Fluid Force Direction on Airfoil: Compressor vs. Turbine Design

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The discussion focuses on determining the direction of the force exerted by fluid on an airfoil in compressor and turbine designs. In the first case, the force direction for a compressor is downward, while for a turbine, it is upward. Conversely, in the second case, the force direction for a compressor is upward, and for a turbine, it is downward. There is uncertainty regarding the accuracy of these directions, particularly in the second case, due to unclear figures. Overall, the participants are seeking clarification on the force directions and their consistency across both cases.
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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.
 

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