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 CD (Drag Coefficient) value of the whole vehicle becomes higher. When the air intake grille of the car is fully open or closed, the CD value is 0.35434 or 0.31777, respectively, that is, the flow resistance in the engine compartment accounts for 10.32% of the CD value for the whole automobile.
Highlights
2.1 Research Framework of Active Air Intake Grille Based on the professional commercial CFD analysis software Fluent, the method of numerical simulation technology [6] is adopted to study the influence of grille structure parameters on vehicle wind resistance and engine compartment heat dissipation [7]
The flow field simulation analysis is conducted through the establishment of different opening and closing angle models of the air intake grille, and the influence law of the grille opening on the vehicle CD value is evaluated
The CD value of the whole vehicle increases with the increase of the opening angle of the grille
Summary
The automobile has entered the ordinary people’s family as a common means of transportation [1], and its application has been popularized. Due to the continuous popularization of automobiles and the improvement of people’s living standards, nowadays, every household basically uses cars as one of the main travel tools; people’s requirements for cars are limited to travel, and focus more on the performance indexes of the vehicle. This makes the design of the car more and more personalized and detailed. Reasonable structure design and control make the gas flow more reasonable, reduce the wind resistance of the car under the premise of not letting the engine overheat under long-time driving, and further improve the power and economy of the vehicle. There are still multiple deficiencies in the research of heat transfer function of automotive engine, so the further theoretical and practical research of active grille air intake is still needed
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
