Fluid Force Direction on Airfoil: Compressor vs. Turbine Design

[krnhseya]

Homework Statement

Find the direction of the force exerted by the fluid to the airfoil.

Homework Equations

N/A

The Attempt at a Solution

I think that's the forces direction (x is horizontal and z is vertical) for 2 cases. In case I am dealing with either the compressor or turbine, will the solutions change?

I know that:
-If case 1 is designed for the compressor, it will move downward and if case 1 is designed for the turbine, it will move upward.
-If case 2 is designed for the compressor, it will move upward and if case 2 is designed for the turbine, it will move downward.

I am guessing my directions (forces exerted by the fluid on the airfoil/blade) stay the same.

Are my directions right in those 2 cases? Thank you.

 

[dineshnaveen]

the first case is right i think but i didn't understand the second case completely the given figures are not clear

 

[krnhseya]

the first case is right i think but i didn't understand the second case completely the given figures are not clear

It's exactly the same except the pressure side and suction side reversed. I'd guess that the z direction has to change but then I am not so sure that first case is even right.