Specific features of n-decane vapors self-ignition in air at temperatures of 600–800 K
https://doi.org/10.29235/1561-8323-2020-64-6-747-756
Abstract
Experiments of n-decane/air self-ignition at the temperature range 600–800 K were carried out by rapid compression machine. It allowed obtaining temperature-concentration limits of transition from single-stage to two-stage ignition. High-speed video recording has let established that hot stage ignition always initiates near the piston surface or quartz window. These locations depend on gas temperature. Combustion of the test mixture occurs in the entire volume after that. Couple sequential photos of cool flame shows that it starts same near piston surface and has a complicated volumetric structure caused by the roll-up gas vortex. It is shown that partial n-decane pressure increasing during compression causes the non-equilibrium condensation process near the inner surfaces of combustion chamber. This leads to significant redistribution of n-decane concentration and determines local characteristics self-ignition of n-decane/air mixture.
About the Authors
V. V. Leschevich
A. V. Luikov Heat and Mass Transfer Institute of the National Academy of Sciences of Belarus
Belarus
Belarus
Leschevich Vladimir V. – Ph. D. (Physics and Mathematics), Senior researcher
15, P. Brovka Str., 220072, Minsk
O. G. Penyazkov
A. V. Luikov Heat and Mass Transfer Institute of the National Academy of Sciences of Belarus
Belarus
Belarus
Penyazkov Oleg G. – Academician, D. Sc. (Physics and Mathematics), Director
15, P. Brovka Str., 220072, Minsk
S. Yu. Shimchenko
A. V. Luikov Heat and Mass Transfer Institute of the National Academy of Sciences of Belarus
Belarus
Belarus
Shimchenko Sergey Yu. – Researcher
15, P. Brovka Str., 220072, Minsk
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