WASHINGTON, Oct. 18, 2017 - Sandia National Laboratories has disclosed new research aimed at developing cooler burning engines. Researchers believe the innovation could enable better engine designs with higher efficiency and fewer emissions. Mechanical engineer Jackie Chen and colleagues Alex Krisman and Giulio Borghesi recently identified the novel behavior of a key, temperature-dependent feature of the ignition process – called a cool flame – in the fuel dimethyl ether. “We’re trying to quantify the influence of cool flames in stratified turbulent jets during the ignition and flame stabilization processes. The insights gleaned will contribute to more efficient, cleaner burning engines,” Chen said. The cool flame burns at less than 1,150 degrees Kelvin (1,610 degrees Fahrenheit), about half the typical flame burning temperature of 2,200 degrees Kelvin.
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