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Drag Coeefficients + Aerodynamic Shape Factors

Drag Coeefficients + Aerodynamic Shape Factors

Drag Coeefficients + Aerodynamic Shape Factors

(OP)
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.

RE: Drag Coeefficients + Aerodynamic Shape Factors

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,

RE: Drag Coeefficients + Aerodynamic Shape Factors

Quote:

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.

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