“The Defense Advanced Research Projects Agency (DARPA) is known for making odd scientific advances ranging from hypersonic unnamed rockets to bionic prosthetic limbs to insect-sized reconnaissance drones.
But recently DARPA has made a interesting advancement in the field of fire suppression. Using two speakers arranged on either side of an open liquid fuel flame, an acoustic field was emitted and engulfed the fire.
‘The sound increases air velocity, which then thins the area of the flame where combustion occurs, known as the flame boundary.’ This make the flame weak and much easier to douse. Another wonderful thing about this: it’s not even that loud!
DARPA began its testing in 2008, stating that despite extensive research in this area, there have been no new methods for extinguishing and/or manipulating fire in almost 50 years. The agency plans to expand on this experiment and try to make it successful on a practical scale.”
Chuckles breaks the 4th wall in reverse by buying in:
Yes, sounds familiar from years ago. I used to be very interested in the opposite, which is ‘flame loudspeakers’, where you stick a couple of electrodes (bits of copper wire or similar) into a flame or fire, park about 3-400 volts DC across them to ionise everything, and then superimpose the amp output on top of the DC. Works a treat.
And then, there’s always this:
So James will also buy in and asks if we could perhaps all get together to try building one of these?