Experimental investigations on a common centrifugal pump operating under gas entrainment conditions

被引：37
|
作者：
Schaefer, Thomas [1 ]
Neumann, Martin [2 ]
Bieberle, Andre [1 ]
Hampel, Uwe [1 ,2 ]
机构：
[1] Helmholtz Zentrum Dresden Rossendorf, Inst Fluid Dynam, Dresden, Germany
[2] Tech Univ Dresden, AREVA Endowed Chair Imaging Tech Energy & Proc En, Dresden, Germany
来源：
NUCLEAR ENGINEERING AND DESIGN | 2017年 / 316卷
关键词：
Centrifugal pump; Gas entrainment; Two-phase flow; Gas holdup; Gamma-ray computed tomography; GAMMA-TOMOGRAPHY; FREE-SURFACE; DISTRIBUTIONS; PERFORMANCE; IMPELLER;
D O I：
10.1016/j.nucengdes.2017.02.035
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
This paper presents an experimental study on the effects of additional gas entrainment in centrifugal pumps designed for conveying liquid phases only. The pump performance has been evaluated for several gas entrainment conditions, and for various operational settings of the pump, such as its alignment and the rotational speed of the impeller. As a main performance indicator the impact of entrained gas on the hydraulic power of the pump has been analyzed using experimental data. Additionally, high-resolution gamma-ray computed tomography (HireCT) operated in time-averaged rotation-synchronized scanning mode has been applied to quantify local phase fraction distributions inside the rapidly rotating pump impeller. Based on these quantitative tomographic measurements, gas holdup profiles along selected streamlines have been calculated and gas accumulation areas inside the impeller chambers have been visualized. Thus, various internally accumulated gas holdup patterns have been identified and, eventually, associated with characteristic pump performance behaviors. Moreover, the tomographic measuring method allowed an enhanced gas holdup analysis in specified pump compartments. As a result, the related specific gas and liquid phase holdup profiles have been evaluated. (C) 2017 Elsevier B. V. All rights reserved.
引用
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页码：1 / 8
页数：8
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