Title: Large-eddy simulation for the prediction of aerodynamics in IC engines

Authors: L. Thobois, G. Rymer, T. Souleres, T. Poinsot, B. Van Den Heuvel

Addresses: CFD Team, CERFACS, 42 - Avenue Gaspard Coriolis, 31057 Toulouse Cedex 01, France. ' Research Department, PSA Peugeot Citroen, 8 - Route de Gisy, 78943 Velizy, France. ' Research Department, PSA Peugeot Citroen, 18 - Rue des Fauvelles, 92256 La Garenne-Colombes Cedex, France. ' EEC Group, IMF Toulouse, 1 - Allee du Professeur Camille Soula, 31400 Toulouse, France. ' Ford Research Centre Aachen, Suesterfeldstrasse 200, D-52072, Aachen, Germany

Abstract: In this paper, large-eddy simulation techniques are used to predict aerodynamics through diesel engine intake ports under steady-flow conditions. For the first test case, swirling flows are investigated through an axisymmetric sudden expansion. The LES swirl profile predicted is compared with experimental measurements. For the second test case, a sudden expansion with a valve is tested, where discharge coefficient is compared to experimental data. For the third test case, the same approach is applied to a real engine geometry which has two intake ports. Both the swirl profile and the discharge coefficient are calculated and compared to experiments.

Keywords: aerodynamics; diesel engines; discharge coefficient; intake ports; large-eddy simulation; pressure loss; steady state flow bench; swirling flows; valves; swirl profile; CFD; computational fluid dynamics.

DOI: 10.1504/IJVD.2005.008468

International Journal of Vehicle Design, 2005 Vol.39 No.4, pp.368 - 382

Published online: 21 Dec 2005 *

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