Determination of Structure, Temperature and Concentration in the Near-Injector Region of Impinging Jets Using Holographic Techniques
Abstract
The purpose of this research is to study the fluid dynamics of the dense region of impinging jet atomizers using a novel holographic technique which is able to penetrate this region and to record reliably the non-spherical liquid elements which populate it. During the second year of the research significant progress was made in the study of both low and high speed impingement. The effect of several parameters such as the impingement angle, the liquid jet velocity, and the orifice diameter on the atomization process was investigated. It was shown that in the dense spray region the liquid elements were indeed non-spherical. Smaller and faster droplets were generated with larger impingement angles, higher jet velocities, and smaller orifice diameters. The structure of the liquid elements near the jet impact point is indicative of the mechanisms of the disintegration process. The structure of the dense spray region clearly indicated that utilization of automated techniques that assume that the droplets are spherical for measurements in this region is not appropriate. The data from the holography experiments were used to show that the Universal Root - Normal Distribution is successful in describing the dense spray region. In the coming year the work will focus on the effect of fluid properties and environment temperature on the atomization process.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1997
- Accession Number
- ADA332874
Entities
People
- Dimos Poulikakos
Organizations
- University of Illinois at Chicago