THERMAL SCIENCE

International Scientific Journal

NUMERICAL AND EXPERIMENTAL INVESTIGATIONS OF DRAG FORCE ON SCALED CAR MODEL

ABSTRACT
The numerical simulation and wind tunnel experiment were involved to observe the aerodynamic characteristics of car model. The investigation of aerodynamic characteristics on car model were difficult by using wind tunnel. It provides more comprehensive experimental data as a reference to validate the numerical simulation. In the wind tunnel experiments, the pressures on various ports over the car model were measured by using pressure scanner (64 bit channels). The drag force was calculated based on experimental and computational results. The realizable k-e model was employed to compute the aerodynamic drag and surface pressure distribution over a car model simulated at various wind velocity. The tetrahedron mesh approach was used to discretize the computational domain for accuracy. The computational results showed a good agreement with the experimental data and the results revealed that the induced aerodynamic drag determines the best car shape. In order to reveal the internal connection between the aerodynamic drag and wake vortices, the turbulent kinetic, re-circulation length, position of vortex core, and velocity profile in the wake were investigated by numerical analysis.
KEYWORDS
PAPER SUBMITTED: 2015-09-06
PAPER REVISED: 2016-01-03
PAPER ACCEPTED: 2016-02-09
PUBLISHED ONLINE: 2016-11-13
DOI REFERENCE: https://doi.org/10.2298/TSCI16S4153P
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2016, VOLUME 20, ISSUE Supplement 4, PAGES [S1153 - S1158]
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© 2018 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence