Assessment of Cavitation Models for Compressible Flows Inside a Nozzle
This study assessed two cavitation models for compressible cavitating flows within a single hole nozzle. The models evaluated were SS (Schnerr and Sauer) and ZGB (Zwart-Gerber-Belamri) using realizable k-epsilon turbulent model, which was found to be the most appropriate model to use for this flow....
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-08-01
|
| Series: | Fluids |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2311-5521/5/3/134 |
| _version_ | 1797558280675917824 |
|---|---|
| author | Aishvarya Kumar Ali Ghobadian Jamshid M. Nouri |
| author_facet | Aishvarya Kumar Ali Ghobadian Jamshid M. Nouri |
| author_sort | Aishvarya Kumar |
| collection | DOAJ |
| description | This study assessed two cavitation models for compressible cavitating flows within a single hole nozzle. The models evaluated were SS (Schnerr and Sauer) and ZGB (Zwart-Gerber-Belamri) using realizable k-epsilon turbulent model, which was found to be the most appropriate model to use for this flow. The liquid compressibility was modeled using the Tait equation, and the vapor compressibility was modeled using the ideal gas law. Compressible flow simulation results showed that the SS model failed to capture the flow physics with a weak agreement with experimental data, while the ZGB model predicted the flow much better. Modeling vapor compressibility improved the distribution of the cavitating vapor across the nozzle with an increase in vapor volume compared to that of the incompressible assumption, particularly in the core region which resulted in a much better quantitative and qualitative agreement with the experimental data. The results also showed the prediction of a normal shockwave downstream of the cavitation region where the local flow transforms from supersonic to subsonic because of an increase in the local pressure. |
| first_indexed | 2024-03-10T17:29:02Z |
| format | Article |
| id | doaj.art-0a9c8b3ff54645078fc85f13fbe7662c |
| institution | Directory Open Access Journal |
| issn | 2311-5521 |
| language | English |
| last_indexed | 2024-03-10T17:29:02Z |
| publishDate | 2020-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Fluids |
| spelling | doaj.art-0a9c8b3ff54645078fc85f13fbe7662c2023-11-20T10:04:02ZengMDPI AGFluids2311-55212020-08-015313410.3390/fluids5030134Assessment of Cavitation Models for Compressible Flows Inside a NozzleAishvarya Kumar0Ali Ghobadian1Jamshid M. Nouri2Department of Mechanical Engineering and Aeronautics, University of London, Northampton Square, London EC1V 0HB, UKDepartment of Mechanical Engineering and Aeronautics, University of London, Northampton Square, London EC1V 0HB, UKDepartment of Mechanical Engineering and Aeronautics, University of London, Northampton Square, London EC1V 0HB, UKThis study assessed two cavitation models for compressible cavitating flows within a single hole nozzle. The models evaluated were SS (Schnerr and Sauer) and ZGB (Zwart-Gerber-Belamri) using realizable k-epsilon turbulent model, which was found to be the most appropriate model to use for this flow. The liquid compressibility was modeled using the Tait equation, and the vapor compressibility was modeled using the ideal gas law. Compressible flow simulation results showed that the SS model failed to capture the flow physics with a weak agreement with experimental data, while the ZGB model predicted the flow much better. Modeling vapor compressibility improved the distribution of the cavitating vapor across the nozzle with an increase in vapor volume compared to that of the incompressible assumption, particularly in the core region which resulted in a much better quantitative and qualitative agreement with the experimental data. The results also showed the prediction of a normal shockwave downstream of the cavitation region where the local flow transforms from supersonic to subsonic because of an increase in the local pressure.https://www.mdpi.com/2311-5521/5/3/134cavitationsingle nozzlecompressible flowCFDcavitation modelpredictions |
| spellingShingle | Aishvarya Kumar Ali Ghobadian Jamshid M. Nouri Assessment of Cavitation Models for Compressible Flows Inside a Nozzle Fluids cavitation single nozzle compressible flow CFD cavitation model predictions |
| title | Assessment of Cavitation Models for Compressible Flows Inside a Nozzle |
| title_full | Assessment of Cavitation Models for Compressible Flows Inside a Nozzle |
| title_fullStr | Assessment of Cavitation Models for Compressible Flows Inside a Nozzle |
| title_full_unstemmed | Assessment of Cavitation Models for Compressible Flows Inside a Nozzle |
| title_short | Assessment of Cavitation Models for Compressible Flows Inside a Nozzle |
| title_sort | assessment of cavitation models for compressible flows inside a nozzle |
| topic | cavitation single nozzle compressible flow CFD cavitation model predictions |
| url | https://www.mdpi.com/2311-5521/5/3/134 |
| work_keys_str_mv | AT aishvaryakumar assessmentofcavitationmodelsforcompressibleflowsinsideanozzle AT alighobadian assessmentofcavitationmodelsforcompressibleflowsinsideanozzle AT jamshidmnouri assessmentofcavitationmodelsforcompressibleflowsinsideanozzle |