Turbomachinery Aerodynamics

Question 17: In axial compressor rotor airfoil characteristics are harnessed in the following manner

Lift and Drag - both are used for doing work       

Only lift is used for doing work, drag is the loss                       

Lift and Drag – both also produce thrust                   

Prof. Bhaskar Roy, Prof. A M Pradeep, Department of Aerospace, IIT Bombay