Taylor-vortex instability and annulus-length effects
Taylor-vortex instability and annulus-length effects
复制标题
DOI：
10.1017/s0022112076000098
复制
发表时间：
1976-05
影响因子：
3.7
通讯作者：
J. A. Cole
中科院分区：
文献类型：
--
作者：
J. A. Cole
在间隙c和长度L的取值范围内，通过对半径比为R1/R2 = 0.894 - 0.954的同心圆柱的扭矩测量和目视观察，确定了泰勒涡开始出现的临界速度和后来发展成波状涡的临界速度：c/R1 = 0.0478 - 0.119，L/c = 1-107。观察到泰勒临界速度随环形长度的有效零变化。当环形长度减少时，发现波浪形涡流开始时的速度大大增加，并且理论预测仅对于L/c值超过40的情况才是现实的。检查的所有四种间隙比的结果相似。对c/R1 = 0·119的偏心圆柱体的初步测量表明了相应的影响。
Critical speeds for the onset of Taylor vortices and for the later development of wavy vortices have been determined from torque measurements and visual observations on concentric cylinders of radius ratios R1/R2 = 0·894–0·954 for a range of values of the clearance c and length L: c/R1 = 0·0478–0·119 and L/c = 1–107. Effectively zero variation of the Taylor critical speed with annulus length was observed. The speed at the onset of wavy vortices was found to increase considerably as the annulus length was reduced and theoretical predictions are realistic only for L/c values exceeding say 40. The results were similar for all four clearance ratios examined. Preliminary measurements on eccentrically positioned cylinders with c/R1 = 0·119 showed corresponding effects.