Aerodynamics Book About Geometry of the Car Body

[eska]

I wonder if there any aerodynamics book about geometrically aerodynamics, how the shape of the flow passes a car body with certain shape.

Because most of aerodynamics book is about physics, not geometrically how the shape of the car body is.

[Greg Locock]

Hucho has a section on how gross changes in shape affect Cd. Unfortunately aero is really a matter of details, cars that look practically identical could be 10% different in drag.

[flynfrog]

there have been a few book threads over the years. I recommend you start with Katz and Mcbeath

http://www.amazon.com/Competition-Car-A ... NH1X4FS4AK

http://www.amazon.com/Race-Car-Aerodyna ... 0837601428


http://www.f1technical.net/forum/viewtopic.php?t=1507

[flynfrog]

If you are into low drag stuff

The Leading Edge

http://www.amazon.com/The-Leading-Edge- ... 0837608600

Its more dedicated to solar cars but it still applies to low drag stuff.

[eska]

there have been a few book threads over the years. I recommend you start with Katz and Mcbeath

http://www.amazon.com/Competition-Car-A ... NH1X4FS4AK

http://www.amazon.com/Race-Car-Aerodyna ... 0837601428


http://www.f1technical.net/forum/viewtopic.php?t=1507

That book is about physics, not geometry.

[rjsa]

There is no paint by numbers in fluid dynamics. There is a lot of guessing and a lot of trial and error.

If you want a shape driven approach setup a CFD package and start throwing shapes at it.

[Greg Locock]

Well, except that hucho does document a paint by numbers approach. And of course real engineers were doing aero long before CFD was around.

[rjsa]

Well, except that hucho does document a paint by numbers approach. And of course real engineers were doing aero long before CFD was around.

Sure, no CFD, doing trial by error on wind tunnels and test tanks. I've done my share.

There's nothing more paint by numbers than systematic series used on wings, ship hulls and propellers. But those won't stray from the same basic shape and will never guide you through adding untested appendage. That won't enable anyone to look at pictures and design his own groundbreaking car, ship or aircraft.

[flynfrog]

http://www.amazon.com/Theory-Wing-Secti ... 0486605868

If you just want to see shapes.

[godlameroso]

There's a general rule of thumb when it comes to aero shapes, in the simplest stupidest term, lift is created wherever you cause an absence of air. It's also a real chicken and egg kind of thing, when you hold your hand out into the wind and make a sharp shape against the wind, is the air pushing your hand down, or is your hand being sucked down? And all the instrumented experience in the world will tell you, that it's being sucked in which ever direction air cannot go, not by air pushing your hand up or down.

So if you want to add lift to any shape, you craft it so it forms a place where air has a hard time getting to while the craft is in motion. But here lies the trick, can you make this shape without interrupting the air flow? Because a focused stream of air can induce far more vacuum than turbulent air.

You can also increase the strength of your focused air stream by adding heat, because heat rises and tends to create low pressure as it rises.