heal.abstract |
The present diploma thesis studies the installation o
f the engine PT6T
-
6 to a test
bed inside the facility of
the Laboratory of Thermal Turbomachines
of National
Technical University of Athens. The
diploma thesis
is composed of two parts. The first
concerns the model
l
ing of the engine and the second focuse
s on the design of the
test bed
and the exploitation of the measurements.
In first the engine is presented and details are given concerning its
performance
.
Additionally the parameters
of
performance
of all components are chosen for the
desi
gn
point
according to
the manual
of the engine and the measurements of the
LTT
.
Next to the above, the
performance
of the engine is examined at the
design point
based on a simple thermodynamic model. Then the exact model of the engine is pro
duced
by the PROOSIS program and these results are compared to those of the simple
thermodynamic model. Next there is a deep research in order to find the proper location
of the
design point
to the maps of
components, calculate the
map scalars and
test th
e
off
-
design performance
of the
engine
. The results are compared to those of the
LTT
measurements, concerning engines with different serial number.
Afterwards the
performance
of the
engine
in a
test bed facility
is described and
the need of
correction of
the
performance magnitudes
to the
reference conditions
,
because of the change of the enviro
n
ment
al
condition. In addition
the performance of the
engine is examined
, concerning the corrected magnitudes,
and also
the capability
of the
engine
ru
nning in part
loads
is explained
, without its components
perform
o
n
fearful
map
areas. The above is needed in order to limit the produced power of the engine to what it
can be absorbed by the generator of the
test bed of LTT
.
As
far as
the second part of the thesis
concerns the base of
the
engine
is
designed, exactly the same as the one which is used to suppor
t the engine in the
helicopter. Also the tube system for the
expansion of the exhaust
gases
to the
en
vironment outside the test ar
ea
is design
ed, doing investigation for the exit
area in
order to achieve
higher
produced power.
Additionally is mentioned the
throttling
system
of the incoming flow, which the
LTT
already has, and a preliminary design
of the
adaptive parts for the i
nlet
of the engine and the
connection of
tubes
of the
throttling
system
to
the
inlet
of the engine
is taking place.
According to the above
,
the ranges of
magnitudes
of the desired meas
ured
parameters
for different throttling levels of the
incomin
g flow are examined.
In addition
the instruments of measurement
, which can be used,
are presented and their
performance
is briefly described, while the suitable instruments for operatio
n according to the above
ranges
are chosen. Moreover the
parameters,
w
hich can be measured on the engine
,
are
presented as well as their positions, on which the measurements occurred.
Finally, the processing of the data measurement is mentioned, meaning the
exploitatio
n of the measured performance
paramet
ers of the engine to calculate those,
which are impossible to measure, due to
non
-
existing measuring locations
or due to
ex
treme conditions, as it happens
in combustor exit
. |
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