Journals / FDMP / Vol.17, No.4

Research Article

BEST PAPER 2021

CFD Analysis and Optimization of an Engine with a Restrictor Valve in the Intake System

Huali Guo*, Zhilong Zhang*
Guilin University of Aerospace Technology, Guilin, 541004, China
* Corresponding Author: Huali Guo. Email: ; Zhilong Zhang. Email:
(This article belongs to this Special Issue: EFD and Heat Transfer III)

Abstract

In some competitions the rules clearly state that all participating cars must install a restrictor valve structure in the intake system of the engine. The intake air volume of the engine is considerably affected due to the existence of such a valve. Indeed, a small interface diameter through which gas flows can lead to considerable flow resistance and loss. In this study, a four-cylinder engine for FSC racing is analyzed using a combined method based on numerical simulation and experiments. The analysis reveals that the main factors affecting the intake air volume are the intake manifold and the volume of the resonance chamber. The influence of such factors is assessed using a single variable method and an optimal model and parameters are obtained accordingly. Comparison of different results show that the maximum torque for the optimized system is increased from the original 42.6 N·m to 46.9 N·m, thus demonstrating an increase of 10.6%. These findings provide a theoretical basis for the design of the intake system and the improvement of engine performance.

Keywords

Optimisation analysis; restrictor valve structure; intake system; CFD
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