Nonlinear Distortion and Disintegration of Conical Liquid Sheets at High Pressure
Abstract
The research has identified, characterized, and quantified various important domains of behavior in the nonlinear distortion and disintegration of injected liquid fuel streams. Various liquid-stream configurations resulting from fuel injectors have been analyzed: conical, annular and planar streams with and without swirl; twin-fluid and single-fluid atomizers. Linear and nonlinear theories of distortion and disintegration have been developed and have predicted initial stream break-up characteristics. Distinct regimes of ligament break-up and cellular break-up have been determined. Modulations of both liquid streams and gas streams have been studied as means of active control. The characteristics of two-dimensional capillary wave phenomena have been determined. The effects of impacting gas jets have been compared with the Kelvin-Helmholtz effect of parallel jets. Pulsed gas jets have been shown to be more effective than gas jets as a break-up mechanism. The importance of the rate of forced stretching of the liquid stream compared to the rate of disturbance propagation in the stream (i.e., capillary wave velocity or characteristic viscous velocity) has been quantified; various regimes for the forced stretching have been identified and characterized.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 07, 2003
- Accession Number
- ADA412019
Entities
People
- Carsten Mehring
- William A. Sirignano
Organizations
- University of California, Irvine