Assessment of Exit Temperature Pattern Factors in an Annular Gas Turbine Combustor: An Overview

Muduli, S. K.; Mishra, Ranjan; Mishra, Purna Chandra

doi:10.1515/tjj-2019-0009

Cited by 12 publications

(2 citation statements)

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“…58 PF is an important parameter in turbine performance and plays a crucial role on the operating life of turbine vanes and blades. 59,60 Pattern factor ¼…”

Section: Reaction Modelmentioning

confidence: 99%

“…

italicPD goodbreak= \frac{{\dot{m}}_{fuel} \times {CV}_{fuel}}{V_{combustor} \times P_{combustor}}

PF as provided in Equation () corresponds to the temperature uniformity at the combustor outlet, where

T_{maximum}

and

T_{average}

are the maximum and average temperatures at the outlet of the combustor, respectively 58 . PF is an important parameter in turbine performance and plays a crucial role on the operating life of turbine vanes and blades 59,60

italicPattern factor goodbreak= \frac{T_{maximum} - T_{average}}{T_{average} - T_{inlet}}

TP of the exhaust gasses refers to the power generated by the combustor due to combustion and is expressed in Equations () and (), where

{\dot{m}}_{italicair italicor oxidizer}

and

m_{fuel}

correspond to oxidizer and fuel mass flow rates, respectively.…”

Section: Numerical Modelingmentioning

confidence: 99%

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Analysis of methane, propane, and syngas oxy‐flames in a fuel‐flex gas turbine combustor for carbon capture

Haque

Nemitallah

Abdelhafez

et al. 2022

Intl J of Energy Research

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Premixed oxy-combustion flames of methane, syngas (CH 4 :CO:H 2 with the molar ratio of 2:1:1), and propane in CO 2 -diluted environment (for carbon capture) are examined in a swirl-stabilized combustor using large eddy simulations (LES) in three-dimensional (3-D) domain. The flame and emission characteristics are examined for the different fuels over a range of equivalence ratios (Φ: 0.34, 0.39, and 0.42), at 60% oxygen fraction (OF), and 2.5 m/s bulk inlet velocity under atmospheric conditions. The results indicate increments in several characteristic parameters that are of special importance for gas turbine combustion applications, including adiabatic flame temperature (T ad ), laminar flame speed (LFS), power density (PD), product formation rate (PFR), Damköhler number (Da), and CO emission, with the increase of Φ whatever the type of fuel. Alternatively, flame thickness (δ) decreases with the increase in Φ for the three fuels. Characteristic "V" shape with almost identical outer recirculation zone (ORZ) is also observed for the three fuels. Among the studied fuels, oxy-methane flames demonstrate highest flame thicknesses, least uniform temperature distribution (highest pattern factor) at combustor outlet, and lowest CO emission level. Oxy-syngas flames show more uniform temperature distribution (lowest pattern factor) at combustor outlet and highest CO emission as compared with the oxy-methane and oxy-propane flames. The oxy-propane flames have higher values of T ad , LFS, PD, PFR, Da, and thermal power (TP) along with lowest flame thickness compared with methane and syngas counterparts. Highlights• Increasing equivalence ratio improves the flame characteristics but increases CO emission.• Fuel type has insignificant effects on shape/size of the outer recirculation zone (ORZ).• Oxy-methane flames showed highest flame thicknesses and pattern factor and lowest CO.

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“…58 PF is an important parameter in turbine performance and plays a crucial role on the operating life of turbine vanes and blades. 59,60 Pattern factor ¼…”

Section: Reaction Modelmentioning

confidence: 99%

“…