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Can energy spent by mechanically sucking or blowing air be compensated by lower drag?
If a mechanical device (consuming energy) is used to blow or suck air to reduce the vehicle aerodynamic drag
Can this energy consumed by the mechanical device be overcompensated by a lesser amount of energy required to move the car at the same speed?
Thus net energy savings
Is there a thermodynamic law or something preventing this from happening?
Of course it all depends on vehicle speed.
At lower speeds when aerodynamic drag isn't important these mechanical air blowing/sucking devices should be turned off.
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