Physics of fuel sprays. Volume 1. Experimental measurements. Annual report, September 1985-September 1986

Technical Report · Fri Dec 05 04:00:00 EST 1986

OSTI ID:6746449

Dodge, L G

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 Phase/Doppler instrument and for processing the results were 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 Phase/Doppler 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.

• Research Organization: Southwest Research Inst., San Antonio, TX (USA). Fuels and Lubricants Research Div.
• OSTI ID: 6746449
• Report Number(s): AD-A-175660/0/XAB; SWRI-8858/1
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020500* -- Petroleum-- Products &amp; By-Products
33 ADVANCED PROPULSION SYSTEMS
330103 -- Internal Combustion Engines-- Turbine
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800 -- Combustion
Pyrolysis
&amp; High-Temperature Chemistry
AIR FLOW
ATOMIZATION
COMPUTERIZED SIMULATION
CONTROL
ENGINES
EVAPORATION
FLUID FLOW
FLUIDS
FUELS
GAS FLOW
GAS TURBINE ENGINES
HEAT ENGINES
HIGH PRESSURE
HIGH TEMPERATURE
IGNITION
INTERNAL COMBUSTION ENGINES
LIQUIDS
LOW PRESSURE
MATHEMATICAL MODELS
NOZZLES
PARTICLE SIZE
PHASE TRANSFORMATIONS
SIMULATION
SIZE
SPRAYS
TURBULENCE
VELOCITY
VOLUME