Numerical simulation of wall roughness effects in cavitating flow
| Autor: | Lionel Le Penven, Fraj Echouchene, Marc Buffat, Hafedh Belmabrouk |
|---|---|
| Přispěvatelé: | Laboratoire de Mecanique des Fluides et d'Acoustique (LMFA), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2011 |
| Předmět: |
Materials science
Flow (psychology) 02 engineering and technology Surface finish 01 natural sciences [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph] 010305 fluids & plasmas law.invention Physics::Fluid Dynamics 0203 mechanical engineering law 0103 physical sciences [PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph] Physics::Chemical Physics ComputingMilieux_MISCELLANEOUS Fluid Flow and Transfer Processes Turbulence Mechanical Engineering Injector Mechanics Condensed Matter Physics Discharge coefficient 020303 mechanical engineering & transports Cavitation Volume fraction Turbulence kinetic energy |
| Zdroj: | International Journal of Heat and Fluid Flow International Journal of Heat and Fluid Flow, Elsevier, 2011, 32, pp.1068-1075. ⟨10.1016/j.ijheatfluidflow.2011.05.010⟩ |
| ISSN: | 0142-727X |
| DOI: | 10.1016/j.ijheatfluidflow.2011.05.010 |
| Popis: | Hydrodynamic cavitation has an important effect on the performance of Diesel injectors. It influences the nature of the fuel spray and the efficiency of the combustion process. In the present study, we investigate numerically the effect of wall roughness in the cavitating and turbulent flow developing inside a Diesel injector. The mixture model based on a single fluid is adopted and the commercial Fluent software is used to solve the transport equations. The discharge coefficient Cd is computed for different cavitation numbers and wall roughness heights. Profiles of density mixture, vapor volume fraction, mean velocity and turbulent kinetic energy are reported. The effects of wall roughness and injection pressure are analyzed. |
| Databáze: | OpenAIRE |
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