Quote:
Originally Posted by aerohead
*If they want meaningful results,then both CFD and wind tunnel testing must be conducted at supercritical Reynolds number.
*Yes,a cooling system would be nice,but I'm not certain that the effect of the VGs would be remarkably impacted by its presence.
*There's scientific evidence which would dispute the need for rotating wheels to obtain meaningful results.
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For me,the takeaway from the article is that,the investigators don't understand boundary layer theory,and consequently,their testing methodology and results have zero scientific merit.
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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.