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IMECH-IR  > 水动力学与海洋工程重点实验室(2009-2011)  > 期刊论文
Title:
Study of drag reduction by gas injection for power-law fluid flow in horizontal stratified and slug flow regimes
Author: Xu JY(许晶禹); Wu YX(吴应湘); Li H; Guo J(郭军); Chang Y(常英)
Source: Chemical Engineering Journal
Issued Date: 2009
Volume: 147, Issue:2-3, Pages:235–244
Abstract: In this work, the drag reduction by gas injection for power-law fluid flow in stratified and slug flow regimes has been studied. Experimentswere conducted to measure the pressure gradient within air/CMC solutions in a horizontal Plexiglas pipe that had a diameter of 50mm and a length of 30 m. The drag reduction ratio in stratified flow regime was predicted using the two-fluid model. The results showed that the drag reduction should occur over the large range of the liquid holdup when the flow behaviour index remained at the low value. Furthermore, for turbulent gas-laminar liquid stratified flow, the drag reduction by gas injection for Newtonian fluid was more effective than that for shear-shinning fluid, when the dimensionless liquid height remained in the area of high value. The pressure gradient model for a gas/Newtonian liquid slug flow was extended to liquids possessing the Ostwald–de Waele power law model. The proposed model was validated against 340 experimental data point over a wide range of operating conditions, fluid characteristics and pipe diameters. The dimensionless pressure drop predicted was well inside the 20% deviation region for most of the experimental data. These results substantiated the general validity of the model presented for gas/non-Newtonian two-phase slug flows.
Keyword: Drag Reduction ; Power-Law Fluid ; Gas-Liquid Flow ; Horizontal Pipes ; Non-Newtonian Liquid ; Pressure-Drop ; Reducing Polymers ; Large-Diameter ; 2-Phase Flow ; Pipes ; Air ; Mixtures ; Tubes ; Model
Language: 英语
Indexed Type: SCI
Corresponding Author: 许晶禹
Correspondent Email: xujingyu@imech.ac.cn
DOI: 10.1016/j.cej.2008.07.006
DOC Type: Article
WOS Subject: Engineering, Environmental ; Engineering, Chemical
WOS Subject Extended: Engineering
WOS Keyword Plus: NON-NEWTONIAN LIQUID ; PRESSURE-DROP ; REDUCING POLYMERS ; LARGE-DIAMETER ; 2-PHASE FLOW ; PIPES ; AIR ; MIXTURES ; TUBES ; MODEL
WOS ID: WOS:000264521700019
ISSN: 1385-8947
Subject: 流体力学::多相流
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/26500
Appears in Collections:水动力学与海洋工程重点实验室(2009-2011)_期刊论文

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Recommended Citation:
Xu JY,Wu YX,Li H,et al. Study of drag reduction by gas injection for power-law fluid flow in horizontal stratified and slug flow regimes[J]. Chemical Engineering Journal,2009-01-01,147(2-3):235–244.
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