石油学报 ›› 2002, Vol. 23 ›› Issue (2): 87-91.DOI: 10.7623/syxb200202019

• • 上一篇    下一篇

宾汉流体在环空中流动时的速度分布规律

李兆敏, 王渊, 张琪   

  1. 石油大学石油工程系,山东东营,257061
  • 收稿日期:2000-09-04 修回日期:2001-01-19 出版日期:2002-03-25 发布日期:2010-05-21
  • 作者简介:李兆敏,男,1965年生,1995年获石油大学(北京)油气井工程专业博士学位,现为石油大学(华东)石油工程系教授,博士生导师.
  • 基金资助:
    山东省自然科学研究基金资助项目(Y98A11014).

The law of velocity distribution of Bingham fluid's flowing in the encircle pipe

LI Zhao-min   

  1. Petroleum University, Donging 257061, China
  • Received:2000-09-04 Revised:2001-01-19 Online:2002-03-25 Published:2010-05-21

摘要: 将宾汉流体的本构方程与运动方程相结合,利用因次分析方法,推导出宾汉流体在环空中作层流运动时的速度分布规律.根据速度分布规律,讨论屈服应力和压力梯度等参数对宾汉流体环空层流速度分布剖面的影响:屈服应力增加,宾汉流体环空层流流动的速度分布与牛顿流体环空层流时的速度分布之间的差异加大,且流核宽度随屈服应力增加而增加;压力梯度减小,宾汉流体环空层流流动的速度分布剖面愈扁平,即流核宽度增加.

关键词: 宾汉流体, 环空流动, 速度剖面, 屈服应力, 压力梯度

Abstract: In this article,combinating Bingham fluid's constitutive equation with momentum equation,the velocity distribution of Bingham fluid's flowing in the encircle pipe is obtained by means of dimension analysis,which is under the condition of laminar flowing.Moreover the effects of some parameters such as yield stress and pressure gradient on the velocity profile have been discussed:the difference of velocity distribution between Bingham fluid and Newtonian fluid increases with yield stress,the width of flow nucleus also increases with yield stress;as pressure gradient is smaller and the velocity profile becomes flatter,it means the width of flow nucleus increases.

Key words: Bingham fluid, flowing in encircle pipe, velocity profile, yield stress, pressure gradient

中图分类号: