The objective of this research is to map the flowfield around the trai
ling edge of a hydrofoil subject to transverse gust loading, to provid
e guidance for the formulation of an appropriate Kutta condition for i
nviscid solution methods. The hydrofoil is equipped with a trailing ed
ge that incurs boundary-layer separation over the last few percent of
the chord. Mean and unsteady velocity profiles are presented for the R
eynolds number of 3.8 X 10(6) and reduced frequency of 3.6. The locati
on of the separation point in steady flow is identified, and the regio
n of the separation trajectory in unsteady flow is seen. The magnitude
and phase of the unsteady circulation and lift are found and compared
to those values predicted by linearized methods.