# Boundary layer thickness on the sides of a civil aircraft

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 September 26, 2012, 06:48 Boundary layer thickness on the sides of a civil aircraft #1 New Member   M Join Date: Sep 2012 Posts: 3 Rep Power: 4 Hi, Can anyone tell me what is the average boundary layer thickness on the side of a civil aircraft, flying at an average speed? Thanks, Hooman likes this.

 September 26, 2012, 07:10 #2 Member   Join Date: Mar 2009 Posts: 85 Rep Power: 8 Well your question might not result an answer. Do you mean the fuselage by the word "side"? Let's say the flow is laminar and you know the Reynolds number. Then you can estimate the boundary layer thickness from Blasius' solution. But you should think twice about how to use this estimated thickness. Regards

 September 26, 2012, 07:19 #3 New Member   M Join Date: Sep 2012 Posts: 3 Rep Power: 4 I apologise, the question wasn't clear. I mean the side of the aircraft between the nose and the wing. If there is a way to calculate the boundary layer thickness. Thanks,

 September 26, 2012, 07:48 #4 Member   Join Date: Mar 2009 Posts: 85 Rep Power: 8 Still, you can apply what I wrote.

 September 26, 2012, 08:15 #5 New Member   M Join Date: Sep 2012 Posts: 3 Rep Power: 4 Thank you.

 September 26, 2012, 08:16 #6 Senior Member   Gonzalo Join Date: Mar 2011 Location: Argentina Posts: 107 Rep Power: 7 Hello: try to serching for boundary layer thickness calculation on the NTRSīs page. There you can find many reports dealing with that issue. Regards. Gonzalo

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