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Old 12-15-2022, 12:36 PM   #589 (permalink)
Phase
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Join Date: Mar 2022
Location: oregon
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Black Bullet - '19 Hyundai Ioniq Hybrid Blue
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Quote:
Originally Posted by aerohead View Post
Closely-spaced streamlines mean high-velocity, low pressure.
Widely-spaced streamlines mean low-velocity, high pressure.
The base pressure is determined by the pressure at the separation line.
The only way to 'raise' the pressure is by elongating the body along a streamlined path, which produces the pressure recovery as the streamlines decelerate, trading velocity for static pressure.
( if you've seen the 'blue' wind tunnel smoke-flow image of the VW XL1, you'll see how the streamlines are 'wide' at the very back of the car. This is why it's Cd 0.189 ).
Same for M-B IAA.
M-B EQXX.
It's also why the car doesn't have rear lift and doesn't have a rear spoiler, and is stable at 112-mph.
I definitely need to extend my rear and make a mini boat tail. No idea how I’ll deal with the tail lights though
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