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a question about conical flame.

Posted: Wed Aug 07, 2013 1:19 pm
by rezvane
Hey everyone,

A stoichiometric fuel-air mixture flowing in a Bunsen burner forms a well-defined conical flame. The mixture is then made leaner. For the same flow velocity in the tube, how does the cone angle change?


Thanks in advance :)

Re: a question about conical flame.

Posted: Mon Aug 12, 2013 3:49 pm
by GrahamKemp
A leaner mixture means a narower base to the cone - thus a smaller cross sectional area; a circle measured by radius.

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A = π r{2}
.

Flow rate is measured as volume per time unit.

For a cone, volume is measured as

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V = π r{2} h/3
.

Hence if the same volume is flowing through a narrower base, the height of the cone will be pushed up; it will be inversely proportionate to the square of the radius.

If the height is pushed up so as the radius decreases, then the appeture will become accuter.

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 tan(θ/2) = r/h

how does the cone angle change?

Posted: Thu Oct 03, 2013 4:26 pm
by Palphysiotherapy
Because volume flow in tube is in same ratio so height of the tube increase.

Re: a question about conical flame.

Posted: Thu Sep 30, 2021 3:02 am
by osteorehab
What is Laminar Premixed Flames and Burning Velocity

Physiotherapist in Gurgaon