How to measure incidence angle

pks126 · March 12, 2013, 07:06

Dear All,

I have a result file in cfx & i have to calculate incidence angle at Tip LE of a compressor blade.How to calculate it in cfx-post?

Thanks,

oj.bulmer · March 13, 2013, 09:07

Can you post an image to make your question clear?

OJ

pks126 · March 13, 2013, 11:18

thanks bulmer
can you tell me how to calculate incidence angle for airfoil or compressor blade numerically then i can try this in cfx.
regards,

oj.bulmer · March 13, 2013, 11:28

This is what comes to mind. How about measuring actual values of u, v, w at the tip of the blade etc? You can then get a vector in 3D space. From the trigonometry and orientation of your blade coordinate system with this vector, you can calculate the angle. If you are trying to find on the angle of incidence on the edge, you may want to take average values of u,v, w at that and then figure out the vector.

Not an elegant way but should give you an idea.

OJ

pks126 · March 13, 2013, 11:37

i have values of u v w @ LE point ....but this is little difficult process ....
thanks

March 12, 2013, 07:06	How to measure incidence angle	#1
pks126 New Member Prashant Kumar Singh Join Date: Jun 2012 Location: IIT Bombay Posts: 19 Rep Power: 13	Dear All, I have a result file in cfx & i have to calculate incidence angle at Tip LE of a compressor blade.How to calculate it in cfx-post? Thanks,

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March 13, 2013, 09:07		#2
oj.bulmer Senior Member OJ Join Date: Apr 2012 Location: United Kindom Posts: 473 Rep Power: 20	Can you post an image to make your question clear? OJ

March 13, 2013, 11:18		#3
pks126 New Member Prashant Kumar Singh Join Date: Jun 2012 Location: IIT Bombay Posts: 19 Rep Power: 13	thanks bulmer can you tell me how to calculate incidence angle for airfoil or compressor blade numerically then i can try this in cfx. regards,

March 13, 2013, 11:28		#4
oj.bulmer Senior Member OJ Join Date: Apr 2012 Location: United Kindom Posts: 473 Rep Power: 20	This is what comes to mind. How about measuring actual values of u, v, w at the tip of the blade etc? You can then get a vector in 3D space. From the trigonometry and orientation of your blade coordinate system with this vector, you can calculate the angle. If you are trying to find on the angle of incidence on the edge, you may want to take average values of u,v, w at that and then figure out the vector. Not an elegant way but should give you an idea. OJ

March 13, 2013, 11:37		#5
pks126 New Member Prashant Kumar Singh Join Date: Jun 2012 Location: IIT Bombay Posts: 19 Rep Power: 13	i have values of u v w @ LE point ....but this is little difficult process .... thanks