Grimace
Well-Known Member
I'm looking for references that discuss, or provide equations, or even pretty pictures for standard aircraft airfoils in the Reynolds number range of about 1 million and up...
I've seen lots of stuff about wind turbines and R/C models in the under 400K range, however I'm looking for some information in the middle... specifically the 1 to 3 million range that isn't covered by the NACA data.
Someone had previously brought up the issue of low-Reynolds stall characteristics on "normal" airplane wings, but I can't find much on the topic. Approaching stall, my Re would be around 1.00E6 on a 24" chord... 1.3E6 on a 30" chord and so forth... And I'm really inclined toward smaller wings to get a greater aspect ratio for a given wing area, but I don't want to push things too far...
And as a little side question... in general, it's my observation that the effect of reynolds numbers on low-speed flight is less significant on a thinner airfoil... the thicker sections, for example, have greater changes (for the worse) in lift/drag/aoa as the Re drops down to 3E6. And flaps/slats/etc are also less effective at low Re numbers as well. Is there any data available for low Re flap systems? Does any book/reference/research cover this topic?
I've seen lots of stuff about wind turbines and R/C models in the under 400K range, however I'm looking for some information in the middle... specifically the 1 to 3 million range that isn't covered by the NACA data.
Someone had previously brought up the issue of low-Reynolds stall characteristics on "normal" airplane wings, but I can't find much on the topic. Approaching stall, my Re would be around 1.00E6 on a 24" chord... 1.3E6 on a 30" chord and so forth... And I'm really inclined toward smaller wings to get a greater aspect ratio for a given wing area, but I don't want to push things too far...
And as a little side question... in general, it's my observation that the effect of reynolds numbers on low-speed flight is less significant on a thinner airfoil... the thicker sections, for example, have greater changes (for the worse) in lift/drag/aoa as the Re drops down to 3E6. And flaps/slats/etc are also less effective at low Re numbers as well. Is there any data available for low Re flap systems? Does any book/reference/research cover this topic?
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