Effect of a Taper Intake Port on the Combustion Characteristics of a Small-Scale Rotary Engine

Taper intake ports are effective in improving the charging efficiency of small-scale rotary engines (REs), but it is unclear how their structural parameters affect in-cylinder flow field and combustion characteristics. For this reason, effects diameter-length ratio (D/L) an port on characteristics a RE were numerically investigated by utilizing three-dimensional computational fluid dynamics (CFD) model. The results showed that pressure did not follow simple single-directional trend with D/L port, was divided into three levels, where peak at its maximum 0.6 minimum 0.8. gas flows different values all unidirectional, they made difference vortexes formed leading side chamber RE, which main factor affecting performance. = maintained for long period time, thus promoting propagation flame advancing center gravity combustion. So, heat release rate cylinder increased price larger increment nitrogen oxide formation.