Application of CFD numerical simulation for intake port shape design of a Diesel engine

Horváth, András and Horváth, Zoltán (2003) Application of CFD numerical simulation for intake port shape design of a Diesel engine. JOURNAL OF COMPUTATIONAL AND APPLIED MECHANICS, 4 (2). pp. 129-146. ISSN 1586-2070

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Abstract

In this paper we investigate the air flow characteristics of the intake port of a Diesel engine by numerical simulation, which is based on a self developed code. Several possibilities of the mathematical model of the engineering problem and their numerical solutions are implemented, discussed and some of them developed further and compared with actual physical measurements. As a conclusion we find that a first order finite volume method, the Vijayasundaram flux vector split method with local time-stepping is suitable for computing the flow characteristics, namely the flow and swirl coefficients, accurately. By accuracy we mean that the computed and the measured quantities differ in 0–0.5% and 0.5–10%, respectively, validating our numerical model. Applying subsequently this code and a domain deformation we are able to increase in 1% the flow coefficient under the constraint of a constant swirl number, which is significant since only small modifications were allowed.

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