Investigation of High Frequency magnetohydrodynamic propulsion

高频磁流体动力推进研究

基本信息

批准号：
05650270
负责人：
HATANAKA Yoshihiro
金额：
$ 1.41万
依托单位：
TOKYO UNIVERSITY OF MERCANTILE MARINE
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1994
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05650270/
关键词：
Magnetohydrodynamic Propulsion High Frequency Inverter Soft Switching Static Induction Transistor Zero Current Switching ZCS Overlapping Commutation Electrolysis 海水通電

项目摘要

A high frequency magnetohydrodynamic propulsion (HF MHD) which overcomes the problems for electrolysis of sea water and electrolytic corrosion in the electrode was developed. In the first place, a magnetohydrodynamic propulsion unit (MHD Unit) which was composed from several ferrite cores and carbon electrode was produced. A zero current switching (ZCS) type HF inverter for the high frequency power supply was numerically analyzed from the view point of soft switching. The ZCS operation region in the mu (normalized frequency) and lambda (normalized load) plane was elucidated in connection with switching stress in the resonant operation of the switching devices. On the basis of the analysis, the HF MHD system was designed and effectively tested in the sea water tank. From the results, no problem of electrolysis of sea water and electrolytic corrosion occured with good propulsion condition. In the second place, a new type of MHD unit which had less leacage flux than the first MHD unit applied an silicon steel core was produced. Furthermore, an improved type full bridge ZCS HF inverter which had wide ZCS stable operation region was developed. Through the numerical anlysis, the HF power supply was applied for the new MHD system and tested. More high speed of sea water flow was obtained in comparison with the first MHD system. The new principle of HF MHD was supplemented with experimental results.

开发了一种高频磁流体动力推进器（HF MHD），克服了海水电解和电极电解腐蚀的问题。首先，制作了由多个铁氧体磁芯和碳电极组成的磁流体动力推进单元（MHD单元）。从软开关的角度对高频电源零电流开关（ZCS）型高频逆变器进行了数值分析。阐明了 mu（归一化频率）和 lambda（归一化负载）平面中的 ZCS 工作区域与开关器件谐振操作中的开关应力的关系。在此分析的基础上，设计了高频磁流体检测系统，并在海水箱中进行了有效测试。从结果来看，未出现海水电解和电解腐蚀问题，推进状况良好。其次，生产了一种新型 MHD 单元，其漏磁通比第一个采用硅钢芯的 MHD 单元要少。此外，还开发了一种具有较宽ZCS稳定工作区域的改进型全桥ZCS高频逆变器。通过数值分析，将高频电源应用于新型MHD系统并进行测试。与第一个MHD系统相比，获得了更高的海水流速。高频磁流体动力学的新原理得到了实验结果的补充。