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DESIGNING BLOODHOUND SSC— The 1000mph Car*

DESIGNING BLOODHOUND SSC— The 1000mph Car*. Dr Ben Evans College of Engineering Swansea University. IMA Mathematics 2011, 24 th March 2011. *supported by EPSRC Platform Grant EP/D074258; EPSRC Research Grant EP/F032617. OUTLINE. BLOODHOUND SSC Project World Land Speed Record

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DESIGNING BLOODHOUND SSC— The 1000mph Car*

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  1. DESIGNING BLOODHOUND SSC— The 1000mph Car* Dr Ben Evans College of Engineering Swansea University IMA Mathematics 2011, 24th March 2011 *supported by EPSRC Platform Grant EP/D074258; EPSRC Research Grant EP/F032617

  2. OUTLINE BLOODHOUND SSC Project World Land Speed Record Importance of aerodynamic design Process of computational fluid dynamics (CFD) Validation of the process and THRUST SSC CFD applied to the design of BLOODHOUND SSC Conclusions

  3. THE BLOODHOUND SSC PROJECT

  4. LAND SPEED RECORD 1898 Gaston Ch-Laubat France 39mph 1904 Louis Rigolly France 103mph 1927 Sir Henry Segrave UK 203mph 1935 Sir Malcolm Campbell UK 301mph 1964 Donald Campbell UK 403mph 1964 Craig Breedlove USA 526mph 1965 Craig Breedlove USA 600mph 1983 Richard Noble UK 633mph • Andy Green UK 763mph (Mach 1.016)

  5. SUBSONIC TRANSONIC SUPERSONIC BLOODHOUND SSC 1000 mph M=0.0 M=0.5 M=1.0 M=1.5 SUBSONIC TO SUPERSONIC THRUST2 633 mph BABS (at Pendine) 171 MPH BLUEBIRD (at Pendine) 174 MPH THRUST SSC 763 mph HYPERSONIC

  6. BLOODHOUND SSC: DESIGN CHALLENGES propulsion structural performance control of the dynamic stability confirmed braking system strategy aerodynamics

  7. ANALYSING AERODYNAMIC DESIGNS: WIND TUNNEL TESTING

  8. ANALYSING ENGINEERING DESIGNS: COMPUTER SIMULATION OlekZienkiewicz 1921––2009 Simulation using computers (a) mathematical model (b) approximation (c) computer solution (d) analysis of the results aerodynamic modelling→computational fluid dynamics (CFD)

  9. MATHEMATICAL MODEL: AIR FLOW Basic laws of physics: conservation of mass, momentum and energy

  10. APPROXIMATION: 1D non–uniform subdivision approximation gets better as the element size decreases or as the number of nodes increases the subdivision: mesh creating the subdivision: mesh generation sub–regions: elements nodes: uniform subdivision

  11. APPROXIMATION: 2D

  12. CFD PROCESS: 2D actual wing mathematical description of the aerofoil section define the region mesh generation approximate equations and solve analyse solution

  13. AUTOMATIC MESH GENERATION: 2D REGION

  14. CFD PROCESS: 3D actual aircraft mathematical description of the aircraft surface define the region analyse solution approximate equations and solve mesh generation

  15. COMPUTER PERFORMANCE/COST 1990s: CRAY C90 supercomputer several million pounds 103MFlops national supercomputer centres 2010: PC cluster £130K 430 cpus 9x106MFlops university departments

  16. CFD: FLITE3D

  17. THRUST SSC PROJECT Ron Ayres THRUST SSC 1997

  18. THRUST SSC: CFD VALIDATION Mach 0.71 1.08 0.96 1.05 CFD Experiment μ=0 1 million elements 24 hours CRAY C90

  19. CFD: VARIATION IN LIFT axis of vehicle ground surface ground surface axis of vehicle

  20. THRUST SSC World Land Speed Record 763 mph Black Rock Desert, Nevada October 15th 1997

  21. BLOODHOUND SSC: DESIGN EVOLUTION project launch October 2008 initial concept 2007 current design

  22. WHEEL DESIGN single keel triple keel single keel pressure coefficient on the surface triple keel

  23. ENGINE INTAKE DESIGN CFD for the twin intake CFD for the modified single intake design total pressure at the engine face

  24. FRONT WHEEL PLACEMENT Original design Modified design yaw angle = -2º yaw angle = 5º

  25. REAR SUPERSONIC LIFT dark blue: low pressure → red: high pressure

  26. PARAMETRIC OPTIMISATION • Study parameters • delta leading edge sweep angle • base area • rear wheel track • fairing spike length • fairing spike height • boat-tail angle • body-delta angle • ride height • delta angle of attack • delta strut camber • rear shape • diffuser • suspension ‘blister’ • delta leading edge ‘crank’ • delta – body blend • fairing radius • fairing cone diameter • delta AoA

  27. PARAMETRIC OPTIMISATION dark blue: low pressure → red: high pressure

  28. FULL VEHICLE 100 million elements 24 hours 128 AMD Opteron processors

  29. CONFIGURATIONS ANALYSED • Config evolution

  30. ACCELERATING CAR red: low pressure → purple: high pressure

  31. CFD: FINAL DESIGN

  32. CAR BUILD: AUTUMN 2010―CHRISTMAS 2011

  33. RECORD ATTEMPT Hakskeen Pan in the north eastern corner of South Africa clay surface 10 miles of track & 1 mile overrun very hard and very flat good access & ideal weather clearance of 9 square miles by 300 workers in 128 days

  34. RUN PROFILE

  35. ACKNOWLEDGEMENTS Dr Jason Jones, Professor Oubay Hassan, Dr Clare Wood, KM, Dr Ben Evans Inset (left) Dr Lakhdar Remaki Inset (right) Professor Nigel Weatherill

  36. Thank you for listening…

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