Back to Search
Start Over
An investigation on the impact of small-scale models in gasoline direct injection sprays (ECN Spray G)
- Source :
- International Journal of Engine Research
- Publication Year :
- 2019
- Publisher :
- SAGE Publications, 2019.
-
Abstract
- The work presents a numerical investigation of gasoline direct injection and the resulting early development of spray plumes from an eight-hole injector (Engine Combustion Network Spray G). The objective is to evaluate the impact on the droplet size distribution (DSD) statistics from the assumed model physics, particularly for the small scales. Two modelling approaches are compared: Eulerian–Lagrangian spray atomisation with adaptive mesh refinement and a stochastic fields transported probability density function method. The two models simulate the small scales and sub-grid droplet physics with different approaches, but based on the same concept of transport of liquid surface density. Both approaches predict similar liquid distributions in the near-field comparable to experimental measurements. The spray break-up patterns are very similar and both models reproduce quasi-log-normal droplet distributions, with same overall Sauter mean diameters. The Eulerian–Lagrangian spray atomisation with probability density function approach shows different break-up behaviour between droplets originating from the dilute region and those originating from the dense core region. The transition from Eulerian to Lagrangian can be observed in the Eulerian–Lagrangian spray atomisation with adaptive mesh refinement predicted distribution with an abrupt change in the DSD. Both methods are able to produce similar DSD below filter width/grid size resolution.
- Subjects :
- business.industry
Mechanical Engineering
Aerospace Engineering
Ocean Engineering
02 engineering and technology
Injector
Combustion
01 natural sciences
010305 fluids & plasmas
law.invention
Physics::Fluid Dynamics
020401 chemical engineering
law
0103 physical sciences
Automotive Engineering
Environmental science
0204 chemical engineering
Process engineering
business
Gasoline direct injection
Scale model
Subjects
Details
- ISSN :
- 20413149 and 14680874
- Volume :
- 21
- Database :
- OpenAIRE
- Journal :
- International Journal of Engine Research
- Accession number :
- edsair.doi.dedup.....0ad3edc111744509d0a6fb219373a236
- Full Text :
- https://doi.org/10.1177/1468087419889449