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Technical Paper

Air Flow Surrounding Burning Transient Diesel Sprays

2002-10-21
2002-01-2668
Airflow characteristics surrounding burning transient diesel sprays inside a constant volume chamber under temperatures around 900 K were investigated using a 6-hole injector and a single-hole injector. Particle Image Velocimetry (PIV) was used to measure the gas velocities surrounding a spray plume as a function of space and time. The results were directly compared with the results from evaporating spray conditions near 900 K and non-evaporating conditions at 293 K. A conical control surface surrounding the spray plume was chosen as a representative side entrainment surface. The normal and tangential velocities of both for evaporating and burning sprays were higher than those of room temperature non-evaporating sprays. The velocities tangential to the control surface, toward the injector tip, for the single-hole injection sprays were lower than those of 6-hole injection sprays.
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