Accession Number:

ADA175660

Title:

The Physics of Fuel Sprays. Volume 1. Experimental Measurements.

Descriptive Note:

Annual rept. Sep 85-Sep 86,

Corporate Author:

SOUTHWEST RESEARCH INST SAN ANTONIO TX FUELS AND LUBRICANTS RESEARCH DIV

Personal Author(s):

Report Date:

1986-12-05

Pagination or Media Count:

88.0

Abstract:

The objective of this program is to develop a better understanding of gas-turbine-type fuel sprays under realistic high temperature and high pressure evaporating conditions, and also at altitude relight conditions. This includes developing computer models to predict spray behavior and evaporation rates and sophisticated diagnostics to verify these models. Progress includes 1 Procedures for using the Aerometrics PhaseDoppler instrument and for processing the results have been developed to the point that the instrument can be used to provide benchmark quality data for spray model verification. Specifically, this instrument can be used to provide spatially-resolved drop size distributions, drop velocity distributions, and liquid volume-flux data. Problems in the liquid volume flux measurements close to the atomizer 25 mm are still being investigated. It was necessary to compare the performance of the Aerometrics PhaseDoppler particle analyzer with the Malvern drop sizing instrument. Because these instruments sample the spray in different ways, techniques were developed to correctly average the overall spray characteristics from measurements of different types of instruments. 2 A new, atmospheric-pressure spray facility was designed and constructed. This facility features a low-turbulence air flow system and computer-controlled nozzle positioning for accurate measurements throughout the spray. 3 The effects of reduced air pressure on atomization were examined to gain better insight into altitude relight problems.

Subject Categories:

  • Test Facilities, Equipment and Methods
  • Fluid Mechanics
  • Fuels

Distribution Statement:

APPROVED FOR PUBLIC RELEASE