Gas–Liquid Two-Phase Performance of Centrifugal Pump Under Bubble Inflow Based on Computational Fluid Dynamics–Population Balance Model Coupling Model

Author:

He Denghui1,Ge Zhenguo1,Bai Bofeng2,Guo Pengcheng1,Luo Xingqi1

Affiliation:

1. State Key Laboratory of Eco-Hydraulic in Northwest Arid Region of China, Xi'an University of Technology, Xi'an, Shaanxi 710048, China

2. State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710048, China

Abstract

Abstract In this study, a numerical simulation method based on Eulerian–Eulerian model and population balance model (PBM) (i.e., computational fluid dynamics (CFD)–PBM coupling model) was developed to investigate the gas–liquid two-phase performance of centrifugal pump under bubble inflow. The realizable k–ε model turbulence model was implemented in ansysfluent solver. The air and water were employed as the working fluids, which was consistent with the experiment. The water head and pressure increment obtained by the experiment were used to validate the numerical method. The results show that the CFD–PBM coupling model is superior to the Eulerian–Eulerian model, particularly in the “surging” conditions. Using the CFD–PBM coupling model, the influences of parameters, such as inlet gas volume fraction, liquid phase flowrate, and rotational speed, on the head and efficiency of the centrifugal pump were investigated. Under the design condition, when the inlet gas volume fraction increases from 3% to 5%, the bubbles form air mass and stagnate in the impeller channel. The stagnated air mass can hardly be discharged with the liquid phase. Thus, the pump head drops suddenly, i.e., the surging occurs. The two-phase performance of centrifugal pump can be improved under the surging condition by increasing the liquid flowrate and the rotational speed to a certain value. The results contribute to an alternative simulation method to investigate the characteristics of bubble flow in pump and shed new lights on the understanding of the performance of centrifugal pumps under two-phase flow conditions.

Funder

the National Key Scientific Instrument and Equipment Development Project, China

the National Natural Science Foundation of China

the Natural Science Basic Research Program of Shaanxi

Publisher

ASME International

Subject

Mechanical Engineering

Reference39 articles.

1. Rotating Corrected-Based Cavitation Model for a Centrifugal Pump;ASME J. Fluids Eng.,2018

2. Very Low Specific Speed Centrifugal Pump-Hydraulic Design and Physical Limitations;ASME J. Fluids Eng.,2018

3. Investigation of the Motion of Bubbles in a Centrifugal Pump Impeller;ASME J. Fluids Eng.,2019

4. Effect of Gas Quantity on Two-Phase Flow Characteristic of a Mixed-Flow Pump;Adv. Mech. Eng.,2016

5. An Analytical Model for Prediction of Two-Phase (Non-Condensable) Flow Pump Performance;ASME J. Fluid Eng.,1985

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3