Purpose

This study aims to present a numerical analysis of the behavior of the electric field and flow field characteristics under electrohydrodynamics (EHD) force. The influence of the jet airflow under the EHD force is investigated when it impacts the inclined flat plate.

Design/methodology/approach

The high electrical voltage and angle of an inclined flat plate are tested in a range of 0–30 kV and 0–90^°, respectively. In this condition, the air is set in a porous medium and the inlet jet airflow is varied from 0–2 m/s.

Findings

The results of this study show that the electric field line patterns increase with increasing the electrical voltage and it affects the electric force increasing. The angle of inclined flat plate and the boundary of the computational model are influenced by the electric field line patterns and electrical voltage surface. The electric field pattern is the difference in the fluid flow pattern. The fluid flow is more expanded and more concentrated with increasing the angle of an inclined flat plate, the electrical voltage and the inlet jet airflow. The velocity field ratio is increased with increasing the electrical voltage but it is decreased with increasing the angle of the inclined flat plate and the inlet jet airflow.

Originality/value

The maximum Reynolds number, the maximum velocity field and the maximum cell Reynolds number are increased with increasing the electrical voltage, the inlet jet airflow and the angle of the inclined flat plate. In addition, the cell Reynolds number characteristics are more concentrated and more expanded with increasing the electrical voltage. The pattern of numerical results from the cell Reynolds number characteristics is similar to the pattern of the fluid flow characteristics. Finally, a similar trend of the maximum velocity field has appeared for experimental and numerical results so both techniques are in good agreement.

中文翻译：

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多孔介质中电流体动力作用下射流冲击斜平板的数值分析

目的

本研究旨在对电流体动力学 (EHD) 力下的电场行为和流场特性进行数值分析。研究了喷射气流在 EHD 力下撞击倾斜平板时的影响。

设计/方法/方法

分别在0-30 kV和0-90 ^°范围内测试倾斜平板的高电压和角度。在这种情况下，空气被置于多孔介质中，入口喷射气流的变化范围为 0–2 m/s。

发现

研究结果表明，电场线图案随着电压的增加而增加，并影响电力的增加。倾斜平板的角度和计算模型的边界受电场线图案和电压面的影响。电场模式是流体流动模式的差异。随着倾斜平板的角度、电压和入口射流气流的增加，流体流动更加扩大和更加集中。速度场比随着电压的增加而增加，但随着倾斜平板与入口射流夹角的增加而减小。

原创性/价值

最大雷诺数、最大速度场和最大单元雷诺数随着电压、入口射流气流和倾斜平板角度的增加而增加。此外，随着电压的增加，单元雷诺数特征更加集中和扩展。单元雷诺数特性的数值结果模式类似于流体流动特性的模式。最后，最大速度场的类似趋势出现在实验和数值结果中，因此两种技术都非常吻合。