Radiative heat transfer in a model gas turbine combustor

Paul, Manosh C.; Jones, W.P.

doi:10.2495/ht060401

Cited by 3 publications

References 13 publications

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Implementation of a Multi Zone Radiation Method in a Low NOx Gas Turbine Combustion Chamber Conceptual Simulator

Arima¹,

Sousa²,

Silva³

et al. 2011

Volume 5: Heat Transfer, Parts a and B

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A Multi-Zone Radiation method was employed in a conceptual simulator of gas turbine combustion chamber, which is configured as tubular, reverse flow and no film cooling, and equiped with a lean, premixed, low swirl and low Nox burner. Such simplified simulator is typically used for conceptual trade-off and optimization studies during the pre-design phase, when there is no experimental data available and when the number of runs can reach the order of hundreds or more. In the standard procedure, the convection heat fluxes of the annulus passage and combustion chamber liner are approximated by semi-empirical correlations; the thermal radiation flux is estimated by use of viewing factors between adjacent zones only; the heat conduction is estimated by a one-dimensional model. However, the present paper introduces a more accurate and theoretically rigorous estimation of the radiative heat transfer by adopting a Multi-Zone Method. The numerical code inputs are: the geometry; the flame burnout profile at the combustion region; and the mass fluxes through the dilution holes and the burner. The main outputs of the simulator are the average temperature and heat fluxes by conduction, radiation and convection of each zone. The present modeling strategy enabled the authors to assess the basic design characteristics of a conceptual model of combustion chamber, such as its length, its inlet air temperature, its combustion region equivalence ratio, its flame burnout profile, and its wall emissivities. Finally, it has advantages over the simplified radiation models because it takes into account the effects of temperature, burn-out and composition variations of all zones on each zone and vice-versa.

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Implementation of a Multi Zone Radiation Method in a Low NOx Gas Turbine Combustion Chamber Conceptual Simulator

Arima¹,

Sousa²,

Silva³

et al. 2011

Volume 5: Heat Transfer, Parts a and B

View full text Add to dashboard Cite

show abstract

Investigation on Radiative Heat Flux Distribution on the Wall Surface of the Flame Cylinder in the Reflux Combustion Chamber

Bi,

Liu,

Qian

et al. 2024

Preprint

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Optimization of Micro Gas Turbine Combustion Chamber by Changing the Swirler Numerically and Experimentally

Aghayari

Tabejamaat²

2022

Modares Mechanical Engineering

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In the design of the combustion chamber, various parameters usually are considered. These parameters include uniform temperature distribution at the outlet of the chamber, more flame stability, lower pollution, higher combustion efficiency, lower wall temperature, and lower pressure drop in the chamber. Regarding the complex condition of the flow in the combustion chamber due to the various effects of turbulence and mixing of flows as well as the behavior of turbulent flames, predicting the performance of flow in the combustion chambers is very complicated. In this paper, the swirler of Amirkabir University of Technology Combustion Chamber has been studied and optimized. It is done by using the numerical method and finally the selected swirler in the numerical method is tested in the experimental setup to investigate the optimization method. According to the optimization, a swirler with an angle of 60 degrees, 12 blades, and a thickness of 0.75 mm is selected as the final case. In the experimental results, the amount of CO pollution has been significantly reduced. The output temperature, the pattern factor and unburned hydrocarbon have been reduced in the final case. However, the temperature uniformity inside the chamber has increased.

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Radiative heat transfer in a model gas turbine combustor

Cited by 3 publications

References 13 publications

Implementation of a Multi Zone Radiation Method in a Low NOx Gas Turbine Combustion Chamber Conceptual Simulator

Implementation of a Multi Zone Radiation Method in a Low NOx Gas Turbine Combustion Chamber Conceptual Simulator

Investigation on Radiative Heat Flux Distribution on the Wall Surface of the Flame Cylinder in the Reflux Combustion Chamber

Optimization of Micro Gas Turbine Combustion Chamber by Changing the Swirler Numerically and Experimentally

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