1 / 11

Spoiler CFD - Updates

Spoiler CFD - Updates. Reviewed By Jaiganesh. Santosh M&S CoE, EIEC, Pune 7 th July 2011. Objective & CFD Model. Objective: Simplification of the car model with Spoiler To predict drag force at 20m/s. Taurus. Model set up Wind Tunnel Testing. CAD Model used in CFD.

faunus
Download Presentation

Spoiler CFD - Updates

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Spoiler CFD - Updates Reviewed By Jaiganesh Santosh M&S CoE, EIEC, Pune 7th July 2011

  2. Objective & CFD Model • Objective: • Simplification of the car model with Spoiler • To predict drag force at 20m/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: Mesh Sensitivity Study With Spoiler Without Spoiler Drag force is not sensitive to mesh Drag force is sensitive to mesh

  5. Results-Recirculation Plots Mesh: 7M Error: 4% Mesh: 3M Error: 8% Recirculation is being developed Mesh: 9M Error: 1.2% Mesh: 5M Error: 8% Recirculation is fully developed

  6. Results-Velocity Plots Mesh: 3M Error: 8% Mesh: 7M Error: 4% Mesh: 9M Error: 1.2% Mesh: 5M Error: 8%

  7. Summary • Less recirculation is observed with spoiler • Fine mesh is required without spoiler as recirculation is more • Symmetry comparison can be done with spoiler

  8. 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 cad model • Information about measurement gauge (accuracy and calibration)

  9. Velocity Comparison With & Without Spoiler for 9M Mesh size More recirculation is observed without spoiler

  10. Velocity Comparison with Spoiler 3M 7M 7M 3M No change in drag with mesh as recirculation is less

More Related