Team Archimede École Polytechnique de Montréal Québec, Canada ISR #11, june 26 – july 3, 2011 • The Project • The Organization • The Submarine – Safety Requirements – Hull – Fins – Drivetrain – Propeller – Steering System – Inboard Computer – Future projects • Conclusion and questions 2 • Desing a freefloating vehicule that fully encapsulates the racer • • • • Direct propulsion Provide safety and lifesupport systems Unpressurized vehicule One person submarine propeller driving 3 • ISR #9 – Fastest speed in our category : One person propeller with 6,473 knots – «Forces Avenir» winner : Quebec wide technological and innovation contest • ISR #10 – 7th place • ISR #11 – Hope to be amongst the best and accomplish fast runs 4 • 11 students – Mechnical, Electrical and Industrial engineering undergraduate – Canada, France and Tunisia – 1st to 4th year of study to ensure future development of future submarines • Each member specially assigned on systems based on experience and interests • Three members executive directorate for administrative aspects 5 • Pop-up buoy – Reel cable – Pneumatic dead man switch easily reachable • Bright orange stickers and lines • White flash strobe light • Secondary air supply 6 • • • • Profile redesign to a circlular section Fluid dynamics analysis with Ansys Fluent NACA axisymetrical Sandwich composite hull – Multi layers of fiberglass – S-Foam corecell for buoyancy • Fabrication process – – – – Wet lay-up Counter-mold (plug) Mold Two halves hull joined by additionnal corecell 7 8 • Theoritical aspect – Drag – Profile – Lift forces • NACA 0010 9 • Design with Catia V5 Fixed part Mobile part Fin shaft 10 • Fin thickness reduced • Injection technique with bidirectionnal carbon fiber • Fixed and mobile parts to reduce stress and induced drag 11 • CFD simulation (pathline flow) • Convergence analysis • FEA and optimization Analysis 12 • Results Velocity vectors of water flow around the fins 13 • Carbon fiber injection – Halves molded and joined with eposy resin composite 14 • Adjustable to fit differents pilots • Provide an easy way to adjust the gear ratio • Stronger and more reliable than previous propulsion systems 15 Provides 8” of adjustments 16 • Three stage transmission – Bicycle transmission – Two helicoidal gear sets (vibration purpose) • The bicycle transmission provides adjustment of the gear ratio 17 • Ergonomy study for space • Verify the ability to operate the propulsion system 18 • Forces analysis on the hull to verify the rigidity of the hull under stress 19 • Same propeller as Archimede IV • Maximize the propeller efficiency – Two blades and minimum BAR ratio to increase the optimal diameter – Faster flow around the tips of the blades – Higher Reynolds number – Best propeller efficiency 20 • Reverse engineering process for blades and shroud with the Creaform 3D laser scanning gun • Skew distribution specially designed for the wake and pressure distribution of the bassin in depth 21 • Fixed nozzle around the propeller – Assembled with pre-swirl stators to balance the rotating flow of to fluid through the propeller disk • MARINE profile for the shroud – Minimum clearance between blade tips and inner surface 22 • • • • Great manoeuvrability with small corrections One hand control for pitch and yaw axes Entirely mechanical system: easy to set or repair Tested to be effective at 2 knots and above 23 • AA Batteries Powered – Innovation: with Hall effect ON/OFF system – Transistor controlled power • 128 X 240 dots LCD Screen – Two-angles display (Pitch and Roll) – Crank RPM speed – Recordable Max speed 24 • Custom PCB – Designed with Eagle software – Assembler and C language programming • Waterproof Box 25 • Short term – Electrical communication system – Contra-rotating propeller – Injection molding process for the next hull • Long term – Participate and gain experience in non-propeller categories 26 • University pool – Balance – Communication • 75 % divers • Better run yesterday than overall performances 2 years ago 27 • Summary • Main innovations – Composites – Adjustable drivetrain – Fins 28 29