Numerical Investigation of the Influence of Inlet Pressure on the Cavitating Conditions into Centrifugal Pumps

Numerical and experimental results were presented in this study, concerning a test impeller of a centrifugal pump. From the experimental point of view, the cavitation was visualized at different Inlet Pressure values. Image processing and statistical treatment of the photographs taken at a given impeller position allowed fir quantifying the attached and cloud cavitation extent. A numerical model of 3D cavitating flows, based on the CFD code Fluent 6.1, has been developed to predict the cavitation behavior in the model which is considering the entire pump, the impeller and also the casing of the pump, with all its complex geometry and flow parameters. Non-cavitating and cavitating conditions were investigated. Calculations were found to be in good agreement with experimental measurements and visualisations. Experimental and numerical results concerning the pump parameters were investigated. The overall conclusion is the obvious knowledge that the NPSH is indeed affecting the cavitation condition in the centrifugal pumps, having direct impact on the magnitude of static pressures in various locations inside the pump, but is not altering too much the velocities' distributions of fluid. The results obtained show the ability of the model to simulate the main features of 3D cavitating flows in rotating machinery. The rich palette of results shown below is thoroughly investigating the flow parameters of the model.

• Record URL:
  • http://www2.cmu-edu.eu/annals/on-line-journal/
• 
• Availability:
  • Find a library where document is available. Order URL: http://www.cmu-edu.eu/anale/anale_engleza/revistaonline.html
• Authors:
  • Calimanescu, Ioan
  • Grigorescu, Lucian
• Publication Date: 2010

Language

• English

Media Info

• Media Type: Web
• Features: Figures; References;
• Pagination: pp 59-66
• Serial:
  • Constanta Maritime University Annals
  • Volume: 14
  • Publisher: Constanta Maritime University
  • ISSN: 1582-3601
  • Serial URL: https://cmu-edu.eu/annals/

Subject/Index Terms

• TRT Terms: Cavitation (Mechanics); Centrifugal pumps; Finite element method; Fluid dynamics; Mathematical models; Numerical analysis; Rotors
• Uncontrolled Terms: Numerical models
• Subject Areas: Marine Transportation; Vehicles and Equipment; I90: Vehicles;

Filing Info

• Accession Number: 01345099
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 20 2011 7:26AM