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If it were an internal duct like an air curtain I could see it, but right in front of the radiator there is a pressure gradient.
It looks like you're trying to reduce the stagnation point down to the variable size of the opening.
Which might work for a transonic needle nose.
Alternatively, you could modulate the flow with an exit flap, like the P-51 Mustang.
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.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
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.Because much of what is in the published literature is nonsense,
and much of what isn’t nonsense is not in the scientific literature.
-- Sabine Hossenfelder
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