Numerical Analysis of a Fluid Flow in a Racing Motorcycle Intake System

L. Sclafani and L. Postrioti (Italy)


Flow discharge coefficient, numerical computationaldomain, unstructured mesh, intake system.


In this study, the experimental results for discharge coefficient in a 4-valves engine head are compared with numerical results obtained by using the commercial CFD program Star_Cd. Different lift valves and different pressure drops have been considered. Goal of comparison is validation of numerical results. The computational model consists of around 600.000 cells and completely reproduces the actual geometry (inlet ducts, throttle valve in full load position, inlet manifold, inlet valves, engine head and outlet ducts).

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