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Prediction of the internal flow in a pintle nozzle for LPG engine
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 Title & Authors
Prediction of the internal flow in a pintle nozzle for LPG engine
Jeong, Hong-Cheol; Kim, Byeong-Cheol;
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 Abstract
The use of "clean fuels" such as butane, propane, and mixtures of these (LPG) is an attractive way to reduce exhaust emissions. In this study internal flow of the pintle type injector for LPG engine is studied. The breakup of liquid jet is the result of competing, unstable hydrodynamic forces acting on the liquid jet as it exits the nozzle. The nozzle geometry and up-stream injection conditions affect the characteristics of flow inside the nozzle, such as turbulence and cavitation bubbles. A set of calculations of the internal flow in a pintle type nozzle were performed using a two dimensional flow simulation under different nozzle geometry and upstream flow conditions. The calculation showed that the turbulent intensity and discharge coefficient are related to needle leading angle(.alpha.) and needle lift.edle lift.
 Keywords
Internal Flow in Nozzle;Turbulent Intensity;Needle Leading Angle;
 Language
Korean
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