Questions tagged [combustion]
70 questions
6
votes
2 answers
Why afterburners are needed instead of burning more fuel inside the turbine?
I'm reading this article on afterburners:
https://www.airspacemag.com/flight-today/how-things-work-afterburners-18481403/
It says in the article:
A typical jet engine uses only about half the oxygen it ingests, leaving a large amount of potential…
S. Rotos
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3
votes
1 answer
Derivation for the Formulas of the Approximate Ultimate Analysis of Coal
I've been given the following to memorize; But my head is so crammed with many others that I need to find another way; Are these formulas Empirical? I was hoping that if I derive it from a much more primitive form; I maybe able to remember it.
$${…
james
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3
votes
3 answers
Advice on simple spark ignition system
I'm looking for any tips on a simple and cheap means of generating a regular spark for ignition of propane in air, could be electrical or other but needs to be simple and fairly reliable.
Criteria are :
needs to remotely ignite/re-ignite a…
Chris Johns
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1
vote
1 answer
Trouble with Valveless PulseJet
My friend and I are working on building a valveless pulsejet out of sheet metal. We initially built a small one (a few feet in length) using the below dimensions:
The issue was that we were unable to get it running without compressed air. When we…
andycate
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-1
votes
1 answer
Calculating Mass Fractions of a Hydrogen and Oxygen Gas Mixture Pre Ignition
I am trying to calculate mass fractions of a Hydrogen Oxygen gas mixture as a function of equivalence ratio before ignition. My work is the following:
Equivalence Ratio:…
Unique Worldline
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