Drag Reduction in Turbulent Pipe Flows of Aqueous Xanthan Gum Solutions

张根广 1; 2; 张鸣远 1; 杨万英 1; 朱宪然 1

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Drag Reduction in Turbulent Pipe Flows of Aqueous Xanthan Gum Solutions

更新时间：2025-12-08

- Drag Reduction in Turbulent Pipe Flows of Aqueous Xanthan Gum Solutions
- Vol. 41, Issue 9, Pages: 1092-1095(2007)
- 作者机构：
  
  1. 西安交通大学能源与动力工程学院,西安,710049
  2. 西北农林科技大学水利与建筑工程学院, 712100, 杨凌
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK123
- Online First：10 September 2007，
  
  Published：2007
- 稿件说明：
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张根广 1, 2, 张鸣远 1, et al. Drag Reduction in Turbulent Pipe Flows of Aqueous Xanthan Gum Solutions[J]. 2007, 41(9): 1092-1095.
DOI：

张根广 1, 2, 张鸣远 1, et al. Drag Reduction in Turbulent Pipe Flows of Aqueous Xanthan Gum Solutions[J]. 2007, 41(9): 1092-1095. DOI：

摘要

采用较粗水平圆管对两种温度多种浓度黄原胶溶液进行了较系统的实验研究

并应用Metzner-Reed广义雷诺数定义

对管道中不同流动状态的广义雷诺数进行了计算

得到了Fanning系数和广义雷诺数关系图

发现黄原胶溶液从层流到紊流转捩点的广义雷诺数随着溶液浓度的升高而增大

给出了转捩点广义雷诺数与溶液浓度变化的关系表达式.此外还发现:在层流区

黄原胶溶液的Fanning 阻力系数与广义雷诺数之间具有良好的线性关系

与牛顿流体阻力系数图吻合

这与前人的理论分析及实验研究结果一致; 在紊流区

黄原胶溶液具有明显的减阻效应

减阻效应随着溶液浓度的升高而增大.

Abstract

An experimental investigation on friction pressure drop of aqueous Xanthan gum solutions in a horizontal pipe with an inside diameter of 25 mm was conducted. Measurements were performed and the generalized Reynolds numbers of laminar-turbulent transition were calculated according to the definition by Metzner-Reed at 15 ℃ and 20 ℃ for the solution concentrations of 0.04%

0.06%

0.1%

and 0.2%

respectively. It is found that the critical generalized Reynolds number of laminar-turbulent transition increases with the solution concentration

and a correlation between the critical Reynolds number and the solution concentration can be derived. In the laminar flow region the Fanning friction factor is linearly dependent on the generalized Reynolds number

and the friction factor chart resembles that of Newtonian fluid. In the turbulent flow region

however

distinct drag reduction can be observed

and it increases with the increase of solution concentration.

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Keywords

references

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