Researchers have theoretically linked ignition and deflagration in a combustion system, unlocking new configurations for stable, efficient combustion engines due to the possible existence of any number of steady-state solutions.
, researchers from Tohoku University theoretically linked ignition and deflagration in a combustion system, unlocking new configurations for stable, efficient combustion engines due to the possible existence of any number of steady-state solutions.
Combustion dynamics involves complex coupled fluid and chemical reactions. Researchers use computational fluid dynamics to help them better understand and control the process. The working theory up to this point held that a steady-state solution exists only when the inlet velocity matches either the velocity of the deflagration wave or the velocity of the detonation wave -- a shock reaction where the exiting flames travel at supersonic speeds.
"Contrary to the prevailing view that only a single steady-state solution exists for deflagration waves in subsonic one-dimensional systems, our approach posits an infinite number of such solutions as autoignitive reaction waves, asserting that ignition and flame are intrinsically linked," Morii said.
"We propose that an infinite number of steady-state solutions exist for the autoignitive reaction wave, even in supersonic conditions," Morii said. While theoretical and numerical results have provided a new engine concept, it has not yet been experimentally verified. The team, therefore, plans to apply the research findings to an actual engine through further experimental verification through joint research.Researchers report they have directly observed a prototypical version of a class of molecules central to environmental and combustion chemistry. This new knowledge is important to climate change ...
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