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Spoiler CFD - Updates

Spoiler CFD - Updates. Reviewed By Jaiganesh. Santosh M&S CoE, EIEC, Pune 21 st July 2011. Objective & CFD Model. Objective: To predict drag with spoiler at different velocities (20 - 50m/s). Taurus. Model set up Wind Tunnel Testing. CAD Model used in CFD.

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Spoiler CFD - Updates

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  1. Spoiler CFD - Updates Reviewed By Jaiganesh Santosh M&S CoE, EIEC, Pune 21st July 2011

  2. Objective & CFD Model • Objective: • To predict drag with spoiler at different velocities • (20 - 50m/s) Taurus Model set up Wind Tunnel Testing CAD Model used in CFD Taurus model is used to leverage developed CFD methodology on actual car

  3. CFD Domain Actual CFD Domain Boundary Conditions Extended CFD Domain Working fluid : Air @ std atmospheric conditions L Outlet Inlet 2L 5L Inlet is placed 2L distance from the leading edge & Outlet is placed at 5L distance from trailing edge of Car in order to capture wake effects properly

  4. Results • All simulations shows < 10% error • % Error for simulations with spoiler is relatively higher than without spoiler. CFD results are > 90% agreement with test data

  5. Velocity Vectors at 40m/s Without Spoiler With Spoiler As expected recirculation pattern changes with spoiler

  6. Summary • CFD shows > 90% agreement with test data for Drag Force Prediction • As expected recirculation changes with attachment of spoiler

  7. Next - Plan • Required : • Test procedure of drag calculation (with picture) and Information about the test calibration curve (How it is generated) • Test data with Repeatability & Reproducibility • Difference between measuring instrument used for Ahmed body and Car model • Information about measurement gauge (accuracy and calibration)

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