Skapa referens, olika format (klipp och klistra)
Harvard
Cederlund, J. och Vikström, J. (2010) The Aerodynamic Influence of Rim Design on a Sports Car and its Interaction with the wing and Diffuser Flow . Göteborg : Chalmers University of Technology (Diploma work - Department of Applied Mechanics, Chalmers University of Technology, Göteborg, Sweden, nr: ).
BibTeX
@mastersthesis{
Cederlund2010,
author={Cederlund, Johan and Vikström, Jakob},
title={The Aerodynamic Influence of Rim Design on a Sports Car and its Interaction with the wing and Diffuser Flow },
isbn={ISSN 1652-8557},
abstract={Global climate change and increasing fuel prices demand more efficient
vehicles. Today the automotive industry invests significantly into developing
more efficient engines and to reduce the required force to propel the
vehicles. For a passenger car the aerodynamic drag is a dominant part
of the total resistance at highway speeds. In the area of sportscars, aerodynamic
drag is even more dominant due to higher speeds and the fact
that aerodynamics is also used in order to increase downforce. This result
in contradictory demands as downforce often comes with a drag penalty.
There has to be a delicate balance between the two. Even though the fuel
price is not an issue when racing, there is a demand for efficient vehicles
in order to obtain as much performance as possible within the rules.
The wheels have been shown to have a large influence on the global
aerodynamic properties of a vehicle. It has also been shown that the local
flow field around the wheels and wheel housings is highly dependent of
the rim design.
In this project the influence on the global as well as the local aerodynamic
properties from the rim design was studied. In addition the
interaction between rim design and diffuser was investigated as well as
the interaction between the diffuser and the wing.
The simulations showed clearly that a substantial decrease in drag
can be achieved with proper rim design. Blocking the crossflow through
the rims result in increased static pressure in the front wheel house and
thereby an increase in lift, whereas blocking the crossflow in the rear result
in increased downforce due to an increased flow rate through the
diffuser. It was however shown that the resulting flow around the rear
wheel was highly dependent of the rim design in the front. Furthermore it
was shown that removing the lower wing increase the downforce generated
from the upper wing whilst the base wake aft of the vehicle was substantially
reduced and thus also the driving force for the diffuser leaving it
less efficient.},
publisher={Institutionen för tillämpad mekanik, Chalmers tekniska högskola},
place={Göteborg},
year={2010},
series={Diploma work - Department of Applied Mechanics, Chalmers University of Technology, Göteborg, Sweden, no: },
keywords={External Aerodynamics, Road Vehicle Aerodynamics, CFD, Wheel Modeling, Rim design, Drag Reduction, Downforce, Wing, Diffuser},
note={91},
}
RefWorks
RT Generic
SR Electronic
ID 133661
A1 Cederlund, Johan
A1 Vikström, Jakob
T1 The Aerodynamic Influence of Rim Design on a Sports Car and its Interaction with the wing and Diffuser Flow
YR 2010
SN ISSN 1652-8557
AB Global climate change and increasing fuel prices demand more efficient
vehicles. Today the automotive industry invests significantly into developing
more efficient engines and to reduce the required force to propel the
vehicles. For a passenger car the aerodynamic drag is a dominant part
of the total resistance at highway speeds. In the area of sportscars, aerodynamic
drag is even more dominant due to higher speeds and the fact
that aerodynamics is also used in order to increase downforce. This result
in contradictory demands as downforce often comes with a drag penalty.
There has to be a delicate balance between the two. Even though the fuel
price is not an issue when racing, there is a demand for efficient vehicles
in order to obtain as much performance as possible within the rules.
The wheels have been shown to have a large influence on the global
aerodynamic properties of a vehicle. It has also been shown that the local
flow field around the wheels and wheel housings is highly dependent of
the rim design.
In this project the influence on the global as well as the local aerodynamic
properties from the rim design was studied. In addition the
interaction between rim design and diffuser was investigated as well as
the interaction between the diffuser and the wing.
The simulations showed clearly that a substantial decrease in drag
can be achieved with proper rim design. Blocking the crossflow through
the rims result in increased static pressure in the front wheel house and
thereby an increase in lift, whereas blocking the crossflow in the rear result
in increased downforce due to an increased flow rate through the
diffuser. It was however shown that the resulting flow around the rear
wheel was highly dependent of the rim design in the front. Furthermore it
was shown that removing the lower wing increase the downforce generated
from the upper wing whilst the base wake aft of the vehicle was substantially
reduced and thus also the driving force for the diffuser leaving it
less efficient.
PB Institutionen för tillämpad mekanik, Chalmers tekniska högskola,PB Institutionen för tillämpad mekanik, Chalmers tekniska högskola,
T3 Diploma work - Department of Applied Mechanics, Chalmers University of Technology, Göteborg, Sweden, no:
LA eng
LK http://publications.lib.chalmers.se/records/fulltext/133661.pdf
OL 30
