Rotating spiral edge flames in von Karman swirling flows

被引：23

作者：

Nayagam, V ^{[1
]}

Williams, FA

机构：

[1] NASA, Glenn Res Ctr, Natl Ctr Micrograv Res, Cleveland, OH 44135 USA

[2] Univ Calif San Diego, MAE Dept, La Jolla, CA 92093 USA

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.84.479

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Experimental observations of rotating spiral flame edges formed during near-limit combustion of a downward-facing, polymethylmethacrylate disk spinning in quiescent air are reported. These flames exhibit similarities to patterns commonly found in quiescent excitable media. The tail rotates rigidly while the tip executes a compound, meandering motion sometimes observed in Belousov-Zhabotinskii reactions. A model assuming a rigid-body rotation with a constant speed of propagation relative to the swirling gas flow generated by the spinning disk predicts the observed spiral shapes well.

引用

页码：479 / 482

页数：4

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