university of washington human powered submarine systems report michael thompson-team captain brian...
TRANSCRIPT
University of WashingtonHuman Powered Submarine
Systems Report
Michael Thompson-Team CaptainBrian Matters-Dive Captain
Contents• Introduction• Submarine class• Propeller design• Power transmission system• Life support• Safety systems• Hull evaluation• Design summary
Team Introduction• University of Washington Human Powered
Submarine Team– Michael Thompson, Captain– Brian Matters, Co-Captain & Diving Coordinator
• Design Teams– Propulsion– Submarine Systems– Hull Design
Submarine Class
Propeller Design• Goals and Assumptions– Single screw– Optimize thrust– Design for specific power requirement– Design parameters based on research over
intuition– Design for ease of manufactuing
Propeller Research• Importance– Previous propeller design was based solely on
intuition– Specific revolution rates and power ranges were
needed– A way to evaluation propeller designs
• Propeller Dynamometer• Pilot Ergometer
Propeller Dynamometer• Test scale model propellers• Provide physical data• Compare and evaluate computer models
Pilot Ergometer• Better understand the human ‘engine’• Determine power output and rpm ranges• Optimize pilot ergonomics
Propeller Selection• Airfoil shapes researched• Ergonomic data used to constrain design• Propeller design evaluated using CFD and
tested on Propeller Dynamometer
Power Transmission• Design challenges– Previous system had extensive backlash and prone
to gear slip– Bearings degraded when exposed to water
• Goals– Reduce bearing friction– Properly design gear interface– Allow for transmission to be easily removable
Gearbox Design• Sealed gearbox to eliminate fluid drag• Enclosed shaft and supports• One piece design
Life Support• SCUBA component evaluation– Air consumption rates– Airway & breathing restriction
• Tanks size requirements– Staging and run times– Breathing rates
• Regulator selection– Pilot comfort
Primary Life Support System• Tank– AL-40– Enough air for five runs
• Regulator– Ocean Reef G-diver– Full use of airway
Emergency Air Supply• Design factors– Independent system– Removable in event of emergency accent
• Tank– Al 13 pony
• Regulator– Aqua Lung Titan LX
Safety Systems• Submarine paint scheme• Emergency egress• Diver restraints• Pilot visibility• Emergency beacon• Emergency buoy
Paint Scheme
Egress and Restraints• Egress was made to be as simple as possible• Pneumatic cylinders activate hatch release• Hatch release deployed with activation of
dead-man’s switch• Pilot is no longer actively restrained in the
submarine
Emergency Beacon and Buoy• Beacon system– Beacon is attached to top of hull for
maximum visibility
• Buoy design– Buoy system is self contained to
ensure line doesn’t tangle– Buoy is spring loaded and deploys
with retractable pneumatic cylinder
Hull Design• Design focus– Design and manufacture new hull– Renovate existing hull
• Existing hulls– Dubsub: sleek but cramped– Sirius: extra real-estate but large cross-sectional
area– CFD analysis
Hull Selection• Team race goals– Optimize for speed– Research automated controls– Limited manpower
• Formally Dubsub– Internal frame structure– Modular design
Hull Layout
Summary• Team goals– Further research into Marine Engineering– Increase public interest in Undersea Research– Apply education through real world application– Encourage younger students to pursue science as
it relates to the marine industry– Reflect well upon the University of Washington
and strengthen the team structure for the future
Questions?