Air Flow Characteristics Surrounding Evaporating Transient Diesel Sprays
2002-01-0499
03/04/2002
- Event
- Content
- 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.
- Pages
- 27
- 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.