Self-excited Vibration of a Nonconducting String in a Stagnation How due to Corona Discharge

电晕放电导致静止状态下非导电弦的自激振动

• 批准号: 11650253
• 负责人: YOSHIZAWA Masatsugu
• 金额: $ 2.3万
• 依托单位: Keio University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11650253/
• 关键词: Wire and Plate Electrode; Wire Electrode; Self-Excited Oscillation; Corona Wind; Stability of Vortex; P.I.D.; Numerical Simulation; Nonconducting Wire; PIV; コロナ放電; よどみ流れ; 自励振動; 線対平板電極; 線電極の横振動; モデル実験

It is not yet clarified why lateral oscillation of a wire electrode is self-excited in the industrial systems of the wire and plate electrodes with Corona discharge. This paper examines experimentally and numerically the stability of the stagnation flow of the incompressible fluid between the wire and plate electrodes with Corona discharge.First, it was confirmed experimentally that the non-conducting wire, which is fixed between the wire and plate electrodes with Corona discharge, were self-excited. That is, the excited frequency of lateral vibration of the nonconducting string is equal to the fundamental natural frequency. Therefore it is predicted that the nonconducting string is self-excited by the Corona Wind.Second, the unsteady stagnation flow pattern of Corona wind between the wire and plate electrodes were observed with the Particle Image Verocimeter. Moreover the time histories of the fluid velocities at a fixed points is measured with the two-dimensional laser Doppler Velocimeter. As a result, it was confirmed that the symmetric vortexes are occurred in the stagnation fluid flow, and there is a periodic cross flow. Those experimental results are obtained by the numerical solutions of the Navier-Stokes equation governing the unsteady two-dimensional fluid flow

在电晕放电的线电极和板电极工业系统中，为什么线电极的横向振荡是自激的，目前还不清楚。本文用实验和数值方法研究了电晕放电条件下不可压缩流体在线与板电极间滞止流动的稳定性。首先，实验证实了固定在电晕放电的线与板电极之间的非导电导线是自激的；即非导电弦横向振动的激发频率等于基频固有频率。因此，可以预测非导电弦在电晕风的作用下是自激的。其次，利用粒子图像测速仪观测了电晕风在线与板电极间的非定常滞止流动。利用二维激光多普勒测速仪测量了流体在某定点的速度时程。结果证实了滞止流体流动中存在对称涡，存在周期性交叉流动。这些实验结果是由控制非定常二维流体流动的Navier-Stokes方程的数值解得到的

项目成果

Masatsugu Yoshizawa: "Vortex-Induced Vibration of a Spring-Supported Cylinder in a Narrow Channel"How-Induced Vibrations (Proceedings of FIV2000). 53-60 (2000)

Masatsugu Yoshizawa：“窄通道中弹簧支撑圆柱体的涡激振动”How-Induced Vibrations（FIV2000 论文集）。

Masatsugu Yoshizawa: "Vortex-Induced Vibration of a Spring-Supported Cylinder in a Narrow channel"Flew-Induced Vibration (Proceedings of FIV 2000). 53-60 (2000)

Masatsugu Yoshizawa：“狭窄通道中弹簧支撑圆柱体的涡流诱发振动”飞流诱发振动（FIV 2000 会议记录）。