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Discover the structure of the mysterious blue flame



Discover the structure of the mysterious blue flame

A team of researchers working at the University of Maryland has discovered the structure of the mysterious blue flame. In their journal work Advances in science, the group describes the use of computer simulations to determine the structure of the unique flame type.

Back in 201

6, a team of researchers discovered what they described as a whirling blue flame while they were studying the properties of liquid fuel floating in water. They had added fuel to a tank full of water that was locked in a space that generated a vortex. They described a fire that at first looked like a tornado, but soon after, settled on what they called a blazing blue flame. They noticed at the time that its paint suggested it was very efficient, burning fuel without creating soot – a property that could be useful in cleaning up oil spills. Since then, others have looked at the unique type of flame, but no one had tried to understand its structure. In this new endeavor, researchers took a closer look at the flame and discovered that there were actually three types of flames that had melted into one.

To learn more about the nature of the blue rotation flame, the researchers created computer simulations using known conditions to generate them. Then they slowly adjusted the settings until they could not generate the flame virtually. They found that the flame was actually the result of three known types of flame melting: those with an invisible external flame, which occurs when there is less fuel than oxygen in the mixture – and two that had internal flame types visible in which higher fuel ratios are more common.






A set of videos showing the blue vortex from the numerical simulation (center) of this paper with a blue vortex from an experiment (left and right). All three videos have reduced speed. Credits: Chung et al., Sci. Adv. 2020; 6: eaba0827

Researchers suggest that knowing that the blue flame is composed of other types of flames may allow them to form in more controllable circumstances – and should allow you to pass the tornado-shaped phase, which is a matter of well, they note, because such flames are dangerous, as has been observed in recent years in fires. They also suggest that due to their efficiency, such flames can be used for cleaner combustion processes.

UMD researchers identify the structure of blue vortices

(A) Stable blue vortex. (B) Slightly unstable blue rotation with soot in the middle, suggesting a bubble way of breaking the vortex. Credit: H. Xiao, China University of Science and Technology


The flame design in space can lead to fire without soot


More information:
JD Chung el al., “The structure of the blue vortex revealed,” Advances in science (2020). progress.sciencemag.org / lookup… .1126 / sciadv.aba0827

© 2020 Scientific Network X

citation: Discovery of the mysterious blue rotation flame structure (2020, August 13) taken August 13, 2020 from https://phys.org/news/2020-08-revealing-mysterious-blue-flame.html

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