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Re: Wind tower design
- To: seaint(--nospam--at)seaint.org
- Subject: Re: Wind tower design
- From: Daryl Richardson <h.d.richardson(--nospam--at)shaw.ca>
- Date: Mon, 19 Nov 2007 11:56:04 -0700
Non circular shapes are
also subject to vortex shedding. What you need is a non prismatic, or
tapered, section, or some type of spoilers.
H. Daryl Richardson
----- Original Message -----
Sent: Monday, November 19, 2007 10:53
Subject: Re: Wind tower design
Thanks for the feedback Harold,
I am looking at the
probability of wind tunnel testing, as well as theoretical studies to
determine the dynamic properties.
I will be asking the wind experts
about vortex shedding. I will probably be using a non-circular
cross-section to reduce the vortex shedding, but I don't yet know if a
hexagonal or pentagonal shape is better than circular. I believe the
best would be pentagonal, but that will be a discussion with the wind tunnel
On Nov 19, 2007 12:17 PM, Harold Sprague <spraguehope(--nospam--at)hotmail.com
I doubt that you will find any sort of code or design guide on this
topic. I would suggest that a wind tunnel study be conducted
especially if this is for operational wind load characteristics. If
this is for extreme wind effects, I would think that the dominate
issue will be the vortex shedding on the mast.
Date: Fri, 16 Nov 2007 22:02:19 -0500
Subject: Wind tower design
Has anybody done any wind tower design work
? I am doing some preliminary work on a concrete tower design, and I
am thinking about the dynamic behaviour
and the effect of the passage
of the blade when it passes in front of the tower. Does anyone have
any information or ideas on this ?
The Germans and the Japanese
have actually built some concrete towers already. Apparently steel
towers are at about their height limit now, and the way to greater
efficiency and bigger turbines leads to higher towers, which will probably
be in concrete.
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