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Atomization and Sprays
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ISSN Imprimir: 1044-5110
ISSN En Línea: 1936-2684

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Atomization and Sprays

DOI: 10.1615/AtomizSpr.v8.i2.40
pages 199-215

A STUDY OF TWO-PHASE INJECTOR PERFORMANCE FOR DIRECT-INJECTION STRATIFIED-CHARGE ENGINES

Yong-Pyo Lee
Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Taejon, Korea
Sung-Soo Kim
Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Taejon, South Korea
Sangmin Choi
Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Yusong-gu, Taejon, Korea

SINOPSIS

The application of direct-injection stratified-charge (DISC) engines has been limited by the unsatisfactory atomization performance of existing fuel injectors, although it has great possibilities for improved fuel economy and low emissions through lean combustion. A two-phase injector for DISC engines was developed, which produced a good-quality spray. Injector performance was checked to investigate the spray structure and the optimal conditions in terms of design variables and operating parameters. This air-assisted injector exhibited stable behavior at speeds up to 6000 rpm and produced a finely atomized spray of 14.9 μm in Sauter mean diameter.


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