Transport and Interfacial Phenomena in Multi-Phase Combustion Systems
Abstract
Results of a 3-year research program, leading to 17 archival papers, are summarized here, covering the four basic areas: (A) Laser-Induced Incandescence (LII) for soot measurements at atmospheric pressure and high pressures; (B) Thermophoresis-based' particle diagnostic techniques; (C) Simulation methods for aerosol populations described by two (or more) "state variables"; and (D) Particle deposition from soot populations. As examples, we found that the small Knudsen number (e.g., high pressure) limit, Laser-Induced Incandescence (LII) can be used to infer aggregate size distributions, pdf(N). This requires improved estimates of the optical and heat transfer properties of fractal aggregates, also obtained under the present program (Filippov and Rosner, 1998, 1999, Filippov et al. 1999). Our Thermophoresis/soot deposition research has led to a novel and quite convenient method (called TPD') to track local soot volume fractions in laminar flames, most recently including flames deliberately doped' with possible soot pre-cursors. A versatile Monte-Carlo-based (MC) simulation of the population balance equation PBE has also been developed (Tandon and Rosner, 1999, Rosner and Yu, 1999) and successfully demonstrated for the important 2-state variable case in which each non-spherical particle in the population is characterized by its volume v and surface area, a. Even in this bi-variate case, "self-preserving" (constant shape pdf) asymptotic solutions have been found (Tandon and Rosner, 1999; in both the continuum and free-molecular limits (Rosner and Yu, 1999), and their physically important mixed moments' calculated.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 2000
- Accession Number
- ADA378476
Entities
People
- Daniel E. Rosner
Organizations
- Yale University