface, applying a variety of DC high voltage electric field, heating to electric heating. Calculated using Ansys software, programming intensity distribution characteristic bubble surrounding field Solving different electric field under a single bubble attached to the wall, and when departing from the plurality of bubble generation and partly from the electric field distribution numerical simulation and analysis.

Keywords：electrohydrodynamics; bubble; electric field characteristic

1绪论 1

1.1 课题选择依据及研究意义 1

1.2 电流体动力学（EHD）强化沸腾传热技术的研究历程 1

1.3 EHD强化沸腾换热的研究现状 2

1.3.1 电场特性对EHD强化沸腾换热的影响 2

1.3.2 工质性质对EHD强化沸腾换热的影响 4

1.3.3 热流密度对EHD强化沸腾换热的影响 5

2电流体动力学强化沸腾换热理论基础 6

2.1 引言 6

2.2 电流体动力学强化传热的优势 6

2.3 电流体动力学强化传热理论基础 7

2.4 电场作用下汽泡的行为变化 10

2.3 汽泡行为的变化对沸腾换热的影响 12

3 ANSYS软件的应用 15

3.1引言 15

3.1.1软件功能简介 15

3.1.2前处理模块PREP7 15

3.1.3求解模块SOLUTION 16

3.2电磁场有限元分析简介 16

3.2.1电磁场基本理论 16

3.2.2电磁场有限元分析 18

3.3有限元法的计算步骤乙酸乙酯工质下电场对气泡的作用:http://www.youerw.com/wuli/lunwen_56284.html