Quote:
Originally Posted by ConnClark
Ummm... the fact that the vortex generators show a reduction in drag prove that it was supercritical. Bumps corners and curves tend to create more turbulence than a flat plate. If the flow was entirely sub critical all VGs would add is drag.
Unless they faked data the test shows validity. I think you need some time working with a real CFD package or in a wind tunnel or at least objectivly look at the data befor you make claims it has zero validity.
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All numerical or wind tunnel scale model testing must be conducted at supercritical Reynolds number or else the output data is meaningless.
There is not a published test which exists in the last 100-years which demonstrates otherwise.
If one doesn't understand dynamic similarity,there's no point pursuing testing of any kind.
If one doesn't understand boundary layer theory they'll never win a technical argument.
I'm in my 42nd year of objective observation.It's my responsibility to throw a caution flag whenever I see rule violation on the field.