Mechanism of Intermittent Atomization
Abstract
A theory is developed for the purpose of enhancing the efficiency of internal combustion engines, and to reduce the air pollution caused by inefficient combustion. The theoretical results show that the droplet formation from the leading edge of the liquid fuel jet is caused by th Taylor-Lamb instability during the decerelation phase of the intermittent spray. The mechanism of droplet formation from the rest of the liquid-gas interface is caused by the interfacial stress fluctuation. The decerelation of the liquid jet tends to reduce the droplet diameter at the same pressure. However, finer sprays can be produced with a more sudden reduction in the nozzle inlet pressure after its peak during the injection period. An increase in the compressibility of the liquid jet is shown the promote the generation of smaller droplets, although at a slower rate. The compressibility of the ambient gas, as well as the surface tension, tends to promote absolute instability. The precise physical meaning remains unclear. The absolute instability can be reduced to convective instability by reducing the surface tension and/or increasing the compressibility of the jet fluid. The convective instability is responsible for the formation of sprays.... Intermittent fuel sprays, Atomization
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1993
- Accession Number
- ADA266625
Entities
People
- S. P. Lin
Organizations
- Clarkson University