가변 추력용 핀틀 분사기에서 추진제 상에 따른 상압분무 특성

• Published in: 한국분무공학회지 Vol. 21; no. 1; pp. 13 - 19
• Main Authors: 유기정, Kijeong Yu, 손민, Min Son, Kanmaniraja Radhakrishnan, 김희동, Heuy Dong Kim, 구자예, Jaye Koo
• Format: Journal Article
• Language: Korean
• Published: 한국분무공학회 31.03.2016; 한국액체미립화학회
• Subjects: Momentum ratio; Pintle injector; Propellent phase; Spray angle; 기계공학; 분사각; 운동량비; 추진제 상; 핀틀 분사기
• ISSN: 1226-2277; 2288-9051

Atmospheric spray characteristics were experimentally compared between liquid-gas and liquid-liquid sprays of a pintle injector. In order to study spray characteristics, water and air were used as the simulants and the visualization technic was adopted. Spray images were acquired by using a backlight method by a high-resolution CMOS camera. As a result, when the pintle opening distance increased, liquid sheets became unstabled and fluttering droplets increased. In the liquid-gas case, the breakup performance increased as the pressure of gas injected from the annular orifice increased. In the liquid-liquid case, atomization efficiency decreased as the pressure of liquid injected from the annular orifice increased. Spray angles presented a similar trend between two cases. At the same momentum ratio, the spray angle of liquid-liquid case was lower than the angle of liquid-gas case.