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Document Description
Title
Theoretical
and
experimental
study
of
cycloidal
propellers
Author
Li
,
Jin
,
1960-
Description
Thesis
(M.Eng.)--Memorial
University
of
Newfoundland
,
1991.
Engineering
and
Applied
Science
Date
1991
Pagination
xi, 276 leaves : ill.
Subject
Cycloidal
propellers
Degree
M.
Eng.
Degree Grantor
Memorial University of Newfoundland. Faculty of Engineering and Applied Science
Discipline
Engineering and Applied Science
Language
eng
Notes
Bibliography:
leaves
93-97
Abstract
Experiments
were
done
on a
model
trochoidal
propeller
with a
pitch
ratio
of
2.9247T
in a
cavitation
tunnel
in the
Institute
for
Marine
Dynamics
(NRC).
Problems
which
caused
unreliable
test
results
from a
previous
experimental
study
of the
model
propeller
were
examined.
A
mal-functioned
torque
transducer
was
replaced.
Problems
in the
measurement
of
hydrodynamic
torque
and in
calibration
tests
were
analysed
and
effective
ways
to
solve
those
problems
were
used
in the
present
experimental
study.
Reliable
test
results
for this
model
were
obtained
for
propeller
revolution
speeds
of
100
,
150
,
200
RPM.
--
Mendenhall
and
Spangler's
discrete
vortex
method
of
studying
cycloidal
propeller
performance
was
modified
so
that
(a)
an
angle
of
attack
method
was
used
to
calculate
effects
of
wake
and
other
blades;
(b)
the
modeling
of
dynamic
stall
effects
were
included;
(c)
three-dimensional
effects
of the
blades
were
included.
The
theoretical
results
were
compared
with the
experimental
data
from the
present
tests
and from
published
results
for
cycloidal
propellers
with
different
pitch
ratios
and
number
of
blade.
It
was
found
that the
three
dimensional
correction
method
improved
the
predicted
propeller
performance
at
pitch
ratios
greater
than
7r
, The
two
dimensional
model
using
the
angle
of
attack
method
gave
better
prediction
of
propeller
performance
than
other
models
at
pitch
ratios
smaller
than
tt.
The
effectiveness
of these
models
is
discussed.
Type
Text
Resource Type
Electronic
thesis
or
dissertation
Format
Image/jpeg;
Application/pdf
Source
Paper copy kept in the Centre for Newfoundland Studies, Memorial University Libraries
Local Identifier
76099308
Rights
The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission.
Collection
Electronic
Theses
and
Dissertations
Scanning Status
Completed
PDF File
(24.22
MB)
--
http://collections.mun.ca/PDFs/theses/Li_Jin.pdf
CONTENTdm file name
32796.cpd
