Testing and modeling of air elimination in automotive cooling system

Examensarbete för masterexamen

Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.12380/255385
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Type: Examensarbete för masterexamen
Master Thesis
Title: Testing and modeling of air elimination in automotive cooling system
Authors: Forsgren, Johan
Winqvist, David
Abstract: The increasing environmental awareness in modern society pushes various fields to become more energy efficient, not least the automotive industry. The emerging electrification and the increased complexity of vehicles brings high demands on temperature regulation and the cooling system. Studies have shown that entrapped air in the cooling system does have negative effects on its performance and also causes deterioration of its components. In order to relieve the system from this unfavorable air, different kinds of separators are commonly used. This thesis investigated the use of cyclone separators in a vehicle cooling system. The aim of the project was to increase the knowledge regarding separators and provide Volvo Cars Corporation with a design suggestion. Simplified lab experiments on a transparent separator were used to validate a steady state, Eulerian-Eulerian CFD model in the computational software STAR-CCM+. The phases were evaluated using the Reynolds Stress Turbulence and turbulence response models. The computational model was utilized in combination with a parametric CAD-model to evaluate various design aspects which were found relevant based on a literature survey. A design of experiments was conducted and using the optimization toolbox of the commercial software mode- FRONTIER, a final design suggestion was presented. A 3D-printed model was used for verification of the final design in the lab test rig. The thesis has provided relevant information regarding different design parameters’ effect on separation efficiency, pressure drop and volume of the separator. The work has also shown the significance of the flow structures and bubble size entering the separator. Finally, the optimized design of the separator shows clear performance improvements in comparison to the reference model.
Keywords: Strömningsmekanik och akustik;Hållbar utveckling;Transport;Fluid Mechanics and Acoustics;Sustainable Development;Transport
Issue Date: 2018
Publisher: Chalmers tekniska högskola / Institutionen för mekanik och maritima vetenskaper
Chalmers University of Technology / Department of Mechanics and Maritime Sciences
Series/Report no.: Examensarbete - Institutionen för mekanik och maritima vetenskaper : 2018:64
URI: https://hdl.handle.net/20.500.12380/255385
Collection:Examensarbeten för masterexamen // Master Theses

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