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Effects of Propellant Phases on Atmospheric Spray Characteristics of a Pintle Injector for Throttleable Rocket Engines
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  • Journal title : Journal of ILASS-Korea
  • Volume 21, Issue 1,  2016, pp.13-19
  • Publisher : Institute for Liquid Atomization and Spray Systems-Korea
  • DOI : 10.15435/JILASSKR.2016.21.1.13
 Title & Authors
Effects of Propellant Phases on Atmospheric Spray Characteristics of a Pintle Injector for Throttleable Rocket Engines
Yu, Kijeong; Son, Min; Radhakrishnan, Kanmaniraja; Kim, Heuy Dong; Koo, Jaye;
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 Abstract
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.
 Keywords
Pintle injector;Momentum ratio;Spray angle;Propellent phase;
 Language
Korean
 Cited by
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