| Summary: | 碩士 === 國立海洋大學 === 造船工程學系 === 84 === The purpose of this thesis is to measure the effective
wake by Laser Doppler Velocimeter (LDV) induced by a highly-
skewed propeller in rotation.For consideration of the
blockage effect in the NTOU middle cavitation tunnel,
mounting a model ship in it will result in a serious
blockage effect.Therefore,a dummy model ship was instend
employed in the experiment.The axial component of the nomial
wake was simulated,the ship data obtained in a towing tank
and we used titanium oxide(TiO2) as the seeding in this
experiment. The inflow velocities around different
propeller radii were measured at many points on the cross-
section 3.625 cm upstream the propeller centerline.The
effective wake distribution was obtained from the measured
data and compared with those computed by PUF 3A developed by
MIT. In addition,the periodicity of the flow is quite clear
from 0.4R to 0.8R.
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