Air Blast Atomization as a Function of Pressure Loss for Large Air Flow Rates

Hussain, U. S. Abdul; Andrews, Gordon E.

doi:10.1115/90-gt-277

Volume 3: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations 1990

DOI: 10.1115/90-gt-277

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Air Blast Atomization as a Function of Pressure Loss for Large Air Flow Rates

U. S. Abdul Hussain

Gordon E. Andrews

Abstract: Combined air blast atomization and fuel and air mixing was studied in an interacting shear layer jet mixing flame stabilizer, termed Jet Mix, at gas turbine primary zone design conditions. Air blast atomization improves if large proportions of the combustion air flow are used and the maximum possible airflows were used in this study, as all the primary zone air flow was used for

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Cited by 2 publications

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The Applicability of Jet-Shear-Layer Mixing and Effervescent Atomization for Low-NOx Combustors

Colantonio

1998

Journal of Engineering for Gas Turbines and Power

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An investigation has been conducted to develop appropriate technologies for a low-NOx, liquid-fueled combustor. The combustor incorporates an effervescent atomizer used to inject fuel into a premixing duct. Only a fraction of the combustion air is used in the premixing process. This fuel-rich mixture is introduced into the remaining combustion air by a rapid jet-shear-layer mixing process involving radial fuel–air jets impinging on axial air jets in the primary combustion zone. Computational modeling was used as a tool to facilitate a parametric analysis appropriate to the design of an optimum low-NOx combustor. A number of combustor configurations were studied to assess the key combustor technologies and to validate the three-dimensional modeling code. The results from the experimental testing and computational analysis indicate a low-NOx potential for the jet-shear-layer combustor. Key features found to affect NOx emissions are the primary combustion zone fuel–air ratio, the number of axial and radial jets, the aspect ratio and radial location of the axial air jets, and the radial jet inlet hole diameter. Each of these key parameters exhibits a low-NOx point from which an optimized combustor was developed. Also demonstrated was the feasibility of utilizing an effervescent atomizer for combustor application. Further developments in the jet-shear-layer mixing scheme and effervescent atomizer design promise even lower NOx with high combustion efficiency.

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The Applicability of Jet-Shear-Layer Mixing and Effervescent Atomization for Low-NOx Combustors

Colantonio

1998

Journal of Engineering for Gas Turbines and Power

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High-Intensity Burners with Low No_x Emissions

Andrews

Alkabie

Aziz

et al. 1992

Proceedings of the Institution of Mechanical Engineers, Part A:

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Experimental combustion and NOx emissions results are summarized for a range of jet shear layer combustion systems that have rapid fuel and air mixing, short intense flames, a high turn-down ratio and low NOx characteristics. Two burner sizes of 76 and 140 mm are investigated for propane and natural gas. Three jet shear layer burners are compared with axial and radial swirlers. The combustion techniques were developed for application to low NOx combustion systems for industrial gas turbines, where NOx emissions as low as 10 ppm at 15 per cent oxygen have been demonstrated. It is shown that at one bar pressure, gas turbine combustors and high-intensity burners operate at similar air flow, blockage and pressure loss conditions.

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Air Blast Atomization as a Function of Pressure Loss for Large Air Flow Rates

Cited by 2 publications

References 11 publications

The Applicability of Jet-Shear-Layer Mixing and Effervescent Atomization for Low-NOx Combustors

The Applicability of Jet-Shear-Layer Mixing and Effervescent Atomization for Low-NOx Combustors

High-Intensity Burners with Low No_x Emissions

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Air Blast Atomization as a Function of Pressure Loss for Large Air Flow Rates

Cited by 2 publications

References 11 publications

The Applicability of Jet-Shear-Layer Mixing and Effervescent Atomization for Low-NOx Combustors

The Applicability of Jet-Shear-Layer Mixing and Effervescent Atomization for Low-NOx Combustors

High-Intensity Burners with Low Nox Emissions

Contact Info

Product

Resources

About

High-Intensity Burners with Low No_x Emissions