| Summary: | 碩士 === 國立臺灣大學 === 造船工程學系 === 85 === The purpose of this paper is to study the hydrodynamic
performance of a two dimensional jet-flapped foil in unsteady
motion by using the panel method. The unsteady motions include:
(1)the impulsive motion from rest. (2)the periodical swing of
jet deflection angle. (3)the sinusoidal heaving motion.Through
the present study, the following conclusions can be obtained:
(1)For the jet-flapped foil, it takes about for the flow field
to reach steady state in the impulsive motion from rest. (2)The
periodical swing of jet deflection angle will generate the delay
effect in the flow field. This effect will decrease the
effective jet deflection angle. (3)In sinusoidal heaving motion,
the lift coefficient curve shows a phase lead tendency.
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