Random Wind Tunnel and Smoke Pictures Thread

[NeilBlanchard]

[JulianEdgar]

Nice to see so much AutoSpeed stuff here (my baby for about 18 years).

[aerohead]

Originally Posted by NeilBlanchard

Tesla CYBRTRK:

It's conceivable that the edge vortices as drawn in in red won't exist.The early prismatic bodies from which this phenomena do exist,in no way represent Cybertruck's form.
Tesla provides the following features lacking in the prismatic models:
*nose chamfer (Prandtl surface of discontinuity will steer inviscid flow around a traveling stagnation bubble as if it were an ideal nose)
*chamfer-to-cowl-to to roof apex curvature (there's not a straight line anywhere)
*the pre-apex-to post- apex angle intersection is a fraction of that on the prismatics
*post-apex roofline is curved,not straight
*Tesla's greenhouse/beltline is inclined,continuously attacking the flow field
*Tesla's greenhouse has tumblehome
*the Tesla has plan body camber (it has 6-widths)
*The Tesla has boat-tailing,beginning between the doors,nothing seen like this since Impact/EV1
*Tesla has 8-inches of vertical suspension travel,fore and aft.We know from research conducted on the Ahmed body,that all attached longitudinal vorticity can be totally eliminated via roof,sides,and belly inclination tuning. Tumblehome alone can help mitigate vorticity in some circumstances.
*The wheel eruptions could actually be introduced to tune pressure spikes along the flanks as in Whitcomb-waisting/Coke-bottling/area-rule/sectional density
*As depicted,she could be as low as Cd 0.28
The entire forebody was tested in the late 1960s,with Nuccio Bertone's Carabo concept car.The tuft flow is perfect,with zero vorticity.

[gumby79]

50mph Rear air flow on a dirt road with 20mph constant true head wind out by the Bonneville Salt Flats.
This is w/stock bumper. See the down wash off the Aero Tonto.

[Piotrsko]

Nice. no visible dirt flow off the front tires only the back which is where I presume all the flows meet and get goofy ( technical term).

[California98Civic]

Two screenshots and the text from the YouTube video Hersbird posted yesterday in another thread:

Cd 0.146

The ENO.146 is a world record aerodynamic achievement which was developed as a global collaboration between the GAC Design Studios in Guangzhou, Shanghai and Los Angeles. This EV concept boasts a best in class aero exterior, and showcases the new GAC “Vector Energy” form language. While the innovative interior layout embraces a typical six passenger extended Chinese family scenario. The GAC Group is very proud to launch this concept to the world at the Guangzhou Auto Show on November 22, 2019.

[aerohead]

Originally Posted by California98Civic

Two screenshots and the text from the YouTube video Hersbird posted yesterday in another thread:

Cd 0.146

The ENO.146 is a world record aerodynamic achievement which was developed as a global collaboration between the GAC Design Studios in Guangzhou, Shanghai and Los Angeles. This EV concept boasts a best in class aero exterior, and showcases the new GAC “Vector Energy” form language. While the innovative interior layout embraces a typical six passenger extended Chinese family scenario. The GAC Group is very proud to launch this concept to the world at the Guangzhou Auto Show on November 22, 2019.

From the lower photograph, it would appear from the smoke filaments, that the tunnel air velocity was at sub-critical Reynolds number.

[Piotrsko]

I will hazard @critical flow but looks janky or photoshopped. Stuff going up & down that don't match the profile particularly at the front wheel. I think critical flow because at least on aircraft, you don't know what will actually happen, attached, separated, both, whatever, which is bad juju when you are near the edges of sky

[California98Civic]

I went through 65 pages looking for some of the best images. I was looking for something that I am not looking for anymore. Anyway, some nice images.

Probably the most complete set of those Porsche 911 images:
https://ecomodder.com/forum/showthre...tml#post393077

I think this was the best K-form image in the thread:


Lots of other good ones:

[JulianEdgar]

Originally Posted by California98Civic

I think this was the best K-form image in the thread:

That's the test where a Cd of 0.37 was recorded by VW. No separation edges and the large wake wouldn't have helped.

Originally Posted by California98Civic

Both models I think (ie not representative of reality).