Airflow around the wing - Dimensional Analysis

[Kalgoolie]

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Hey guys,

I am a bit stuck on this prolbem. When it says identify the characteristic physical scales is this referring only to the length scales (l, h, b)? or is U, gravity, density and viscosity included as well?

Now the only two dimenionless groups that I think are relevant is the reynolds number and the froude number. So I am thinking of using the buckingham Pi theorem to derive the reynolds and froude number for this problem, is that correct?


*I have ignored the Mach number cos it says that the density and viscosity remains constant.

 

[Navin A S]

Yes, it is correct to use the Buckingham Pi theorem to derive the Reynolds and Froude numbers. You should also consider the Mach number, as it can be used to calculate the speed of sound. Additionally, you should think about the gravity forces and how they might affect the length scales. Finally, you should consider the density and viscosity of the fluid and how they might impact the length scales.