Large Eddy Simulation of a Simplifed Car Model Exposed to an Unsteady Harmonic Crosswind

Examensarbete för masterexamen

Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.12380/204770
Download file(s):
File Description SizeFormat 
204770.pdfFulltext4.18 MBAdobe PDFView/Open
Type: Examensarbete för masterexamen
Master Thesis
Title: Large Eddy Simulation of a Simplifed Car Model Exposed to an Unsteady Harmonic Crosswind
Authors: Bravo, Miguel
Abstract: Large Eddy Simulation (LES) is used to simulate a case where a simplified model of a car is oscillating on its vertical axis inside a wind tunnel. This is done in order to represent incoming oscillating wind. This air flow reaches the model with an angle varying between 10 and 30 degrees. The simulation is performed for three different oscillation frequencies: 1, 2 and 4 Hz. The mesh is dynamically deformed for each timestep of the simulation in order to obtain a better description on the flow than using a quasy-steady approach, such as the ability to detect hysteresis effects. Then the evolution of the overall side force coefficient and yawing moment coefficient for the model are plotted and compared to experimental data obtained in the University of Tolouse. The differences are analyzed and recommendations for future studies and simulations are made. The computational mesh used in the simulations was created with the software FAME Hexa and the simulations were run using AVL Fire.
Keywords: Strömningsmekanik;Hållbar utveckling;Transport;Fluid mechanics;Sustainable Development;Transport
Issue Date: 2014
Publisher: Chalmers tekniska högskola / Institutionen för tillämpad mekanik
Chalmers University of Technology / Department of Applied Mechanics
Series/Report no.: Diploma work - Department of Applied Mechanics, Chalmers University of Technology, Göteborg, Sweden : 2014:49
URI: https://hdl.handle.net/20.500.12380/204770
Collection:Examensarbeten för masterexamen // Master Theses



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.