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Thread: Aerodynamics of the new Mirage (0.27-0.31 drag coefficient varies with options)

  1. #101
    Senior Member Mitz's Avatar
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    .. still waiting for the arrival of my VG's..

    Quote Originally Posted by cyclopathic View Post
    Agree hatchback is more similar to tractor trailer or wagon. Read this:
    http://s89686473.onlinehome.us/airtabs-test.html
    so effect would be more pronounced with them at the sides?

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    Quote Originally Posted by MetroMPG View Post
    Optimal VG placement depends on the depth of the boundary layer, height & angle of the VG's. You place them close to the point of separation, but far enough ahead of it that the top of the VG can mix the faster flowing air in the upper part of the layer with the slower bottom layer.
    ...
    Quote Originally Posted by cyclopathic View Post
    ...
    If we were to fix it with vortex generators they would need to be installed ~12" in front of 1st gap or perhaps even more as there is a slight bend in the roof line. Unfortunately my son is categorically against VGs for aesthetic reasons (mystery to me), so I have no car to test this theory on. Have the set of EVO style VGs though.
    would this be the ideal placement of the VG's?

    I need to finalize the mounting location before sticking them to the body.

    Thanks for the ideas..



  2. #102
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    Quote Originally Posted by Mitz View Post
    so effect would be more pronounced with them at the sides?

    would this be the ideal placement of the VG's?

    I need to finalize the mounting location before sticking them to the body.

    Thanks for the ideas..
    1) I am not sure about sides. If you look careful Mirage A-pillars are wider than the rest of the car. This is in combination with windshield rain grooves redirects flow over the roof.

    2) not sure where is the "ideal", but I would put them a few inches in front of hatch door/roof separation gap. Just like in the post #66:



        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage DE 1.2 manual: 46.4 mpg (US) ... 19.7 km/L ... 5.1 L/100 km ... 55.7 mpg (Imp)


  3. The Following User Says Thank You to cyclopathic For This Useful Post:

    Mitz (03-04-2016)

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