NACA 4 and 5 digit modified eqations

Tom A · February 9, 2012, 10:11

Hello, I want to examine several types of foils in FLUENT but I am having trouble making the geometry for NACA 4 digit modified and NACA 5 digit modified foils. I have made equations for calculating the coordinates of the standard 4 and 5 series foils but the equations for the modified versions are not making sense to me.

http://www.pdas.com/naca456pdas.html

This website has the equations, I just cant figure out how to use them. Specifically how to find the coefficients in the 4-digit thickness function.

Can anyone here explain them in greater detail or even provide a sample calculation?

Thanks,

Tom

Martin Hegedus · February 9, 2012, 10:16

Why don't you download the code (NACA456) from pdas? http://www.pdas.com/naca456.html

Tom A · February 9, 2012, 10:23

I actually did not even notice that was there. Thanks. I would still like to know how it is calculated though its really been bothering me.

rwryne · February 9, 2012, 11:12

Alternatively, this site will let you enter the parameters and give you points:

http://www.mh-aerotools.de/airfoils/javafoil.htm

February 9, 2012, 10:11	NACA 4 and 5 digit modified eqations	#1
Tom A New Member Tom Join Date: Jan 2012 Posts: 11 Rep Power: 14	Hello, I want to examine several types of foils in FLUENT but I am having trouble making the geometry for NACA 4 digit modified and NACA 5 digit modified foils. I have made equations for calculating the coordinates of the standard 4 and 5 series foils but the equations for the modified versions are not making sense to me. http://www.pdas.com/naca456pdas.html This website has the equations, I just cant figure out how to use them. Specifically how to find the coefficients in the 4-digit thickness function. Can anyone here explain them in greater detail or even provide a sample calculation? Thanks, Tom

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February 9, 2012, 10:16		#2
Martin Hegedus Senior Member Martin Hegedus Join Date: Feb 2011 Posts: 500 Rep Power: 19	Why don't you download the code (NACA456) from pdas? http://www.pdas.com/naca456.html

February 9, 2012, 10:23		#3
Tom A New Member Tom Join Date: Jan 2012 Posts: 11 Rep Power: 14	I actually did not even notice that was there. Thanks. I would still like to know how it is calculated though its really been bothering me.

February 9, 2012, 11:12		#4
rwryne Senior Member Ryne Whitehill Join Date: Aug 2009 Posts: 312 Rep Power: 18	Alternatively, this site will let you enter the parameters and give you points: http://www.mh-aerotools.de/airfoils/javafoil.htm