Turbulent velocity and temperature measurements from a gas-fueled technology combustor with a practical fuel injector

Conference · Sun Jan 01 04:00:00 EST 1995 · Combustion and Flame; (United States)

OSTI ID:6555794

Hedman, P O; Warren, D L ^[1]

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1. Brigham Young Univ, Provo, UT (United States)

Combustion characteristics of a propane-fueled, practical injector operating in a burner that closely reproduces the flow patterns of a gas turbine combustor have been investigated. The practical injector converges co-swirling airsheets on either side of a coannular fuel sheet into the central air passage. Instantaneous planar-laser-induced fluorescence (PLIF) images of OH radical, laser doppler anemometer (LDA) measurements of mean and rms velocity, and coherent anti-Stokes Raman spectroscopic (CARS) measurements of mean and rms temperatures in the same burner at the same operating conditions have provided improved understanding of the complicated processes in a gas turbine combustor. The PLIF images of the OH radical have confirmed the vortex characteristics of the swirling flames and the highly variable nature of the flame shape as [phi] must lie between the lean and rich flammability limits for a flame to be locally present. Three recirculation zones were identified from LDA measurements. The highest axial velocity region is about 75 mm downstream for the fuel lean case, but is near the injector for the fuel rich case. The highest tangential velocities are located near the injector for both lean and rich cases. The effects of the injector on velocity were dissipated by one combustor diameter downstream. Large rms velocities occurred in areas where significant velocity gradients exist. The high temperatures changed location as the fuel equivalence ratio was varied from fuel lean (over the injector) to fuel rich (near the outer recirculation zone).

• OSTI ID: 6555794
• Report Number(s): CONF-940711--
• Conference Information: Journal Name: Combustion and Flame; (United States) Journal Volume: 100:1-2
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
034000* -- Natural Gas-- Combustion
33 ADVANCED PROPULSION SYSTEMS
330103 -- Internal Combustion Engines-- Turbine
AIRCRAFT
ALKANES
BURNERS
CHEMICAL REACTIONS
COMBUSTION
EQUIPMENT
FLAMES
FLUID FLOW
FLUID MECHANICS
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
FUEL-AIR RATIO
GAS BURNERS
GAS FLOW
GAS TURBINES
HYDROCARBONS
HYDROXYL RADICALS
MACHINERY
MECHANICS
MORPHOLOGY
ORGANIC COMPOUNDS
OXIDATION
PERFORMANCE
PROPANE
RADICALS
TEMPERATURE MEASUREMENT
THERMOCHEMICAL PROCESSES
TURBINES
TURBOMACHINERY