Talk:Diffuser (automotive)

Untitled
There are some POV statements. For example "Enzo for the poor" under the thumbnail for the Ferrai F430. This is inappropriate for a wiki. —Preceding unsigned comment added by 165.145.253.137 (talk • contribs)

Factual basis
This is a terrible article which confuses the name for a single class of aerodynamic device (a diffuser) with many other aerodynamic devices, such as splitters, intakes, ducts and wings. I doubt the author of the second section has any understanding of the subject matter whatsoever. Needs completely rewriting. 86.136.208.207 00:02, 5 November 2007 (UTC)


 * I agree, not to mention there are numerous grammatical errors throughout the article, it need to be reduced in size dramatically until a rewrite can occur.--71.120.66.246 (talk) 22:23, 19 April 2008 (UTC)


 * And it is horribly condescending... —Preceding unsigned comment added by 76.169.65.130 (talk) 07:01, 16 June 2008 (UTC)


 * I added a Refimprove template. The article seems to have been rewritten since the discussion above but it still needs additional reliable sources. --Cryonic07 talk ° contribs 20:51, 14 April 2009 (UTC)

even if it has been rewritten - there's still a lot of wrong stuff in it. (to put it in a context: I help taking orals from master-students. If we hear this as an answer the student fails the exam) 1. there is a huge difference between a turbulent flow and a detached flow. Usually the flow around a car is everywhere turbulent - but NOT detached.

2. the imoprtant thing to understand how a diffuser generates downforce is that the pressure underneath a car is governed by the pressure behind the car - and NOT what happened at the front. (If you state that the flow is accelerated at the front which results in a low pressure under the car than why having a diffuser if the pressure is anyway low? the diffuser would increase the pressure by slowing down the flow it would only reduce drag!)

The pressure underneath a car is usually higher than the ambient pressure and with the proper use of a diffusor this pressure can be reduced. (Due to the proximity of the underbody to the road the flow is blocked at the front which results in this over pressure)

3. the article does not distinguish between race cars and production cars...

Flowgeek (talk) 19:15, 5 July 2009 (UTC)

Disagree with point 2.

http://eprints.soton.ac.uk/22607/

Here, all bodies (including very shallow diffusers) have a positive Cl. Cl is defined in the nomenclature as downforce coefficient. Similarly, you can see that the pressure coefficients are all negative on the bottom of this generic bluff body.

130.159.40.13 (talk) 03:12, 18 April 2015 (UTC)