Amelioration is the exhaust with relaxation entonoir

[gildas]

the venturi effect at 100km / h will make a few millibar of depression! completely negligible

But the back of a car at 100km / h must suck well ...
If the exhaust outlet is in the middle of the bumper, as below:




Photo source:
http://autokult.pl/2011/08/17/renault-c ... ugiej-reki

[gildas]

There is another area of ​​depression: it is the back of the car (...) The Elise exploits this strong depression to improve the draft of the engine (The two exhaust outlets are placed in the heart of the depression)

https://www.econologie.info/share/partag ... 7WF9JF.pdf

[Flytox]

There is another area of ​​depression: it is the back of the car (...) The Elise exploits this strong depression to improve the draft of the engine (The two exhaust outlets are placed in the heart of the depression)

https://www.econologie.info/share/partag ... 7WF9JF.pdf

The venturi effect increases as a square of the speed, to feel its effect it is necessary to roll the box (competition) ..... it is antinomic to save fuel.

[gildas]

Woof! ... What character this cabot!

[Flytox]

Woof! ... What character this cabot!

https://www.econologie.info/share/partag ... 7Jgy2k.mp3

[gildas]

The venturi effect increases as a square of the speed, to feel its effect it is necessary to roll the box (competition) ..... it is antinomic to save fuel.

Hey, Flytox ... We can also say that the venturi effect decreases if there is less speed, it falls well the engine speed too ... (for example 100km / h)

[chatelot16]

p = rho V2 / 2

air density rho = 1,2kg / m3

speed = 100km / h / 3600 = 27,7m / s

p = 1,2 x 27,7 ^ 2 / 2
= 1,2 x 771/2
p = 462 Pascal

462 Pa / 10 ^ 5 = 0,0046 bar

so at 100 km / h this depression is negligible

you need a plane that goes to 1000km / h to get 0,46 bar and it starts to count more seriously

[gildas]

So at 250km / h not too bad depression ... thanks Calculation Chatelot.

[Gaston]

speed = 100km / h / 3600 = 27,7m / s

What matters is the speed of the air at the place considered that can locally be much higher than the speed of the vehicle.

That said, we usually try to minimize the depression at the back of the car ... because it brakes the car