NUMERICAL SIMULATIONS OF LEAN PROPANE-AIR FLAMES PROPAGATING IN CIRCULAR TUBES UNDER QUENCHING CONDITIONS
作者： Artur Gutkowski
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摘要: Flame extinction in internal combustion engines can be observed when a flame front enters small gap between the cylinder and piston or above rings. This phenomenon is caused by interaction of with walls. Cooling reaction zone wall reason for extinction. Simplifying problem to propagation premixed laminar narrow channels isothermal allowed employing numerical methods analyze this phenomenon. The aim work was examine behavior during its circular tube. A analysis freely propagating conducted. In study, quenching propane/air tube investigated numerically. chemistry modeled one-step overall reaction. considerations are limited flames downwards lean propane-air mixtures. Quenching diameter as function equivalence ratio determined. One most important parameters - velocity (under conditions) compared adiabatic burning limit predicted Zeldovich. It found satisfactory agreement calculations theoretical considerations. Numerical results show also that there close dependence preheat dead space wider
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