Johnsson and Stfntvedt 



APPENDIX A 



CHORDWISE PRESSURE DISTRIBUTION, METHOD OF CALCULA- 

 TION 



From [_14j and f 19 J we have for the contributions to the induced 

 velocities : 



1 . Velocity distribution due to blade thickness distribution . 



Au^x, z) 



U 



NO 



s (2) 

 ,. (s (1) (x) - Mt . f(n) . -j^M ) . cosU T n) 



S (x) 



S^ 

 S (x) 



(1) 



S (7) (x) 



1 + 



(x) (x)_ 



_ cos (1 -M T )ft 



lr\ dz 



s< 5 > &■.■+■• 



dx 



= profile thickness ordinates 



= camber ordinates 



U 



NO 



= U . cos a. cos Q 



ft = effective skew angle 



t = correction factor due to blade thickness taper 



M T and f(fi) = factors taking account of the effect of the centre 

 section and the tip region 



608 



