Determination of indicial lift and moment of a two-dimensional pitching airfoil at subsonic mach numbers from oscillatory coefficients with numerical calculations for a Mach number of 0.7

Bernard Mazelsky
naca-tn-2613
Feb 1952


The reciprocal equations relating the lift and moment acting on an airfoil due to harmonic oscillations in compressible flow to the indicial lift and moment functions for a pitching airfoil are determined. Two indicial functions are required to describe completely the lift or moment on the airfoil; one function is used for describing the effects due to the angular position of the airfoil whereas the second function is used for describing the effects due to pitching velocity.

An Adobe Acrobat (PDF) file of the entire report:
http://naca.central.cranfield.ac.uk/reports/1952/naca-tn-2613.pdf