VELOCITY-MEASUREMENTS IN TURBULENT-FLOW OF VISCOELASTIC SOLUTIONS

被引：21
|
作者：
ROLLIN, A [1 ]
SEYER, FA [1 ]
机构：
[1] UNIV ALBERTA,DEPT CHEM & PETR ENGN,EDMONTON,ALBERTA,CANADA
来源：
CANADIAN JOURNAL OF CHEMICAL ENGINEERING | 1972年 / 50卷 / 06期
关键词：
Drag reduction - Flow velocity - Newtonian liquids - Velocity - Reynolds number;
D O I：
10.1002/cjce.5450500606
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
An experimental study, based on streak photograph determination of instantaneous velocities, was directed at determining the turbulent flow velocity profiles of polymer solutions in circular pipes. The measurements resolve several discrepancies in interpretation of earlier velocity profile measurements in drag reducing systems. In particular, it is shown for dilute drag reducers that the semilogarithmic profile due to Prandtl with the same slope as for Newtonian fluids is quantitatively correct provided Bogueés empirical correction function is applied to the data. For a relatively concentrated solution, data serve to extent on earlier study which has shown the flow to be transitional at surprisingly high values of Reynolds number. Copyright © 1972 Canadian Society for Chemical Engineering
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页码：714 / 718
页数：5
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