Evaluation of phase doppler particle analyzer for measuring dense sprays from a gas turbine fuel injector

Conference · Wed Jan 01 04:00:00 EST 1986

OSTI ID:6102852

Kraemer, G; Bachalo, W D

An experimental investigation was conducted to evaluate the suitability of the Phase Doppler Particle Analyzer (PDPA) for measuring sprays produced by fuel injectors. The instrument was subjected to several tests at simulated spray and combustion chamber operating conditions. Light beam attenuations produced by contaminated windows and optical-path length through the spray were insignificant sources of error. Off-axis forward and off-axis back scatter measurements were made and demonstrated good agreement. As expected, increased laser power was required for the back scatter measurements. Line averaged measurements of the Sauter Mean Diameter (SMD) were determined and compared to Fraunhofer diffraction measurements. The results were in agreement to within 5 percent. Although the instrument has a relatively large dynamic range of 35, size distributions at different ranges needed to be combined to cover the very large size ranges produced by the injector operating at off design conditions. Simultaneous drop size, velocity, and number density measurements produced by the instrument provide the information needed for combustor development and modeling of the air-fuel mixing processes.

• OSTI ID: 6102852
• Report Number(s): CONF-8606184-
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200104* -- Fossil-Fueled Power Plants-- Components
BACKSCATTERING
BEAM OPTICS
COHERENT SCATTERING
COMBUSTION CHAMBERS
COMBUSTORS
DENSITY
DIFFRACTION
DOPPLER EFFECT
DROPLETS
ELECTROMAGNETIC RADIATION
FLOW RATE
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
FUEL-AIR RATIO
GAS TURBINES
MACHINERY
MEASURING METHODS
MONITORING
OPERATION
PARTICLES
PHYSICAL PROPERTIES
PLANNING
RADIATIONS
SCATTERING
SIMULATION
SPRAYS
TURBINES
TURBOMACHINERY
VISIBLE RADIATION