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An alternative approach to evaluate fuel/air mixing quality

Published online by Cambridge University Press:  14 May 2021

L.-Y. Jiang Open the ORCID record for L.-Y. Jiang [Opens in a new window]
L.-Y. Jiang*
Affiliation:
Aerospace Research Center National Research Council of Canada Ottawa Canada
*
lei-yong.jiang@nrc-cnrc.gc.ca
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Abstract

A practical method to evaluate quantitatively the uniformity of fuel/air mixing is essential for research and development of advanced low-emission combustion systems. Typically, this is characterised by measuring an unmixedness parameter or a uniformity index. An alternative approach, based on the fuel/air equivalence ratio distribution, is proposed and demonstrated in a simple methane/air venturi mixer. This approach has two main advantages: it is correlated with the fuel/air mixture combustion temperature, and the maximum temperature variation caused by fuel/air non-uniformity can be estimated. Because of these, it can be used as a criterion to check fuel/air mixing quality, or as a target for fuel/air mixer design with acceptable maximum temperature variation. For the situations where the fuel/air distribution non-uniqueness issue becomes important for fuel/air mixing check or mixer design, an additional statistical supplementary criterion should also be used.

Keywords

fuel/air mixingmixercombustioncriterionemission
Type
Research Article
Information
The Aeronautical Journal , Volume 125 , Issue 1291: The 25th ISABE Conference Special Issue – Part I , September 2021 , pp. 1469 - 1483
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Copyright
© The Author(s), 2021. Published by Cambridge University Press on behalf of Royal Aeronautical Society

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References

Jiang, L.Y. and Campbell, I. A Critical Evaluation of NOx Modeling in a Model Combustor, Journal of Engineering for Gas Turbines and Power, 2005, 127, (3), pp 483–491.Google Scholar
Lefebvre, A.H. Gas Turbine Combustion, Taylor and Francis Group, 2nd ed, 1999.Google Scholar
Miller, J.A. and Bowman, C.T. Mechanism and Modeling of Nitrogen Chemistry in Combustion, Progress in Energy and Combustion Science, 1989, 15, pp 287–338.CrossRefGoogle Scholar
Correa, S.M. A review of NOx formation under gas-turbine combustion conditions, Combustion Science and Technology, 1992, 87, pp 329–362.CrossRefGoogle Scholar
Saravanamuttoo, H.I.H., Rogers, G.F.C. and Cohen, H. Gas Turbine Theory, 5th ed, Pearson Education Limited, Edinburgh, 2001.Google Scholar
Jiang, L.Y., Han, Y., Zhang, Z., Wu, X., Clement, M. and Patnaik, P. Hot-Streak Effect on Internally Air-Cooled Nozzle Guide Vanes and Shrouds, Aeronautical Journal, UK Royal Aeronautical Society, 2019, 123, (1270), pp 2019–2033.Google Scholar
Chandekar, A.C. and Debnath, B.K. Computational investigation of air-biogas mixing device for different biogas substitutions and engine load variations, Renewable Energy, 2018, 127, pp 811–824.Google Scholar
Danardono, D., Kim, K.S., Lee, S.Y. and Lee, J.H. Optimization the Design of Venturi Gas Mixer for Syngas Engine using Three-Dimensional CFD Modeling, Journal of Mechanical Science and Technology, 2011, 25, (9), pp 2285–2296.Google Scholar
Danckwertz, P.V. The Definition and Measurement of Some Characteristics of Mixtures, Applied Scientific Research, 1952, 3, (Sec. A), pp 279–296.CrossRefGoogle Scholar
Fric, T.F. Effects of Fuel-Air Unmixedness on NOx Emissions, Journal of Propulsion and Power, 1993, 9, (5), pp 709–713.CrossRefGoogle Scholar
Kim, J.N., Kim, H.Y., Yoon, S.S., and Sa, S.D. Effect of Intake Valve Swirl on Fuel-Gas Mixing and Subsequent Combustion in a CAI Engine, International Journal of Automotive Technology, 2008, 9, (6), pp 649−657.CrossRefGoogle Scholar
Jadidi, M., Moghtadernejad, S. and Dolatabadi, A. A Comprehensive Review on Fluid Dynamics and Transport of Suspension/Liquid Droplets and Particles in High-Velocity Oxygen-Fuel, Thermal Spray Coatings, 2015, 5, (4), pp. 576–645, https://doi.org/10.3390/coatings5040576.Google Scholar
Fowles, G. and Boyes, W.H. Chapter 6, Measurement of Flow, in Instrumentation Reference book, 5th ed, Butterworth-Heinemann, 2010.Google Scholar
Matsunaga, N., Hori, M., Nagashima, A. Gaseous Diffusion Coefficients of Propane and Propylene into Air, Nitrogen and Oxygen, Netsu Bussei, 2007, 21, (3), pp 143–148.Google Scholar
eLearning@Cerfacs, Adiabatic Flame Temperature Calculator, 2019, http://elearning.cerfacs.fr/combustion/index.php Google Scholar
ANSYS Fluent Inc. Fluent 19 documentation, 10 Cavendish Court, Lebanon, NH 03766, USA, 2018.Google Scholar
Jiang, L.Y. RANS Modeling of Turbulence in Combustors, Chapter 7 in the book of Turbulence Modelling Approaches - Current State, Development Prospects, Applications, InTech, 2017, ISBN: 978-953-51-5311-5.CrossRefGoogle Scholar