Drag Coeefficients + Aerodynamic Shape Factors

[spat154]

Hi There,

I am working on the wind loading guide and am at the last stage of calculating design wind pressure for Overhead Lines.

For the calculation of Aerodynamic Shape Factors, I need to find the drag force coefficient for concrete pole.

Is there anyone who has worked on it before who can guide me please.

Thanks.

 

[7anoter4]

Hi spat154
In my opinion drag coefficient is not a problem for a conical pole.
From my experience find pls. attached jpg [something about].
I have not an Overhead Line Mechanical Handbook but I am sure you may find one in your vicinity.
Hope it will be useful.
Best Regards,

 

[wareagle]

The pole is considered a rectangle for this calculation.
Check here

http://www.iaei.org/subscriber/magazine/02_c/other_code.htm

for more information. Search power line wind loading

 

[jghrist]

The pole is considered a rectangle for this calculation.

The link you give does not use a drag coefficient for rectangular poles. There is no drag coefficient directly stated, so I assume they are using 1.0, which is for round poles. A flat surface would use 2.0. I assume that the OP's main concern is the concrete, which is not as smooth as steel. I don't know the answer to that. I'd suggest checking with a concrete pole manufacturer.