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모하메드 하산(H.Mohamed),고영성(Y.S.Ko),윤금중(K.J.Yoon),정석호(S.H.Chung) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.5_1
In this study, a new type of laser-induced ignition was developed. Without focusing laser beam, it was possible to ignite combustible mixtures by reducing the laser beam diameter to a small value and directing that beam into a small conical cavity. Shadowgraphs for the early stages of combustion process showed that a hot gas jet is ejecting from the cavity, especially when burning lean mixture. After a very short time, the hot gas jet had finished issuing and the flame behavior is quite similar to flame propagation initiated by a conventional spark plug. This type of ignition exhibits more rapid and a higher maximum pressure rise than center ignition with a significant decrease in the combustion duration. Also, the combustion process with this type of ignition was simulated using a part of KIVA-II and good agreement between experimental and calculated results of temperature distribution was obtained.<br/>