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Air Flow Characteristics Surrounding Evaporating Transient Diesel Sprays
Technical Paper
2002-01-0499
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Airflow characteristics surrounding evaporating transient diesel sprays inside a constant volume chamber under temperatures around 1100 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.
A conical control surface surrounding the spray plume was chosen as a representative side entrainment surface. The normal velocities crossing the control surface toward the spray plume for single-hole injection sprays were higher than those of 6-hole injection 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. An abrupt increase in tangential velocities near the chamber wall suggests that the recirculation of surrounding gas was accelerated by the spray wall impingement, both for non-evaporating and evaporating sprays. The normal and tangential velocities for evaporating spray conditions were larger than those for non-evaporating conditions. The total transferred energy from the hot ambient gas to the spray plume by entrainment for single-hole conditions was larger than for 6-hole conditions due to the higher entrainment velocities.
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Citation
Rhim, D. and Farrell, P., "Air Flow Characteristics Surrounding Evaporating Transient Diesel Sprays," SAE Technical Paper 2002-01-0499, 2002, https://doi.org/10.4271/2002-01-0499.Also In
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