Measurements of Droplet Vaporization in Sprays

Abstract

AASERT funding was used to support graduate student research in the area of spray droplet vaporization. Droplet lasing spectroscopy (DLS) was applied to the measurement of droplet size and vaporization rates in both reacting and non-reacting rectilinear droplet streams. A Berglund-Liu droplet generator was used to generate a stream of droplets, approximately 63 microns in diameter and 6.5 droplet diameters apart. Ethanol, methanol and a pentane/ethanol mixture were doped with Rhodamine 6G. Lasing spectra were examined in the steady state combustion regime. In the pentane/ethanol case, measurements were carried out in a sooting region of the flame. In some cases, vaporization rates were high enough to measure the rate from consecutive droplets, yielding a quasi-instantaneous measurement. In all cases, the D squared law of droplet vaporization was evident. In addition, photographs of the flames yielded measurements of flame height and thickness.

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Document Details

Document Type
Technical Report
Publication Date
Aug 19, 1998
Accession Number
ADA353093

Entities

People

  • Ian M. Kennedy

Organizations

  • University of California

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Alcohols
  • Burning Rate
  • Charge Coupled Devices
  • Combustion
  • Diameters
  • Generators
  • Images
  • Laser Applications
  • Laser Dyes
  • Lasers
  • Measurement
  • Methanols
  • Spectra
  • Spectroscopy
  • Steady State
  • Thickness
  • Vaporization

Readers

  • Aerosol Science/Aerosol Physics
  • Chemistry (specifically Chemical Fluorescence)
  • Combustion science or combustion engineering.