Aerodynamics Without using CFD
Aerodynamics Without using CFD
(OP)
Hi There,
A quick question, In the past I have used CFD to look at styling on cars, however I don't have CFD any more.
Do you think it would be possible to get a basic idea of how effective aerodynamic aids are at differing speeds without the use of CFD ?
A quick question, In the past I have used CFD to look at styling on cars, however I don't have CFD any more.
Do you think it would be possible to get a basic idea of how effective aerodynamic aids are at differing speeds without the use of CFD ?





RE: Aerodynamics Without using CFD
"... Lift". These books are intended for airplanes ... maybe there are more specific books for cars
good luck
RE: Aerodynamics Without using CFD
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: Aerodynamics Without using CFD
Cheers,
SkyD
RE: Aerodynamics Without using CFD
Find some deserted stretch of road and have a friend drive beside you and video the car.
( Next thing you know you will see the video all over the internet and you will be forced to move to some small island ....... no - not really :)!
Actually, I am sure you are well aware of 'tuft testing'.
Where the strips of yarn stick to the car and barely flutter, there is little turbulence.
Where the strips of yarn begin to twirl and flutter, the airflow has turbulence.
You can also add drops of oil to an area directly in front of where you want to test. As you get up to speed, the drops of oil will ether puddle, or trail outward.
Just be carefull not mess up the cars paint.
All of this is of little help if the car you are talking about only exists as a CAD file. ( You could always perform the tests on a large scale model.)
Good luck !