Detailed measurement on propagating flame of methane-oxygen mixture by densely installed multiple ion-probes

Abstract

Multiple ion-probes method has an advantage on detailed measurement for high-intensity combustion including engine combustion, oscillation combustion and so on. Multiple ion-probes are installed individually on the surface of the confinement wall of the combustion chamber. Detailed behavior of the flame propagation along the chamber wall can be reproduced by the datasets of the flame arrival time detected by individual ion-probes. Main target of this series of experiment is to clarify the performance of this multiple ion-probes measurement method for various type of propagating flames. As noted above, the propagating characteristics can be changed by changing the portion of the dilatant gases for methane oxygen mixture. No dilution results fastest speed and relatively stable propagation, and heavier dilution provides lower speed and turbulent propagation. The results of the series of experiment obviously shows that constructed measurement system can capture precisely both extremes of those tested propagating flames.