Abstract
The article presents numerical results of the flow which is exhausted from the combustion chamber of a four-stroke engine. The unsteady simulations shown correspond to one working cycle of an exhaust valve. The flow has been described by the set of Reynolds–averaged Navier–Stokes equations. The working medium has been assumed an ideal gas. The numerical solution has been acquired with an in-house numerical code, COOLFluiD, based on a finite volume method (FVM). The numerical code is being developed by the team of engineers with wide range of specialization. Our major contribution has been connected to the implementation of the advanced turbulence models for both steady and unsteady simulations on moving grids. The current work focuses on the turbulence modelling and on the simulation of the real valve movement. The flow structure and the mass flow rate are observed. Due to a lack of experimental data, the computations are performed in a stepwise manner, validating each implementation step on the testcases known, before being applied to the valve geometry. The results presented therefore correspond to a planar model. The article focuses on the implementation of turbulence models and their application to complex geometry problems, rather than exploring new numerical methods.
MSC2010: 76N15, 76F55, 76H05
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Acknowledgements
This work has been supported by the grant of the Czech Science Foundation No. P101/10/1329 and by the project 1M6840770002 Josef Božek Research Center of the Ministry of Education of the Czech Republic.
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Žaloudek, M., Deconinck, H., Fořt, J. (2011). Unsteady Numerical Simulation of the Turbulent Flow aroundan Exhaust Valve. In: Fořt, J., Fürst, J., Halama, J., Herbin, R., Hubert, F. (eds) Finite Volumes for Complex Applications VI Problems & Perspectives. Springer Proceedings in Mathematics, vol 4. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-20671-9_83
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DOI: https://doi.org/10.1007/978-3-642-20671-9_83
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