Diagnostics for Research in Atomization and Turbulent Two-Phase Flows
Abstract
This investigation focussed on the development of instrumentation for the study of atomization and two-phase turbulent flows including sprays in reacting turbulent flow. Four methods were investigated: the phase Doppler method, ratiometric light scatter detection, Lagrangian frame particle dynamics analyzer, and scattered light heterodyne interferometry. For the phase Doppler technique, the physics of the dual beam light scattering phenomena, the effects of particle morphology on the light scattering, the effects of the nonuniform illumination of the particle, and the consequences of the random particle trajectories were investigated. Sampling statistics were also considered. The ratiometric light scatter detection method was used to size irregular shaped and inhomogeneous particles using the scattered light intensity in the near forward direction. The uncertainty due to the particle trajectory through the beams was removed using an optical deconvolution approach. A Lagrangian method for tracking individual particles was investigated. A rapidly swept light sheet produced a series of images of an individual particle on an array detector, from which the particles; position and velocity were obtained. This method is feasible given sufficient laser power and/or a large enough particle. Scattered light heterodyne interferometry posed significant limitations which indicated that it would not offer significant advantages.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 23, 1991
- Accession Number
- ADA247201
Entities
People
- William D. Bachalo