磁场作用下壁面导电率对导电流体流动稳定性的影响

发布时间：2018-05-04 08:30

  本文选题：稳定性 + 法向磁场　； 参考：《华北电力大学学报(自然科学版)》2017年01期

【摘要】：导电流体在外置静态磁场作用下流动时,其流动特性会发生改变,进而使流体流动的稳定性更难以预测。采用非正则模态稳定性分析方法和数值模拟技术,研究了法向磁场作用下壁面导电率不同时平行平板内导电流体的流动稳定性。通过建立并求解扰动变量的原始和伴随控制方程组,考察了平板导电和平板绝缘情形下初级扰动的增长特征及其空间分布形式。结果表明,平板导电(Ha≥7)和平板绝缘(Ha≥8)情形下最优扰动增长倍数Gmax和局部雷诺数R的关系分别为Gmax≈5.34×10-4R2和Gmax≈6.12×10-4R2,相应的最优展向波数βopt与哈特曼数Ha成正比;平板导电时的扰动增长特征及其空间分布与平板绝缘情形下基本类似;但在平板导电条件下,磁场对扰动的抑制效果更明显。
[Abstract]:When a conducting fluid flows under an external static magnetic field, its flow characteristics will change, which makes the stability of fluid flow more difficult to predict. The flow stability of conducting fluid in parallel plate with different wall conductivity under normal magnetic field is studied by using irregular modal stability analysis method and numerical simulation technique. By establishing and solving the original and adjoint governing equations of disturbance variables, the growth characteristics and spatial distribution of primary disturbances in the case of plate conduction and plate insulation are investigated. The results show that the relationship between the optimal disturbance growth factor (Gmax) and the local Reynolds number R is Gmax 鈮，

本文编号：1842329