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General separation angle of a tail extension

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Old   May 6, 2020, 01:54
Post General separation angle of a tail extension
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Hey, I'm trying to reduce the drag of a bus by adding tail extensions.

I've got opinions and also read online that the flow is going separate after an angle of 15d. But according to my analysis, the flow doesn't separate at even 25d angle.

Is it confirmed that the flow is going to separate on the tail extension after 15d? or Is my analysis correct?
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boundary layer, cfd, drag, flow separation

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