EARTH: Sand Shouldn't Stand In for Volcanic Ash in Jet Engine Tests
From EARTH Magazine, August 10, 2016 -- In 2010, trans-Atlantic airspace was shutdown, and international travel halted, when Iceland's Eyjafjallajökull erupted, spewing ash into the air. This was an expensive decision, triggered by the threat ash posed to aircraft, crews and passengers. When ash enters an aircraft turbine, which typically can reach temperatures of up to 2,000 degrees Celsius, the ash can melt, damaging the engines in midflight.
For decades, sand has been used to simulate the effects volcanic ash may have on aircraft, but in a new study covered by EARTH Magazine, scientists used samples of real volcanic ash from volcanoes of different eruptive styles from around the world. The experiments demonstrated big differences between the compositions and melting points of sand versus ash. To find out what this means for geoscience and the airline industry, read the August issue of EARTH Magazine: http://www.earthmagazine.org/article/sand-shouldnt-stand-volcanic-ash-je....
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