◎ 논문제목(국문) : 가솔린 직분사 엔진에서 운전 조건에 따른 공기 유동 특성에 의한 분무 거동 및 점화 채널에 관한 연구
◎ 논문제목(영문) : Study on Behavior of Spray and Spark Channel by Air Flow Characteristics According to Operating Conditions in Gasoline Direct Injection Engine Hoseung Yi and Sungwook Park
◎ 저 자 : 이호승, 박성욱
◎ 논문정보 : 한국분무공학회지, Vol.28, No. 4, pp. 198-206
◎ 게재연월 : 2023-12
◎ 초 록 :
In this study, visualization of in-cylinder spray behavior and spark channel stretching by air flow characteristics depending on engine operating conditions were investigated. For in-cylinder spray behavior, increase in engine rpm did not alter the counter-clockwise air flow direction and location of in-cylinder dominant air flow but increased average air flow velocity, which hindered spray propagation parallel to the piston surface. When injection timing was retarded, direction of in-cylinder dominant air flow was changed, and average air flow velocity was reduced resulting in an increase in spray penetration length and change in direction. For spark channel stretching, increase in air flow speed did not affect spark channel stretch direction but affected length due to increase in spark channel resistance and limitation of energy ignition coil can handle. Change in air flow direction affected spark channel stretch direction where the air flow was obstructed by ground electrode which caused spark channel direction to occur in the opposing direction of air flow. It also affected spark channel stretch length due to change in air flow speed around the spark plug electrode from the interaction between the air flow and ground electrode.
◎ 논문제목(국문) : 가솔린 직분사 엔진에서 운전 조건에 따른 공기 유동 특성에 의한 분무 거동 및 점화 채널에 관한 연구
◎ 논문제목(영문) : Study on Behavior of Spray and Spark Channel by Air Flow Characteristics According to Operating Conditions in Gasoline Direct Injection Engine Hoseung Yi and Sungwook Park
◎ 저 자 : 이호승, 박성욱
◎ 논문정보 : 한국분무공학회지, Vol.28, No. 4, pp. 198-206
◎ 게재연월 : 2023-12
◎ 초 록 :
In this study, visualization of in-cylinder spray behavior and spark channel stretching by air flow characteristics depending on engine operating conditions were investigated. For in-cylinder spray behavior, increase in engine rpm did not alter the counter-clockwise air flow direction and location of in-cylinder dominant air flow but increased average air flow velocity, which hindered spray propagation parallel to the piston surface. When injection timing was retarded, direction of in-cylinder dominant air flow was changed, and average air flow velocity was reduced resulting in an increase in spray penetration length and change in direction. For spark channel stretching, increase in air flow speed did not affect spark channel stretch direction but affected length due to increase in spark channel resistance and limitation of energy ignition coil can handle. Change in air flow direction affected spark channel stretch direction where the air flow was obstructed by ground electrode which caused spark channel direction to occur in the opposing direction of air flow. It also affected spark channel stretch length due to change in air flow speed around the spark plug electrode from the interaction between the air flow and ground electrode.