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Effect of Ambient Pressure on Internal Structure of a DI Gasoline Spray  

성기진 (부산대학교 대학원 기계공학과)
최동석 (한국과학기술원 기계공학과)
김덕줄 (부산대학교 기계공학부)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.10, no.6, 2002 , pp. 19-26 More about this Journal
Abstract
The objective of this study is to examine a DI(Direct Injection) gasoline spray development process under different ambient pressures using PIV(Particle Image Velocimetry). fuel spray experiments were performed within a constant volume chamber. The spray structure, velocity maps, velocity and vorticity contours were obtained to investigate its spray characteristics. It was found that higher ambient pressure has a significant effect on radial growth of the spray. The position which has a maximum velocity moved from the spray edge to the spray center as ambient pressure was increased. Higher ambient pressure moved a maximum vorticity position upward of the spray.
Keywords
Particle image velocimetry; Direct injection; Spray structure; Vortex; High-pressure swirl injector; Cross-correlation;
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