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The Proposal

Investigation into effect of wings and other aerodynamic devices in racing cars Investigation of a New F1 Rear Wing Proposal and Its Effect on the Wake J Holmes – 0408251. The Proposal. FIA (Federation Internationale De L’Automobile) survey response

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The Proposal

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  1. Investigation into effect of wings and other aerodynamic devices in racing carsInvestigation of a New F1 Rear Wing Proposal and Its Effect on the WakeJ Holmes – 0408251

  2. The Proposal • FIA (Federation Internationale De L’Automobile) survey response • Most import element of racing to be improved is overtaking • FIA split wing design proposed • The CDG (Centreline Downwash Generating) wing • Design is aimed to increase overtaking in Formula One J Holmes – 0408251 University of Warwick

  3. Main Project Aims • Produce two models for comparison • Evaluate and contrast the wing proposal through CFD • Optimise the accuracy of simulations • Optimum mesh study • Varied turbulent models (physics conditions) J Holmes – 0408251 University of Warwick

  4. Multi-Vehicle Interaction High down force open-wheel racing • Loss of down force is a major concern • Especially for the ‘trailing’ car • Leading car diverts flow upwards • Change in flow direction reduces flow angle to front wing of trailing car • 50% loss of CLF at < 1 car length away J Holmes – 0408251 University of Warwick

  5. The Models • Upstream obstruction to simulate flow conditions • Based on 1998 McLaren Mercedes MP4-13 • Baseline model for comparison All dimensions in mm • CDG design should produce less ‘dirty’ air J Holmes – 0408251 University of Warwick

  6. Meshing • The mathematical description of the geometry • Includes vertices, faces and cells • Tetrahedral mesh offers a great degree of flexibility • Yet a lengthy process with complex geometry • Meshing problems encountered… J Holmes – 0408251 University of Warwick

  7. Intersecting Geometry • Geometric constraint solved through combine feature J Holmes – 0408251 University of Warwick

  8. Point Geometry • Cell generation difficulties over certain point geometry J Holmes – 0408251 University of Warwick

  9. Diagnostic Tool • Identifying erroneous geometry J Holmes – 0408251 University of Warwick

  10. Surface Wrapper Mesh • To ‘smooth’ sharp geometry J Holmes – 0408251 University of Warwick

  11. K-Epsilon Results J Holmes – 0408251 University of Warwick

  12. Down Force Taken from K-Epsilon Model Simulation - Down force on entire model at 160 km/h Original Model = 1270.76 N With Proposed Wing = 1383.82 N - Approximate area of rear wings Original Wing = 0.48 m2 Proposed Wing = 0.54 m2 J Holmes – 0408251 University of Warwick

  13. Stage Two • More computational power • Engineering Unix Computer • Mesh study: optimum mesh size • Different turbulent models used • Spalart-Allmaras Detached Eddy Turbulence • Reynolds Stress Turbulence • K-Omega Turbulence • Increased domain J Holmes – 0408251 University of Warwick

  14. CDG Wing Simulation Video J Holmes – 0408251 University of Warwick

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