Influences on the uniformity of sprays produced by gas turbine high shear nozzle/swirler assemblies
Abstract
In general, real fuel nozzles do not produce uniform spray patterns. To varying degrees, either because of design or manufacturing defects, asymmetric fuel flux profiles are delivered to the combustor. The resulting fuel-air ratio distributions may promote the production of soot, cause large temperature excursions in the combustor or compromise the operability limits of the combustor. Because modern fuel injectors rely on a delicate balance of fuel and air flows, they are susceptible to perturbations which can result in undesirable fuel spray patterns. An experimental investigation was conducted to determine the effects of a variety of design and manufacturing influences on the spray patterns of a model high shear nozzle/swirler assembly. High resolution patternation data were collected for three groups of perturbations to a baseline assembly. Data were compared on the basis of radial and circumferential fuel flux distributions.
- Publication:
-
AIAA, SAE, ASME, and ASEE, 26th Joint Propulsion Conference
- Pub Date:
- July 1990
- Bibcode:
- 1990jpof.confU....C
- Keywords:
-
- Combustion Chambers;
- Gas Turbine Engines;
- Nozzle Flow;
- Spray Characteristics;
- Fuel Flow;
- Injectors;
- Swirling;
- Fluid Mechanics and Heat Transfer