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DOWNWASH CORRESPONDING TO A DOUBLET IN ACCELERATION POTENTIAL
Let us consider the velocity field corresponding to the acceleration potential of a vertical doublet. Without loss of generality we shall put the doublet at the origin.
For an oscillating field with a time factor еш, the vertical component of velocity v is related to the vertical component of acceleration ay through the equation (§ 13.2, Eq. 12)
This is the velocity downwash field corresponding to a doublet at the origin. If the doublet is situated at (f, 0), we have to replace x in the above formulas by x — f.
