Partial Premixing Effects on the Reacting Jet of a High-Pressure Axially Staged Combustor

Journal Article · Mon Feb 08 00:00:00 EST 2021 · Journal of Engineering for Gas Turbines and Power

DOI:https://doi.org/10.1115/1.4049700· OSTI ID:1844597

Genova, Tommy ^[1]; Otero, Michelle ^[1]; Reyes, Jonathan ^[1]; Martin, Scott ^[2]; Ahmed, Kareem ^[1]

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1. Univ. of Central Florida, Orlando, FL (United States)
2. Embry-Riddle Aeronautical Univ., Daytona Beach, FL (United States)

The effects of partial premixing on a reacting jet-in-crossflow is investigated in a five atmosphere axially staged combustor at stationary gas turbine relevant conditions. The facility consists of a dump style headend burner that provides a crossflow with a quasi-uniform velocity and temperature profile to the axial stage to isolate the effects of the jet-in-crossflow. The headend burner is run with methane and air at a lean equivalence ratio to match industry emission standards. For this work, the total air to the headend and axial stage is kept constant, and fuel is split between the headend and axial stage to represent different gas turbine loading conditions. For the cases analyzed, the fuel split to the axial stage went up to 25%. The axial stage consists of an optically accessible test section with a coaxial injector that provides variability to how long the methane and air can mix before entering the facility. Three different premixed levels are studied: fully premixed, nonpremixed, and partially premixed. The flow-field characteristics of the reacting jet-in-crossflow are analyzed using particle image velocimetry (PIV), and flame behavior is quantified by employing CH* chemiluminescence. NO measurements are made at the exit of the facility using a Horiba emissions analyzer. Furthermore, two different flames are observed: flames that burn in the leeward recirculation region and flames that burn at the core of the jet.

• Research Organization: Embry-Riddle Aeronautical Univ., Daytona Beach, FL (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: FE0031227
• OSTI ID: 1844597
• Journal Information: Journal of Engineering for Gas Turbines and Power, Vol. 143, Issue 3; ISSN 0742-4795
• Publisher: ASME
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
20 FOSSIL-FUELED POWER PLANTS
42 ENGINEERING
reacting jet in crossflow
flame stabilization
axial stage combustion
gas turbine combustion
high efficiency
partial premixing
high pressure