Altitude ignition/lean decel study. Final report, August 1983-January 1985

Technical Report · Fri Nov 01 04:00:00 EST 1985

OSTI ID:5901724

The objective of this study was to develop analytical tasks consisting of new or improved models for predicting altitude ignition and lean-deceleration blowout. The approach taken was to describe the ignition and flame-stabilization limits in terms of characteristic time models. Characteristic times associated with chemical kinetics, fuel evaporation, and hot-flow residence are quantified for ignition and lean-deceleration blowout limits. These expressions were interrelated according to the criteria for successful ignition and flame stabilization. Statistical analysis was used to compare the various expressions and select the appropriate terms in formulating models that best fit the data for altitude ignition and lean deceleration blowout. The models linearly correlate variations in combustor pressure, inlet temperature, fuel-air ratio, fuel temperature, air velocity, pressure drop, combustor front-end geometry and injector size using existing data from USAF, Navy, NASA and PandW sponsored programs on operability performance of military and commercial gas turbine combustors. These models were based entirely on full scale engine tests.

• Research Organization: Pratt and Whitney Aircraft, West Palm Beach, FL (USA). Government Products Div.
• OSTI ID: 5901724
• Report Number(s): AD-A-163052/4/XAB; P/W/GPD-FR-18710
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330103* -- Internal Combustion Engines-- Turbine
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800 -- Combustion
Pyrolysis
& High-Temperature Chemistry
AIR FLOW
ALTITUDE
CHEMICAL REACTIONS
COMBUSTORS
ENGINES
EVAPORATION
FLAMES
FLUID FLOW
FUEL-AIR RATIO
GAS FLOW
GAS TURBINE ENGINES
HEAT ENGINES
IGNITION
INTERNAL COMBUSTION ENGINES
KINETICS
PHASE TRANSFORMATIONS
REACTION KINETICS
STABILIZATION
VELOCITY