Teardrop Ratios - above deck

Fairly specific to solar competition cars but looks very interesting.

Found this or rediscovered this today.

Bel Geddes
http://viz.dwrl.utexas.edu/content/bel-geddess-flying-car-great-chimera-streamlined-era

 

Lots of interesting diagrams here:

Large eddy simulation of flow structures and pollutant dispersion in the near-wake region of the studied ground vehicle for different driving conditions
Large eddy simulation of flow structures and pollutant dispersion in the near-wake region of the studied ground vehicle for different driving conditions



I've not had much luck in blowing them up however.

More interesting stuff.

Research at DLR Göttingen on bluff body aerodynamics, drag reduction by wake ventilation and active flow control
http://www.sciencedirect.com/science/article/pii/S0167610501001611



I've been using the GOOGLE image search term "ground effect flow pattern automobile".

 

Keep in mind that the LES diagrams you show are for the centerline only, and the flow pattern will change as the slice moves outboard. Also the flow patterns would change if the sides were tapered.

 

Of course, but I have to think continuous learning about both teardrop and buff bodies at the same time has an advantage over focusing on a single type.

 

Agree with looking about both teardrop and bodies with bases. By the way, the "teardrop" shapes you've been posting illustrations of would sometimes be considered as "bluff bodies" in aerodynamics.

My comment about only looking at center slices applies to both bodies with bases and "teardrop" shapes.

Taper the sides of the vehicle in you illustration and the trailing vortices would become much smaller or disappear. Extrude a 2D teardrop shape so that it has slab sides and it will have strong trailing vortices even though it tapers to a thin trailing edge.

 

A SUBMARINE tower bridge?

 

In response to ????

 

In response to the funny car
(which has little to do with boats. But enjoy your excursion

 

I am not much of a technician, but from my observations from experience, I know that my Land Houseboat(Thanks, dskira http://www.boatdesign.net/gallery/showgallery.php/cat/500/ppuser/25425 for the name) only reduced my mileage about 2 miles per gallon.
On my trip out West I averaged 21 miles per gallon towing it, even up into Colorado on the way to the South Rim while not towing it I get 23 miles per gallon with the same 2.7 liter Tacoma.

 

Can you imagine what sort of mileage your Tacoma would get if it looked like your trailer?

 

You can get an idea by looking at the Volkswagen's XL1 concept hybrid car.

262 mpg consumption, just 8.3 HP required for 100 km/h (62 mph) cruise: http://www.caranddriver.com/news/2014-volkswagen-xl1-photos-and-info-news

However, the aerodynamic perfection and the extremely light-weight construction do carry their dose of problems too: http://autos.yahoo.com/blogs/motora...g-262-mpg-orb-motoramic-drives-172831276.html

 

Another one to tease your immagination, Kach: http://www.youtube.com/watch?v=5-usBDlyufs

 

Another lovely concept that IMO wont be accepted until these low fragile
vehicles can have their own lanes and roads. Seeing a truck in the rear vision
mirror coming up behind you is too scary for most motorists.

 

I ride motorcycles. Even the flimsiest of cars would give more protection.

 

No argument there.
And if there were more motorbike only roads and/or lanes there might be more
people willing to use them, and to create all sorts of three-wheel hybrids like
the vehicle Daiquiri pointed to.