纤维悬浮槽流空间模式稳定性分析

林建忠; 游振江

纤维悬浮槽流空间模式稳定性分析

浙江大学, 力学系, 流体传动及控制国家重点实验室, 杭州 310027

基金项目: 国家杰出青年科学基金资助项目(19925210)

详细信息

作者简介:
林建忠(1958),男,福建建阳人,教授,博士,博导(E-mail:mecjzlin@public.zju.edu.cn).

中图分类号: O373
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- 被引次数: 0
出版历程
- 收稿日期: 2002-08-25
- 修回日期: 2003-04-29
- 刊出日期: 2003-08-15

Stability Analysis in Spatial Mode for Channel Flow of Fiber Suspensions

Department of Mechanics, State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, P. R. China

摘要

摘要: 采用扰动的空间发展模式而非通常的时间发展模式,对含有悬浮纤维的槽流进行了线性稳定性分析。建立了适用于纤维悬浮流的稳定性方程并针对较大范围的流动Re数及扰动波角频率进行了数值求解。计算结果表明,纤维轴向抗拉伸力与流体惯性力之比H可以反映纤维对流动稳定性的影响。H增大使临界Re数升高,对应的扰动波数减小,扰动空间衰减率增加,扰动速度幅值的峰值降低,不稳定扰动区域缩小,长波扰动所受影响相对较大。纤维的存在抑制了流场的失稳。
- 流动稳定性 /
- 空间模式 /
- 纤维悬浮流 /
- 槽流
Abstract: Different from previous temporal evolution assumption,the spatially growing mode was employed to analyze the linear stability for the channel flow of fiber suspensions.The stability equation applicable to fiber suspensions was established and solutions for a wide range of Reynolds number and angular frequency were given numerically.The results show that,the flow instability is governed by a parameter Hwhich represents a ratio between the axial stretching resistance of fiber and the inertial force of the fluid.Anincrease of Hleads to araise of the critical Reynolds number,adecrease of corresponding wave number,a slowdown of the decreasing of phase velocity,a growth of the spatial attenuation rate and a diminishment of the peak value of disturbance velocity.Although the unstable region is reduced on the whole,longwave disturbances are susceptible to fibers.
- flow stability /
- spatial mode /
- fiber suspensions /
- channel flow

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参考文献(14)

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