Open Access

ARTICLE

Analysis of the Heat Transfer Efficiency of an Automobile Engine under Different Grille Opening and Closing Conditions

Jian Song^*

College of New Energy Vehicles, Jingzhou Institute of Technology, Jingzhou, 434020, China

* Corresponding Author: Jian Song. Email:

(This article belongs to this Special Issue: EFD and Heat Transfer III)

Fluid Dynamics & Materials Processing 2022, 18(2), 345-354. https://doi.org/10.32604/fdmp.2022.017382

Received 06 May 2021; Accepted 05 July 2021; Issue published 16 December 2021

Abstract

Computational Fluid Dynamics is used to assess the thermal (heat transfer) performances of an automobile engine considering different grille opening and closing degrees. For this purpose the entire vehicle is modelled and three fundamental aspects are examined, namely, the open area of the air intake grille, the position of the upper and lower grilles and their shape. The results show that the opening area and position of the grille have some influence also on the aerodynamic characteristics of the automobile. With an increase in the opening angle of the grille, the C_D (Drag Coefficient) value of the whole vehicle becomes higher. When the air intake grille of the car is fully open or closed, the C_D value is 0.35434 or 0.31777, respectively, that is, the flow resistance in the engine compartment accounts for 10.32% of the C_D value for the whole automobile.

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Keywords

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