Abstract
In this study, we experimentally investigated the effects of burnt gas jet ignition on ethanol spray combustion using a constant volume combustion vessel with a sub chamber. The ignition and combustion phenomena were observed by using a high-speed video camera, and combustion pressure history was measured as well. In case of burnt gas jet ignition, compared with a conventional spark plug ignition, stronger luminous flames were observed, and rate of pressure rise and maximum overpressure much increased. Moreover, it was confirmed that measured HCHO concentration of the burnt gas in the combustion vessel remained at low level although the amount of ethanol related to combustion reaction increased. It is mainly due to the strong turbulent mixing effects of the hot burnt gas jet and the spray flows.
