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Spray Characteristics of High Pressure Gasoline Swirl Injector with Various Cross-flow Speeds  

Choi Jaejoon (Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology)
Lee Youngseok (Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology)
Choi Wook (Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology)
Bae Choongsik (Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.13, no.1, 2005 , pp. 1-8 More about this Journal
Abstract
The spray prepared for direct fuel injection into cylinder is of great importance in a DISI(Direct Injection Spark Ignition) engine. The interaction between air flow and fuel spray was investigated in a steady flow system embodied in a wind tunnel to simulate the variety of in-cylinder flow conditions in the DISI engine. The Mie-scattering images presented the macroscopic view of the liquid spray fields interacting with cross-flow Particle sizes of fuel droplets were measured with phase Doppler anemometer(PDA) system. A faster cross-flow field made SMD larger and $D_10$ smaller. The atomization and evaporation processes with a DISI injector were observed and consequently utilized to construct the database on the spray and fuel-air mixing mechanism as a function of the flow characteristics.
Keywords
DISI(Direct Injection Spark Ignition); Wind tunnel; Cross-flow; PDA; SMD(Sauter Mean Diameter);
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