Drag and Lift Reduction on Passenger Car with Rear Spoiler

摘要

This work proposes an effective numerical model based on the Computational Fluid Dynamics (CFD) approach to obtain the flow structure around a passenger car with Spoiler. The experimental work of the test vehicle and grid system is constructed by ANSYS-14.0. FLUENT which is the CFD solverandemployed in the present work. In this study, numerical iterations are completed, then after aerodynamic data and detailed complicated flow structure are visualized. In the present work, model of generic passenger car has been developed in solid works-10 and generated the wind tunnel and applied the boundary conditions in ANSYS workbench 14.0 platform then after testing and simulation has been performed for the evaluation of drag coefficient for passenger car. In another case, the aerodynamics of the most suitable design of spoiler is introduced and analysedfor the evaluation of drag coefficient for passenger car. The addition of spoilerresults in a reduction of the drag-coefficient 2.02% and lift coefficient 14.06% in head-on wind. Rounding the edges partially reduces drag in head-on wind but does not bring about the significant improvements in the aerodynamic efficiency of the passenger car with spoiler, it can be obtained. Hence, the drag force can be reduced by using add on devices on vehicle and fuel economy, stability of a passenger car can be improved.