View Single Post
Old 08-12-2016, 10:28 AM   #140 (permalink)
kach22i
Master EcoModder
 
kach22i's Avatar
 
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 4,187
Thanks: 132
Thanked 2,809 Times in 1,973 Posts
Quote:
Originally Posted by gumby79 View Post
In a head on wind I think the vortices will be on the bottom of the "wing" as the top is "frontal surface "=high pressure and the bottom is tapering slowly away in 2 plains causing low pressure
Quote:
Originally Posted by freebeard View Post
kach22i -- I agree with gumby79. The chines (not chimes) are roughly longitudinal and raked.
Guys, the top of the car is like the top of a wing, except to simplify discussion for a moment forget the underbelly of the car and ground pressure wave. Focus instead on the longer path the air travels going over the top of the roof verses flowing along the sides in straight line and shorter path.

Like with a wing, the car's air rolls/travels laterally from middle to outside edge (look at the "Random Wind Tunnel Images" thread). It does this because of the longer path traveled over the top, the air must move faster than when at the sides, when this happens pressure is lowered as velocity goes up.

The greater pressure air at the side rises up because of the lighter air pressure above being formed by the car's shape.

On an aircraft a wing fence may be used to impede the air drifting across the wing surface. This was a solution I have not yet illustrated, mentioning it for context now.

aircraft secondary flight controls

Quote:
Wing fences are fin-like vertical surfaces attached to the upper surface of the wing, that are used to control the airflow. On swept wing airplanes, they are located about two-thirds of the way out towards the wing tip and prevent the drifting of air toward the tip of the wing at high angles of attack. On straight wing airplanes, they control the airflow in the flap area. In both cases, they give better slow speed handling and stall characteristics.
http://airforces.fr/category/aircraft/x-planes/x-29/


The Vought V-173 "solution" to wing-tip turbulance





TBS C _ _ _ I _ _ _ _ A ?! - Page 6

Quote:
The more swept the wing is the more the airflow changes from flowing straight front to rear to flowing more or less outward, at an angle...
I supposed the question is; is there a slope in the plan view of the Nude Car Project which would add to the air differential pressure problems already discussed?

Anyway, returning to the topic of this thread.

1969 International Harvester Scout
Viewing Auction #300691362125 - 1969 International Harvester Scout 4X4 Pickup Truck with Snow Plow | Keith Martin's Collector Car Price Tracker


I bet this design has never seen a wind tunnel.
__________________
George
Architect, Artist and Designer of Objects

2012 Infiniti G37X Coupe
1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft

You cannot sell aerodynamics in a can............

Last edited by kach22i; 08-12-2016 at 02:32 PM..
  Reply With Quote
The Following User Says Thank You to kach22i For This Useful Post:
freebeard (08-12-2016)