Magnetohydrodynamic electrical power generation using convexly divergent channel I. Experimental demonstration
Magnetohydrodynamic electrical power generation using convexly divergent channel I. Experimental demonstration
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利用凸发散通道磁流体动力发电一、实验演示
DOI：
10.1088/0022-3727/44/18/185201
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
Yoshihiro Okuno
中科院分区：
文献类型：
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作者：
Tomoyuki Murakami;Yoshihiro Okuno
我们描述了基于激波风洞的实验，以评估配备了凸发散超音速通道的磁流体动力发电机。研究了流动MHD等离子体的二维结构和电子温度的时间行为。比较了MHD发电等离子体在凸发散通道和线性发散通道中的空间分布和能量转换效率。为了理解通道几何修正效应的基本尺度，提出了一个凸度参数。利用这个简单而基本的标度参数，定量地研究了等离子体-流体性质和能量转换效率与通道凸度的关系。当凸度参数为0.35(通道凸度略有增加)而不是凸度参数为零(无凸度或凹凸度)时，MHD等离子体的质量和发生器的性能都得到了改善。本文是二元论的第一部分。
We describe shock-tunnel-based experiments carried out to evaluate a magnetohydrodynamic electrical power generator equipped with a convexly divergent supersonic channel. Two-dimensional structure of the streaming MHD plasma and the temporal behaviour of electron temperature are examined. The spatial profile of MHD power-generating plasma and the energy-conversion efficiency in the convexly divergent channel are compared with those from a linearly divergent channel. For an understanding of the basic scaling of the channel geometry modification effect, a convexity parameter is proposed. With this simple and fundamental scaling parameter, the dependence of plasma–fluid properties and energy-conversion efficiency on the channel convexity is quantitatively examined. The quality of MHD plasma and the generator performance are improved at the convexity parameter of 0.35 (a slight enhancement of the channel convexity) rather than at the convexity parameter of zero (no convexity or concavity). This paper is the first part of a duology.