Application of multiphase modelling for vortex occurrence in vertical pump intake - a review

7th International Conference on Cooling & Heating Technologies

材料科学;物理学

Samsudin, M.L.^1 ; Munisamy, K.M.^2 ; Thangaraju, S.K.^2

Malakoff Power Berhad, Kuala Lumpur, Malaysia^1

College of Engineering, Universiti Tenaga Nasional, Kajang, Malaysia^2

关键词: Computational time;    Cooling water systems;    Degree of accuracy;    Maintenance cost;    Multiphase simulations;    Operational problems;    Sub-surface vortices;    Vortex formation;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/88/1/012024/pdf
DOI  :  10.1088/1757-899X/88/1/012024

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Vortex formation within pump intake is one of common problems faced for power plant cooling water system. This phenomenon, categorised as surface and sub-surface vortices, can lead to several operational problems and increased maintenance costs. Physical model study was recommended from published guidelines but proved to be time and resource consuming. Hence, the use of Computational Fluid Dynamics (CFD) is an attractive alternative in managing the problem. At the early stage, flow analysis was conducted using single phase simulation and found to find good agreement with the observation from physical model study. With the development of computers, multiphase simulation found further enhancement in obtaining accurate results for representing air entrainment and sub-surface vortices which were earlier not well predicted from the single phase simulation. The purpose of this paper is to describe the application of multiphase modelling with CFD analysis for investigating vortex formation for a vertically inverted pump intake. In applying multiphase modelling, there ought to be a balance between the acceptable usage for computational time and resources and the degree of accuracy and realism in the results as expected from the analysis.