Improving Vehicle Efficiency with Aerodynamic Modifications by Phil - - PowerPoint PPT Presentation

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Improving Vehicle Efficiency with Aerodynamic Modifications by Phil - - PowerPoint PPT Presentation

Jul 07, 2023 186 likes •650 views

Improving Vehicle Efficiency with Aerodynamic Modifications by Phil Knox Improving aerodynamics is just one of many fuel-saving techniques discussed on the ecomodder.com forum Factors contributing to the force of aerodynamic drag: Size of

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Improving Vehicle Efficiency with Aerodynamic Modifications by Phil Knox

Improving aerodynamics is just one of many fuel-saving techniques discussed on the ecomodder.com forum

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Factors contributing to the force of aerodynamic drag:

  • Size of the object
  • Shape and orientation of object
  • How hard the wind is blowing
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Drag Force=(Wind Pressure)(Shape and orientation factor)(size factor)

1/2ρV2

CD

Area

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Sharp changes in contour are highly upsetting to fluid flow

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Flow Separation

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The flow field around an automobile is characterized by flow separations.

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1970-80’s

Since the ‘80’s car drag coefficients are closer to 0.3

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Automakers know how to make highly aerodynamic cars but they generally do not choose to market them.

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Late ‘80’s simulation set-up by CMR Executed as a batch job on a mainframe computer – got the results the next day

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Questions?

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