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Introduction

2. BYU Motorsports. Electric Vehicle Racing Team. Electric Blue ... Design of experiments includes the design of all information-gathering exercises ...

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Introduction

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Presentation Transcript

    USFRA Monthly Meeting 6 June 2007 Miles Jackson B. Taylor Newill Streamliner Aerodynamic Optimization Using Arbitrary Shape Deformation

    2. BYU Motorsports Electric Vehicle Racing Team Electric Blue Streamliner Optimal Solutions Aerodynamics

    Introduction

    3. Streamliner Background

    Bonnevile Salt Flats History of Fast Electric Cars E1 Class: Electric < 500kg Current record: 219kph Goal: Exceed record by 25% Current record held by M. Murphy 1Silent ThunderM. Murphy' 97132.353Current record held by M. Murphy 1Silent ThunderM. Murphy' 97132.353

    Baseline Aerodynamics Initial Performance Cp Drag Downforce Lift/Drag Ratio

    4. Mechanical InLine Rear wheelsMechanical InLine Rear wheels

    Final Configuration Final Performance Cp Drag Downforce Lift/Drag Ratio

    5. Front Wheel drive also adds to stability Suspension Tom Burkland a number of years ago attached LVDTs to suspension and found that under 200 mph there is no need for a suspension. The spring rate of the tyres would suffice to absorb any One Speed Belt Driven Two miles to accelerate, pushed to speed, infinite variabliity with electric motor Aluminum front and rear wheels, we have a tyre on the front Front Wheel drive also adds to stability Suspension Tom Burkland a number of years ago attached LVDTs to suspension and found that under 200 mph there is no need for a suspension. The spring rate of the tyres would suffice to absorb any One Speed Belt Driven Two miles to accelerate, pushed to speed, infinite variabliity with electric motor Aluminum front and rear wheels, we have a tyre on the front

    6. Sculptor

    7. DOE

    Design of experiments includes the design of all information-gathering exercises where variation is present, whether under the full control of the experimenter or not. Design Variables Nose Forward Nose Height Nose Width Nose Top Channel Nose Bottom Channel Behind Wheel Channel1 Behind Wheel Channel2 Nose Thickness Rear Spats

    8. Response Surfaces

    9. Flow Visualizations

    10. CFD Results

    11. Conclusion/Future

    Traditional Wind Tunnel Impact 90 Wind Tunnel Hours @ $750/Hour 120 Manufacturing Hours @ $65/Hour 30 Design Hours @ $25/Hour Total Cost = $76,050 / 240 Man Hours Incomplete Data Map CFD with Sculptor Impact 60 Computational Hours @ $0/Hour 80 Design Hours @ $150/Hour Total Cost = $12,000 / 80 Man Hours Complete Data Map

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