A sponge-like material that can reduce the noise of combustion could make work environments safer and extend the life of equipment, U.S. researchers say. This technology lessens the noise generated by combustion systems such as those in a jet engine at the source by placing a sponge-like material directly in the flame, University of Alabama mechanical engineer Ajay K. Agrawal, who has patented the material, said. The combustion process in jet engines produces a deafening noise that can also be devastating to the engine, as sound waves can shake the engine and result in mechanical failure, a university release said Tuesday. This porous inert material, a foam made of hafnium carbide and silicon carbide, which can withstand intense levels of heat and pressure, is placed directly into the flame and acts like a sponge for the noise, Agrawal said. The foam allows gases to easily flow so combustion is not interrupted, yet is much quieter. It surrounds the flame, cuts the noise and eliminates the potential for engine instability, he said. "Experimenting with combustion can be quite noisy and unstable, shaking the whole building, but when you put the foam in place, you can talk to the person next to you. It's a night and day difference," Agrawal said. The foam reduces noise at its source, minimizing the need for bulky and expensive modifications to exhaust equipment, he said.
GMT 13:29 2018 Monday ,01 January
Serbia launches probe after toxic waste dumped near BelgradeGMT 19:03 2017 Thursday ,28 December
Pregnant elephant 'poisoned' in Indonesian palm plantationGMT 16:26 2017 Sunday ,24 December
Nepal's two last known dancing bears rescued: officialsGMT 10:51 2017 Sunday ,24 December
Florida orange industry hit by hurricane, diseaseGMT 09:09 2017 Sunday ,24 December
Modern-day amber 'Klondikes' thrive in troubled UkraineGMT 19:23 2017 Saturday ,23 December
Indonesian pangolin faces extinction due to traffickingGMT 11:37 2017 Friday ,22 December
Global warming may boost asylum-seekers in Europe: studyGMT 07:32 2017 Friday ,22 December
Modern-day Mowgli: Indian toddler forges bond with monkeys
Maintained and developed by Arabs Today Group SAL.
All rights reserved to Arab Today Media Group 2025 ©
Maintained and developed by Arabs Today Group SAL.
All rights reserved to Arab Today Media Group 2025 ©
Send your comments
Your comment as a visitor