Theoretical modeling of fluid interactions produced by ship bow thrusters.
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Authors
Cooper, Thomas Charles
Subjects
Advisors
Nunn, R.H.
Date of Issue
1982-03
Date
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
An analytical model of a jet injected normally from a
flat plate into a uniform crossing flow was modified to
provide an improved method of predicting the interference
effects arising from the complex flow fields induced by ship
bow-thrusters. This model is an extension of previous work
based upon a description of the jet as a series of distributed
vortices. The analysis takes into account the position
of the effective source of the jet and the blockage due to
the presence of the jet in the crossflow. Improvement in
the predicted pressure distribution on the plate was obtained
by adopting a new formula for determining the effective
jet source which more closely approximates the experimental
results. Further improvement resulted from the incorporation
of a symmetric foil shape to simulate the presence of
the jet and its highly turbulent wake. The accuracy of the
model was evaluated for representative jet-to-crossf low
velocity ratios. Good agreement with experimental results
was achieved for large portions of the interaction field
with particular improvement in the near-field and downstream
regions.
Type
Thesis
Description
Series/Report No
Department
Mechanical Engineering
Organization
Naval Postgraduate School
Identifiers
NPS Report Number
Sponsors
Funder
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.