Cavitation erosion modelling on a radial divergent test section using RANS

Kevorkijan, Luka (author), Lešnik, Luka (author), Biluš, Ignacijo (author)

Cavitation is the phenomenon of fluid evaporation in hydraulic systems, which occurs due to a pressure drop below the value of the vapor pressure. For numerical modelling of this generally undesirable phenomenon, which is often associated with material damage (erosion), there are various mathematical vapor transfer models that have been validated in the past. There are different approaches to predicting cavitation erosion, which have mostly been experimental in the past. Recently various numerical models have been developed with the development of numerical simulations. They describe the phenomenon of cavitation erosion based on different theoretical considerations, such as Pressure wave hypothesis, Microjet hypothesis, or a combination of both. In the present paper, an analysis of the Schnerr-Sauer transport cavitation model was used, upgraded with an erosive potential energy model based on pressure wave hypothesis for cavitation erosion prediction. The extended numerical model has been applied to the case of a radial divergent test section in three different mathematical formulations. The results of simulation were compared and validated to experimental work performed by other authors. The study shows that the distribution of surface accumulated energy agrees with the experimental results, although certain differences exist between formulations. The applied method appears to be appropriate for further use, and to be extended to materials response modelling in the future.

• Language: English
• Keywords: cavitation, erosion, erosive potential energy, numerical simulation
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2022
• Number of pages: Str. 71-81
• Numbering: Vol. 68, iss. 2
• PID: 20.500.12556/RUL-135436
• UDC: 519.6:621.22
• ISSN on article: 0039-2480
• DOI: 10.5545/sv-jme.2021.7364
• COBISS.SI-ID: 99355907
• Publication date in RUL: 15.03.2022

Record is a part of a journal

• Title: Strojniški vestnik
• Shortened title: Stroj. vestn.
• Publisher: Zveza strojnih inženirjev in tehnikov Slovenije [etc.], = Association of Mechanical Engineers and Technicians of Slovenia [etc.
• ISSN: 0039-2480
• COBISS.SI-ID: 762116

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 13.02.2022
• Applies to: Accepted for publication

Secondary language

• Language: Slovenian
• Title: Modeliranje kavitacijske erozije na radialno divergentnem testnem odseku z uporabo RANS
• Keywords: kavitacija, erozija, erozivna potencialna energija, numerične simulacije

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0196
• Name: Raziskave v energetskem, procesnem in okoljskem inženirstvu