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STUDY OF FUNCTIONAL ENHANCEMENT OF THERMAL PLASMA JET

热等离子射流功能增强的研究

基本信息

批准号：
09650204
负责人：
KOIKE Kazuo
金额：
$ 2.18万
依托单位：
TOHOKU GAKUIN UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09650204/
关键词：
THERMAL PLASMA FUNCTIONAL FLUID IN THE MAGNETIC FIELD STRONG MAGNETIC FIELD SUPERCONDUCTING MAGNET OPTICAL TEMPERATURE MEASUREMENT JET 超伝導磁石プラズマ機能性流体超伝導コイル光学計測 MHD流れ

项目摘要

To enhance the functions of thermal plasma flow using strong magnetic field, an experimental study of Argon plasma jet was carried out to examine the influence of the strong magnetic field on the flow behavior. The axial magnetic field was applied to the jet in a vacuum chamber by means of a pair of superconducting coils. Measurements were conducted under a variety of conditions of the distance from the plasma torch to the temperature measurement position, the supply current to the torch and the magnetic field. It is clarified in the present study that the thermal plasma jet is significantly affected by the strong magnetic field. That is, it was indicated from the relative line intensity measurement that the excitation temperature between the coils increases with the strength of magnetic field. This result shows that the strong magnetic field makes the plasma jet compress radially and that, consequently, the jet extends to the downstream region.The behavior of the plasma jet in the vacuum chamber was also shot through the windows for observation by a digital video camera. It was indicated from the observation that the width of the jet reduces with the application of strong magnetic field and that, consequently, the high temperature region, located in the middle of the jet, is extended to downstream direction. Moreover, the high temperature region in the middle of the jet becomes much brighter with the magnetic field than that without magnetic field.In addition, the relative spectral response of the present optical system was measured by means of the device for calibration set at the measuring position in the chamber. The results show the same trend as those from a lamp of tungsten filament.

为了增强强磁场对热等离子体射流的作用，开展了强磁场对氩等离子体射流流动特性影响的实验研究。利用一对超导线圈对真空室中的射流施加轴向磁场。在从等离子体炬到温度测量位置的距离、炬的供应电流和磁场的各种条件下进行测量。在本研究中，阐明了热等离子体射流是显着的强磁场的影响。也就是说，从相对线强度测量表明，线圈之间的激励温度随着磁场的强度而增加。结果表明，强磁场使等离子体射流径向压缩，射流向下游延伸，并通过数字摄像机拍摄了等离子体射流在真空室中的行为。结果表明，强磁场使射流宽度减小，射流中部的高温区向下游方向延伸。此外，在有磁场的情况下，射流中心的高温区比无磁场的情况下要亮得多。此外，利用安装在测量位置的定标装置，测量了本光学系统的相对光谱响应。结果显示出与钨丝灯相同的趋势。