ANSYS+R124工质作用下电场对气泡的作用
关键词：水电动力学；均匀电场；电场特性；气泡
R124 Refrigerant under the Action of an Electric Field on the Bubble
Abstract：In order to proven the role of the applied electric field for the bubbles. This research
focuses on the numerical simulation of the electric field distribution around the bubble that is
under the uniform electric field .The working fluid used is R124. Ansys is used to simulate the
electric field distribution of the bubble under different uniform electric field .The top plate is
respectively exerted 15kv,20k vand 25kv direct-current high voltage electric field, the
simulations is carried out when a bubble attaches, departs or when the formation with partial
departure of several bubbles. The results indicate that the electric field distribution around the
bubble is no longer uniform .The field strength also is increased with the increase of the applied
direct-current high voltage electric field, and the electric fields of the two sides are enhanced
while near the top and bottom areas the electric fields decrease. As the numbers of bubbles
become more, the effect of electric field on bubbles becomes weaker. So the conclusion is
reached that the electric field distribution around the bubbles will be changed by the electric
field and thus will enhance the effect of EHD.
Key words: electrohydrodynamics; uniform electric field; electric characteristics; bubbles
目 录
目录
1 绪论 . 1
1.1课题选择依据及研究意义 . 1
1.2 国内外发展概况 . 1
1.2.1 国内 . 1
1.2.2 国外 . 2
1.3 强化传热的途径 . 2
1.3.1增强传热系数 3
1.3.2 采用高效能的传热面,增大传热面积 3
1.3.3 加大平均温差 . 3
1.4 强化沸腾传热技术的研究历程 . 3
2 EHD 强化沸腾换热理论基础 . 6
2.1 EHD强化传热机理 . 6
2.1.1 汽泡在电场中所受到的力 . 8
2.1.2 EHD对汽液界面的作用 . 10
2.1.3 EHD对接触角和表面张力的改变 . 11
2.2 EHD强化沸腾换热的基本方程 11
2.2.1 存在一个汽泡的均匀电场分析 12
2.2.2 存在多个汽泡的非均匀电场模拟 12
2.2.3 电场及电场力的数值解 12
2.3 EHD强化沸腾换热的数学模型 . 13
3 ANSYS 软件应用 15
3.1 ANSYS软件简介 15
3.2 ANSYS软件功能 15
3.2.1 前处理 15
3.2.2 加载求解 17
3.2.3 后处理 17
3.2.4 ANSYS处理应用技巧 . 18
3.3有限元法的计算步骤 18
3.3.1 构建模型 18
3.3.2 施加载荷计算 19
3.3.3 求解 19
3.3.4 后处理 20
4 电场作用下 R124 对气泡的影响 . 21
下一篇：非均匀电场强化沸腾换热实验研究