Influence of Geometry and Flow Variation on Jet Mixing and NO Formation in a Model Staged Combustor Mixer with Eight Orifices PDF Download
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Languages : en
Pages : 178
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Author:
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Category :
Languages : en
Pages : 178
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Category :
Languages : en
Pages : 20
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Author: National Aeronautics and Space Adm Nasa
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ISBN: 9781731539885
Category :
Languages : en
Pages : 174
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A series of non-reacting parametric experiments was conducted to investigate the effect of geometric and flow variations on mixing of cold jets in an axis-symmetric, heated cross flow. The confined, cylindrical geometries tested represent the quick mix region of a Rich-Burn/Quick-Mix/Lean-Burn (RQL) combustor. The experiments show that orifice geometry and jet to mainstream momentum-flux ratio significantly impact the mixing characteristic of jets in a cylindrical cross stream. A computational code was used to extrapolate the results of the non-reacting experiments to reacting conditions in order to examine the nitric oxide (NO) formation potential of the configurations examined. The results show that the rate of NO formation is highest immediately downstream of the injection plane. For a given momentum-flux ratio, the orifice geometry that mixes effectively in both the immediate vicinity of the injection plane, and in the wall regions at downstream locations, has the potential to produce the lowest NO emissions. The results suggest that further study may not necessarily lead to a universal guideline for designing a low NO mixer. Instead, an assessment of each application may be required to determine the optimum combination of momentum-flux ratio and orifice geometry to minimize NO formation. Experiments at reacting conditions are needed to verify the present results. Samuelsen, G. S. and Sowa, W. A. and Hatch, M. S. Glenn Research Center JET MIXING FLOW; NITRIC OXIDE; GAS TURBINE ENGINES; FLOW GEOMETRY; CROSS FLOW; SUPERSONIC COMBUSTION; ORIFICES; FLOW DISTRIBUTION; MOMENTUM; COLD GAS; OZONE DEPLETION; FLOW VISUALIZATION; TEMPERATURE MEASUREMENT; ASPECT RATIO; MASS RATIOS; TRANSPORT AIRCRAFT; FLUID JETS; SLOTS; CIVIL AVIATION; COMBUSTION CHAMBERS; HOLE DISTRIBUTION (MECHANICS)...
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ISBN:
Category :
Languages : en
Pages : 138
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Category : Aeronautics
Languages : en
Pages : 648
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ISBN:
Category : Mechanical engineering
Languages : en
Pages : 550
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Author: D. S. Liscinsky
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Category : Fluid dynamics
Languages : en
Pages : 58
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Author: James D. Holdeman
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Category :
Languages : en
Pages : 20
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Presented at the International Gas Turbine and Aeroengine Congress & Exhibition, Birmingham, UK, Jun 10-13, 1996.
Author:
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ISBN:
Category : Science
Languages : en
Pages : 530
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Author: D. S. Liscinsky
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ISBN:
Category :
Languages : en
Pages : 24
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