Accession Number:

ADA383199

Title:

Measurements of Droplet Vaporization in Sprays

Descriptive Note:

Final technical rept. 15 Jun 1996-14 Jul 1999

Corporate Author:

CALIFORNIA UNIV DAVIS

Personal Author(s):

Report Date:

2000-09-12

Pagination or Media Count:

12.0

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. Ethanol, methanol and a pentaneethanol mixture were doped with Rhodamine 6G. Lasing spectra were examined in the steady state combustion regime. In the pentaneethanol 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 D2 law of droplet vaporization was evident. In addition, photographs of the flames yielded measurements of flame height and thickness. In the final year of support, a triggering and timing system was developed so that the DLS method could be applied a turbulent flow in which the trajectory and location of the tagged, fluorescent droplets was uncertain.

Subject Categories:

  • Physical Chemistry
  • Combustion and Ignition

Distribution Statement:

APPROVED FOR PUBLIC RELEASE