1 1 1 T 1 









UNSKEWEO 





^v P 



""ESS 



- 



OEOMETHV FOR MSRDC MODEL 

 EP THICKNESS 



MM s.^ ^"-- — 



- 



" 



'^ 



" 



- 





■ 



- 





- 









^*~~ """"^^^S^v 



X CAMBER RATIO 



- 



- 



~~-^~— ~- 



" 



- 





" 





07 08 Oi 





In Figure 7, blade pressure-coefficient distributions 

 on the warped, skewed and unskewed blades are shown for 

 three radii: one near the hub, one near mid-span and one 

 near the tip. The major difference in pressure distributions 

 occurs near the hub, where the warped blades have greater 

 suction on both sides of the blade, and hence a greater 

 tendency to cavitate when the local pressure reaches the 

 vapor pressure. 



In Figure 8, the meanline shapes for these blades at 

 the same three radii are shown. The greatest changes in 

 meanline shape occur at the root but are significant all along 

 the radius. 



In Figure 9, the non-linear pressure distribution (from 

 Equations (66) and (68)) and meanline shape are shown at 

 x R = 0.669 for the same variations of chordwise load and 

 thickness distributions shown in Figure 5 for a warped 



X„, FRACTION OF TIP RADIUS 



Fig. 4 Effect of skew and rake on pitch 

 and camber values 



X R . FRACTION OF TIP RADIUS 



Fig. 5 Effect of chordwise load and thickness 

 on pitch and camber values 



X R . FRACTION OF TIP RADIUS 



Fig. 6 Effect of orientation of shed vortex sheet 



and blade reference surface on pitch 



and camber values 



X_. FRACTION OF CHORD 



Fig. 7 Pressure distribution at design 

 for three blades 



17 



