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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 09-30-2019, 07:18 PM   #31 (permalink)
Master EcoModder
 
teoman's Avatar
 
Join Date: Jan 2017
Location: Istanbul
Posts: 1,029

A3 - '12 Audi A3
Thanks: 51
Thanked 140 Times in 118 Posts
Tuft testing?

  Reply With Quote
The Following User Says Thank You to teoman For This Useful Post:
freebeard (09-30-2019)
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 10-03-2019, 09:04 AM   #32 (permalink)
Master EcoModder
 
kach22i's Avatar
 
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 3,329
Thanks: 4
Thanked 2,130 Times in 1,498 Posts
Plasma is such a drag.


Ayaks
https://en.wikipedia.org/wiki/Ayaks

Quote:
Plasma sheath

As altitude increases, the electrical resistance of air decreases according to Paschen's law. The air at the nose of Ayaks is ionized. Besides e-beams and HF pulse discharges, a high voltage is produced by the Hall effect in the MHD generator that allows a planar glow discharge to be emitted from the sharp nose of the aircraft and the thin leading edges of its wings, by a St. Elmo's fire effect. Such a plasma cushion in front and around the aircraft offers several advantages:[35][36][2]

The ionized air becomes electrically conductive, which allows the MHD generator to work and decelerate the flow down to the air-breathing jet engines.

The MHD-controlled inlet ramp allows to vector the flow as a shock-on-lip without physical inlet cones.

Electric charges mixed with the fuel increase the combustion effectiveness.

The bow shock wave is detached further ahead of the aircraft, the energy deposition in this region acting as a virtual blunted nose, although the nose stays physically very sharp. This minimizes the heat flux on materials.[35]

The temperature gradient in the air is locally modified, hence the speed of sound value, which mitigates and softens the shock wave. This lowers thermal effects on materials further, as well as the wave drag.[37][38][35]

The plasma cocoon surrounding the whole aircraft gives plasma stealth. Combined with hypersonic speeds and maneuverability, such a platform would be very difficult to detect, track and target
.
Magnetohydrodynamics?
__________________
George
Architect, Artist and Designer of Objects

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

Chin Spoiler:
http://forums.pelicanparts.com/off-t...effective.html

Rear Spoiler Pick Up Truck
http://forums.pelicanparts.com/off-t...xperiment.html

Roof Wing
http://ecomodder.com/forum/showthrea...1-a-19525.html

Last edited by kach22i; 10-03-2019 at 11:12 AM..
  Reply With Quote
The Following User Says Thank You to kach22i For This Useful Post:
freebeard (10-03-2019)
Old 10-04-2019, 11:41 AM   #33 (permalink)
Master EcoModder
 
Piotrsko's Avatar
 
Join Date: Sep 2013
Location: 1826 miles WSW of Normal
Posts: 753
Thanks: 29
Thanked 177 Times in 150 Posts
Feng sui is indistinguishable from fluid dynamics.
__________________
2000 F250 7.3 CC 20+ MPG @ 10000 #
2013 Golf tdi 47.5 mpg neutered, 1500 mi beer run
1988 Ranger EV Volt batts>> 18,000 MPG and climbing. Rag overhaul.
  Reply With Quote
Old 10-08-2019, 12:54 AM   #34 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 13,896
Thanks: 3,411
Thanked 4,574 Times in 3,642 Posts
teoman Don't forget to post about any results. I've identified an opportunity myself. I'm holding a low reservation number for one of these:

I want to substitute a steel VW wheel for the two fronts so that I can used Moon disks. Then I want to bend a circular strip of dielectric material into a conic section and attach it to the outer rear edge of the front fender. With a thick copper wire bent into a serpentine on the outside leading edge and the other behind the trailing edge.

Best case it would blow a sheet of air against the main body, to re-attach the turbulence coming from the A-arm suspension.

It's an electric vehicle, so power supply is no problem.
__________________
.
KONOSUBA -God's blessing on this wonderful world!
2019-11-12
_________________
  Reply With Quote
Old 10-08-2019, 10:30 AM   #35 (permalink)
Master EcoModder
 
Piotrsko's Avatar
 
Join Date: Sep 2013
Location: 1826 miles WSW of Normal
Posts: 753
Thanks: 29
Thanked 177 Times in 150 Posts
Quote:
Originally Posted by freebeard View Post

It's an electric vehicle, so power supply is no problem.
The power supply will promise to be annoying and inefficient. I do have concerns about plasma and the general public being in close proximity.
__________________
2000 F250 7.3 CC 20+ MPG @ 10000 #
2013 Golf tdi 47.5 mpg neutered, 1500 mi beer run
1988 Ranger EV Volt batts>> 18,000 MPG and climbing. Rag overhaul.
  Reply With Quote
Old 10-08-2019, 12:33 PM   #36 (permalink)
EcoModding Newb
 
redpoint5's Avatar
 
Join Date: Aug 2010
Location: Oregon
Posts: 6,551

Acura TSX - '06 Acura TSX
90 day: 28.39 mpg (US)

Lafawnda - '01 Honda CBR600 F4i
90 day: 47.32 mpg (US)

Big Yeller - '98 Dodge Ram 2500 base
90 day: 21.82 mpg (US)

Prius Plug-in - '12 Toyota Prius Plug-in
90 day: 57.64 mpg (US)

Mazda CX-5 - '17 Mazda CX-5 Touring
90 day: 29.6 mpg (US)
Thanks: 2,159
Thanked 2,449 Times in 1,809 Posts
I looked at that website and understand the concept, but is it really plasma? Seemed to be ionized air, which doesn't fit the definition of plasma. I'd expect ionizing air to be less energy intensive as creating plasma.
__________________
Gas and Electric Vehicle Cost of Ownership Calculator







Give me absolute safety, or give me death!
  Reply With Quote
Old 10-08-2019, 12:56 PM   #37 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 13,896
Thanks: 3,411
Thanked 4,574 Times in 3,642 Posts
The gating factor would be whether the aero improvement would pay for itself and not reduce range.

It would be inefficient to switch it on below 25mph. Above 25mph there would be other concerns.

edit: No true plasma fallacy
Quote:
Originally Posted by Wikipedia
Plasma - physics
Plasma is one of the four fundamental states of matter, and was first described by chemist Irving Langmuir in the 1920s. It consists of a gas of ions, atoms which have some of their orbital electrons removed, and free electrons.
A gas of plasma is poor wording.

__________________
.
KONOSUBA -God's blessing on this wonderful world!
2019-11-12
_________________

Last edited by freebeard; 10-08-2019 at 01:16 PM..
  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com