Improved Modeling of Drop Vaporization and Combustion in Diesel Sprays
Abstract
The objective of the research work is to identify limitations of simplified droplet vaporization and combustion models in Diesel sprays and to improve them. Detailed numerical studies of isolated drops, isolated droplet vaporization within the framework of multidimensional model computations, and multidimensional spray computations have been carried out. During the course of the year, the methods adopted for property estimates, variable density effects, multicomponent effects, and ambient gas effects on droplet vaporization were studied. The effect of the numerical resolution on single drop predictions were also studied. The overall conclusion of the work during the course of the year was that under warm Diesel operating conditions, the vaporization rate in diesel sprays is mixing-controlled and, hence, the detailed effects of the vaporization model are not important. Under cold-start conditions it is more important to account for detailed droplet vaporization phenomena.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 25, 2001
- Accession Number
- ADA387040
Entities
People
- John Abraham
Organizations
- Purdue Research Foundation