Critical Dimensions For Mixing Venturi?

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Critical Dimensions For Mixing Venturi? The Lightning Stalker 12-09-2006
Posted by The Lightning Stalker on December 9, 2006, 8:23 pm
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Hello. Does anyone know what parts of a gas inspirator (venturi)
primarily affect the fuel/air ratio? I've tried searching high and low
for the answer to this and can't find it anywhere. It seems like a
black art or something.

See, what I'm doing is building a reproduction of a pest scaring device
which makes a loud noise to scare away birds and animals from crops,
just in case anyone was curious. The goal is to have an adjustable
fuel/air ratio to vary the flame speed. This changes the "tone" that
is produced. Maximum flame speed occurs when the mixture is
stoichiometric and tapers off on either side. I figured someone on
here would know about this because sometimes blacksmiths make their own
custom burners.

Thank you,
Robert


Posted by on December 9, 2006, 11:43 pm
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> Hello. Does anyone know what parts of a gas inspirator (venturi)
> primarily affect the fuel/air ratio? I've tried searching high
> and low for the answer to this and can't find it anywhere. It
> seems like a black art or something.

Yeah. :/

> See, what I'm doing is building a reproduction of a pest scaring
> device which makes a loud noise to scare away birds and animals
> from crops, just in case anyone was curious. The goal is to have
> an adjustable fuel/air ratio to vary the flame speed. This
> changes the "tone" that is produced. Maximum flame speed occurs
> when the mixture is stoichiometric and tapers off on either side.
> I figured someone on here would know about this because sometimes
> blacksmiths make their own custom burners.
> Thank you,
> Robert

Cool question! :)

Along the same lines I'd like to read about carburetors where the
author really knows his stuff. Already read the "common" books on
the subject. ...or should be "skirting" the subject?

I read my "yardsale" Encycolopedia Britanica from the mid 50's about
flame and flame fronts etc first-thing then went to researching it
further. Never ran across anything that was anywhere near as good
as the first.

No kidding.

Suspect you need to look for "old" infomation.

Either way, post your findings here, so we can read it too, ok? :)

Alvin in AZ

Posted by The Lightning Stalker on December 12, 2006, 6:05 pm
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> Either way, post your findings here, so we can read it too, ok? :)

I believe I have found what I was looking for thanks to help from
someone in alt.crafts.glass. It's called the North American Combustion
Handbook and is available from amazon.com.

http://www.amazon.com/North-American-combustion-handbook-industrial/dp/0960159614

Cheers,
Robert

alvinj@XX.com wrote:
> > Hello. Does anyone know what parts of a gas inspirator (venturi)
> > primarily affect the fuel/air ratio? I've tried searching high
> > and low for the answer to this and can't find it anywhere. It
> > seems like a black art or something.
>
> Yeah. :/
>
> > See, what I'm doing is building a reproduction of a pest scaring
> > device which makes a loud noise to scare away birds and animals
> > from crops, just in case anyone was curious. The goal is to have
> > an adjustable fuel/air ratio to vary the flame speed. This
> > changes the "tone" that is produced. Maximum flame speed occurs
> > when the mixture is stoichiometric and tapers off on either side.
> > I figured someone on here would know about this because sometimes
> > blacksmiths make their own custom burners.
> > Thank you,
> > Robert
>
> Cool question! :)
>
> Along the same lines I'd like to read about carburetors where the
> author really knows his stuff. Already read the "common" books on
> the subject. ...or should be "skirting" the subject?
>
> I read my "yardsale" Encycolopedia Britanica from the mid 50's about
> flame and flame fronts etc first-thing then went to researching it
> further. Never ran across anything that was anywhere near as good
> as the first.
>
> No kidding.
>
> Suspect you need to look for "old" infomation.
>
> Either way, post your findings here, so we can read it too, ok? :)
>
> Alvin in AZ


Posted by on December 14, 2006, 4:56 am
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> I believe I have found what I was looking for thanks to help from
> someone in alt.crafts.glass. It's called the North American
> Combustion Handbook and is available from amazon.com.
> Cheers,
> Robert

Cool thanks! :) I believe I'll be able to borrow it from the UofA
library. Anybody going for the $15 copy? :)

Alvin in AZ

Posted by The Lightning Stalker on December 16, 2006, 4:40 am
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alvinj@XX.com wrote:
> > I believe I have found what I was looking for thanks to help from
> > someone in alt.crafts.glass. It's called the North American
> > Combustion Handbook and is available from amazon.com.
> > Cheers,
> > Robert
>
> Cool thanks! :) I believe I'll be able to borrow it from the UofA
> library. Anybody going for the $15 copy? :)
>
> Alvin in AZ

Could you let me know whether it has the info I'm looking for if you
get it? Some are saying it doesn't and others say it does.

Thanks,
Robert



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