Embed Size (px)
Citation preview
Kevin Ciha
Florida Turbine Technologies, Inc.
561-427-6400
www.fttinc.com
Approved for Public Release
Internship Presentation Kevin Ciha
August 8th 2014
Approved for Public Release
About me
• Originally from Appleton,
Wisconsin. (I come from
the land of the ice and
snow, the frozen tundra,
etc.)
• UTSR Fellow
• Bachelor’s degree in
Aerospace Engineering and
Mechanics from University
of Minnesota, Twin Cities.
• Currently pursuing a
master’s degree in
mechanical engineering at
the U of M.
Approved for Public Release
COLD FLOW TESTING
Approved for Public Release
Background
• Interior cooling is used in trailing edge. Air flows
around pins. (Usually cylindrical)
• Use room temperature air, hence “cold flow”.
• Test different pin configurations and shapes and find
their pressure drops.
• Tested three shapes with eight non-dimensional
spacings each.
Approved for Public Release
Background continued
Approved for Public Release
Non-dimensional Spacing
Shape H/D X/D S/D
A1 1.25 1.625 3.75
A2 1.25 1.1 3.75
A3 1.25 2.25 3.75
A4 1.25 1.625 3
A5 1.25 1.625 4.5
A6 0.625 1.625 3.75
A7 3.125 1.625 3.75
A8 2.43 1.937 3.876
Approved for Public Release
Effects of S/D on
Klo
ss
Approved for Public Release
Effects of H/D on
Klo
ss
Approved for Public Release
Effects of X/D on
Klo
ss
Approved for Public Release
Conclusions
Approved for Public Release
LITERATURE SURVEY OF PIN
FIN ARRAYS
Approved for Public Release
Terminology
Approved for Public Release
Introduction
• Compared fifteen papers about various pin
arrays with our cold flow testing data.
• Pressure drop and/or heat transfer in pin fin
arrays was studied in each paper.
• Goal to find correlations between Reynolds
number and Nusselt number.
Approved for Public Release
Previous Studies
Approved for Public Release
Journal Papers Surveyed
Reference # Primary Author S/D X/D H/D Pr Reh
1 G. J. VanFossen 4 3.464 0.5 0.7 250 to 56000
2 D. E. Metzger 2.5 1.5 to 2.5 1 0.7 5000 to 136000
3 D. E. Metzger 2.5 1.0 to 5.0 1 0.7 3700 to 187000
4 S. C. Lau 2.5 2.5 1 0.7 11500 to 42000
5 Lesley M. Wright 2 2 2 0.7 9800 to 40000
6 Kathryn L. Kirsch 2.33 2.33 0.8 0.7 5000 to 20000
7 Jenn-Jiang Hwang 2.5 2.5 3.55 0.7 6000 to 42000
8 M. L. Busche 1.63 1.074 0.5 0.7 3000 to 46000
9 D. E. Metzger 2.5 2.5 1 0.7 5000 to 120000
10 Oguz Uzol 2 2 1.5 0.7 32000 to 147000
Approved for Public Release
vs. Nu Correlation
Nu
pin
Approved for Public Release
vs. Nu Correlation
Nu
h
Approved for Public Release
Conclusions
• Pin configuration has little impact on Nusselt
number!
• However, both cold flow and journal paper
data shows that there are significant
differences in pressure loss among pin
geometries.
• While overall heat transfer is mainly governed
by Reynolds number, pressure loss is
governed by the restricted area of the pin
geometry.
Approved for Public Release
HYDROCARBON LEAK DETECTION
SYSTEM (OR HOW TO NOT BLOW UP
YOUR ROCKET ON THE TEST STAND)
Approved for Public Release
Overview
• Helped develop a concept to detect fuel leakage from a
propellant valve.
• Researched various sensors and their potential pros and
cons for this project.
• Found off the shelf components to create each
configuration of the HLDS.
• Did lab tests with various configurations of the HLDS.
• Some CAD modeling.
Approved for Public Release
One HLDS Setup
Laptop computer
with Arduino
software program
to interpret Color
Sensor signal
Arduino board
Color Sensor
held in tube
opening Light source held
in tube opening
Syringe to
supply the
RP-2
Air supply
line with flow
meter
Air & RP-2
vent line
Hydrocarbon Detection Coating is
painted directly on the inside of this
Tee tube fitting, at the intersection
Approved for Public Release
A Current HLDS Concept
Inlet Flow
Probe Holder
LED Light Source Holder
Exit Flow
Approved for Public Release
Acknowledgements
Special thanks to:
Jim Downs
Elizabeth Garvin
Alex Pinera
Tim Miller
Bryan Bernier
Tom Sexton
Ken Head
It’s been fun!
Approved for Public Release
Questions?
