Please search for the axial fan tutorial on YouTube. You will find examples very similar to what you are trying to attempt. This should help you get to the right model set-up.
Could you please follow one of these examples and see if you can verify your model set-up? Please note that these are old videos and you might have some convergence issues with these settings. But, this set-up should provide you a good learning experience.
Also, please verify that the min orthogonal quality of your mesh is greater than 0.1 and max skewness is less than 0.9.
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