Go Back   EcoModder Forum > EcoModding > Aerodynamics
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 12-16-2019, 12:56 PM   #841 (permalink)
Master EcoModder
 
NeilBlanchard's Avatar
 
Join Date: May 2008
Location: Maynard, MA Eaarth
Posts: 7,859

Mica Blue - '05 Scion xA RS 2.0
Team Toyota
90 day: 42.48 mpg (US)

Forest - '15 Nissan Leaf S
Team Nissan
90 day: 156.46 mpg (US)

Number 7 - '15 VW e-Golf SEL
TEAM VW AUDI Group
90 day: 155.81 mpg (US)
Thanks: 3,361
Thanked 2,864 Times in 1,802 Posts

__________________
Sincerely, Neil

http://neilblanchard.blogspot.com/
  Reply With Quote
The Following User Says Thank You to NeilBlanchard For This Useful Post:
aerohead (12-18-2019)
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 05-14-2020, 04:38 AM   #842 (permalink)
Master EcoModder
 
Join Date: Nov 2017
Location: Australia
Posts: 496
Thanks: 36
Thanked 531 Times in 293 Posts
Nice to see so much AutoSpeed stuff here (my baby for about 18 years).
__________________
Modifying the Aerodynamics of Your Road Car

"Your book is unique! It was high time that someone covered vehicle aerodynamics through the practical eyes of someone like you." - Dr Wolf-Heinrich Hucho, the founder of modern vehicle aerodynamics

Last edited by JulianEdgar; 05-14-2020 at 06:50 AM..
  Reply With Quote
Old 05-15-2020, 03:37 PM   #843 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 11,288
Thanks: 18,180
Thanked 5,997 Times in 3,651 Posts
Cybertruck edge vorticity

Quote:
Originally Posted by NeilBlanchard View Post
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.
__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
  Reply With Quote
Old 05-19-2020, 01:15 AM   #844 (permalink)
Master EcoModder
 
gumby79's Avatar
 
Join Date: Dec 2014
Location: Butte, Montana
Posts: 714

little jona - '91 Dodge D 250 first gen cummins LE
Team Streamliner
90 day: 23.4 mpg (US)

Little Jona airo modded - '91 Dodge RAM 3/4 TON D 250 2×4 AUTO
Pickups
Team Cummins
90 day: 18.5 mpg (US)

The Salted Hound Jenny. - '87 Dodge Ram 50/D-50 5sp 4X4
90 day: 20.24 mpg (US)

Jona Allison aero - '91 Dodge Ram D-250 Le
90 day: 21.86 mpg (US)
Thanks: 206
Thanked 416 Times in 269 Posts
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.
Attached Thumbnails
Click image for larger version

Name:	DSC_4310_1.gif
Views:	146
Size:	1.40 MB
ID:	28221  
__________________
1st gen cummins 91.5 dodge d250 ,HX35W/12/6 QSV
ehxsost manafulld wrap, Aero Tonto
best tank: distance 649gps mi 24.04 mpg 27.011usg
Best mpg : 31.32mpg 100mi 3.193 USG 5/2/20


Former
'83 GMC S-15 Jimmy 2door 2wd O/D auto 3.73R&P
'79 Chevy K20 4X4 350ci 400hp msd custom th400 /np205. 7.5-new 14mpg modded befor modding was a thing
87' Hyundai Excel
83 ranger w/87 2.9 L FI2wd auto 18mpg on the floor
04 Mitsubishi Gallant 2.4L auto 26mpg
06 Subaru Forrester XT(WRX PACKAGE) MT AWD Turbocharged 18 plying dirty best of 26mpg@70mph
95Chevy Blazer 4x4 auto 14-18mpg
04 Chevy Blazer 4x4 auto 16-22mpg


  Reply With Quote
The Following 3 Users Say Thank You to gumby79 For This Useful Post:
aerohead (05-20-2020), California98Civic (05-19-2020), Joggernot (05-19-2020)
Old 05-19-2020, 11:09 AM   #845 (permalink)
Somewhat crazed
 
Piotrsko's Avatar
 
Join Date: Sep 2013
Location: 1826 miles WSW of Normal
Posts: 1,146
Thanks: 83
Thanked 302 Times in 258 Posts
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).
  Reply With Quote
Old 05-29-2020, 07:20 AM   #846 (permalink)
Cyborg ECU
 
California98Civic's Avatar
 
Join Date: Mar 2011
Location: Coastal Southern California
Posts: 5,944

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 66.42 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
90 day: 3671.43 mpg (US)
Thanks: 2,228
Thanked 1,930 Times in 1,316 Posts
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.



Attached Thumbnails
Click image for larger version

Name:	Screenshot_20200528-123834_Firefox.jpg
Views:	102
Size:	36.1 KB
ID:	28317   Click image for larger version

Name:	Screenshot_20200528-123849_Firefox.jpg
Views:	94
Size:	32.5 KB
ID:	28318  
__________________
See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.




Last edited by California98Civic; 05-29-2020 at 07:28 AM..
  Reply With Quote
The Following User Says Thank You to California98Civic For This Useful Post:
aerohead (05-29-2020)
Old 05-29-2020, 12:31 PM   #847 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 11,288
Thanks: 18,180
Thanked 5,997 Times in 3,651 Posts
lower image

Quote:
Originally Posted by California98Civic View Post
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.
__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
  Reply With Quote
Old 05-29-2020, 02:55 PM   #848 (permalink)
Somewhat crazed
 
Piotrsko's Avatar
 
Join Date: Sep 2013
Location: 1826 miles WSW of Normal
Posts: 1,146
Thanks: 83
Thanked 302 Times in 258 Posts
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
  Reply With Quote
Old 06-03-2020, 10:52 AM   #849 (permalink)
Cyborg ECU
 
California98Civic's Avatar
 
Join Date: Mar 2011
Location: Coastal Southern California
Posts: 5,944

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 66.42 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
90 day: 3671.43 mpg (US)
Thanks: 2,228
Thanked 1,930 Times in 1,316 Posts
From the first 65 pages of this thread (best of)

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:







__________________
See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.



  Reply With Quote
The Following User Says Thank You to California98Civic For This Useful Post:
aerohead (06-03-2020)
Old 06-03-2020, 04:47 PM   #850 (permalink)
Master EcoModder
 
Join Date: Nov 2017
Location: Australia
Posts: 496
Thanks: 36
Thanked 531 Times in 293 Posts
Quote:
Originally Posted by California98Civic View Post

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.


Quote:
Originally Posted by California98Civic View Post




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

__________________
Modifying the Aerodynamics of Your Road Car

"Your book is unique! It was high time that someone covered vehicle aerodynamics through the practical eyes of someone like you." - Dr Wolf-Heinrich Hucho, the founder of modern vehicle aerodynamics
  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com