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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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.Impossible is just something we haven't done yet. -- Langley Outdoors Academy
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