Dense-Spray Structure and Phenomena.
Abstract
This report describes theoretical and experimental study of dense sprays. The work was divided into two phases: (1) an investigation of particle laden water jets; and (2) an investigation of large scale liquid jet in the atomization regime. The particle laden jet experiments involved nearly monodisperse glass particles in water injected into still water, to simulate phase density ratios typical of high pressure sprays. Preliminary findings suggest that the locally homogeneous flow approximation, where interphase transport rates are assumed to be infinitely fast, is more successful for this flow than was observed during earlier work with phase density ratios further from unity. This is encouraging for application of relatively simple locally homogeneous flow analysis to high-pressure combustion processes encountered in power and propulsion systems. Measurements of the atomization of the atomization of large scale liquid jets show the presence of an all liquid core which extends an appreciable distance from the injector (ca. 200 injector diameters) at atmospheric pressure conditions. The drop containing shear layer adjacent to this core exhibits some properties of a locally homogeneous flow, however, large drops were also formed at the liquid surface which probably depart from this behavior. Measurements of liquid volume fraction suggest relatively slow rates of turbulent mixing for the low pressure conditions of present experiments.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 15, 1986
- Accession Number
- ADA174683
Entities
People
- A. Sagar
- Gerard M. Faeth
- R. N. Parthasarathy
Organizations
- University of Michigan