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#Post#: 5349--------------------------------------------------
Re: Newbie questions....turbine design
By: maximoney1 Date: January 31, 2015, 6:29 am
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Thought this was interesting for idea's...different
stresses/loads, but potentially adaptable???
HTML https://www.youtube.com/watch?v=qJZoqGHAIDE
and extended version..
HTML https://www.youtube.com/watch?v=karr67ZYho4
#Post#: 5398--------------------------------------------------
Re: Newbie questions....turbine design
By: maximoney1 Date: February 2, 2015, 12:33 pm
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Edited.
#Post#: 5539--------------------------------------------------
Re: Newbie questions....turbine design
By: maximoney1 Date: February 17, 2015, 12:11 pm
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Another design aspect i am wrestling with is...
I'm thinking about the weight aspect of the turbine, looking to
do a dual magnet rotor on thicker plates(better heat
dissapation/stabilty/accuracy of plate surface, accuracy of gap
adjustment etc etc), which considerably adds to the weight,
which in turn is connected to the turbine/airfoils. This weight
however is going to be loaded down through a 1 inch stainless
rod, so i am thinking the extra weight might not be so much of
an issue (on the start up - more effect on responsiveness),
since it is concentrated (loaded) over a small diameter(one
inch). The turbine airfoils and mounting structure on the other
hand need to be as light and strong as possible, to reduce
bending forces and stresses(i'm looking at a 60inch diameter).
My point being, that with the leverage from that sort of radius,
acting on a one inch pivot point, the extent of the negative
effects from extra weight rotors might be negligible.
Is my thinking correct or just a load of cock?
Thoughts anyone?
cheers jim.
#Post#: 5543--------------------------------------------------
Re: Newbie questions....turbine design
By: sut Date: February 17, 2015, 2:07 pm
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I think your correct to an extent, but to me weight is a big
factor no matter where its at ! you still have to get all the
mass turning .
#Post#: 5544--------------------------------------------------
Re: Newbie questions....turbine design
By: maximoney1 Date: February 17, 2015, 2:24 pm
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cheers SUT.
#Post#: 5553--------------------------------------------------
Re: Newbie questions....turbine design
By: sut Date: February 18, 2015, 9:44 am
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Don,t get me wrong your idea sounds good and possible to work
fine, just be aware of the weight . When you move the weight
into the center I feel the only thing you take out of the
equation is centrifugal force being lessened on the windmill.
What you could try is take some weight and place it on the
center of windmill (existing one ) and see how it effects start
up and response ( trial and error is the best way ) Or if @CG
could try this easily since he has one in the basement in the
wind tunnel and has so much data on tsr on hand .
#Post#: 5562--------------------------------------------------
Re: Newbie questions....turbine design
By: maximoney1 Date: February 18, 2015, 10:58 am
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Eagerly awaiting those results CG ;D
#Post#: 5567--------------------------------------------------
Re: Newbie questions....turbine design
By: maximoney1 Date: February 18, 2015, 11:52 am
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@SUT
If (BIG IF), the weight directly over the central bearing does
have a much lesser impact on on start up RPM etc etc, then i can
probably propose another mount system, which might enable
lighter, stronger and longer airfoils, but is entirely dependent
on weight transfer characteristics to the hub and degree of
impact. If i'm correct in my thinking(rarely lol), then it
should also give a 'less' disrupted airflow through the turbine.
Something for me to work on later. (so many possibilities eh!)
#Post#: 5575--------------------------------------------------
Re: Newbie questions....turbine design
By: maximoney1 Date: February 18, 2015, 5:46 pm
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Yes CG, always out of funds... :'(
Only trouble is, sometimes smaller scale compounds inaccuracies,
obscuring the true results. I gonna go for my first build now,
started making coils. Gettin brain freeze of late, so just goin
for it....wish me luck...lol ::)
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