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LES of a Meso Combustion Chamber with a Detailed Chemistry Model: Comparison between the Flamelet and EDC Models

Author

Listed:
  • Angelo Minotti

    (Department of Mechanical & Aerospace Engineering, Sapienza University of Roma, via Eudossiana 18, 00184 Roma, Italy)

  • Enrico Sciubba

    (Department of Mechanical & Aerospace Engineering, Sapienza University of Roma, via Eudossiana 18, 00184 Roma, Italy)

Abstract

The goal of this paper is to contribute to the design of high-performance mesocombustors, a field currently under rapid development, in particular for propulsion, e.g., for UAVs, and micro/meso-electrical power generators. This study is focused on a cylindrical combustor of 29 cm 3 , fuelled by methane and air, which provides 2 kW of thermal power. The device was entirely designed and built at the Sapienza University of Rome and coupled with an ultra-micro turbine. Two 3D LES simulations with detailed chemistry are presented. They differ only for the combustion models, so that a model comparison can be carried out. The calculated maximum temperature inside the chamber, the gas exhaust temperature and the combustion efficiency are compared and discussed. The results, reported at two different physical times, show the effects of the different combustion models, which predict different temperature and species concentration maps, but similar values for the combustion efficiency. Thermal, chemical and kinematic maps show that the Eddy Dissipation Concept allows for a more accurate estimatation of the performance parameters for application to first-order design procedures.

Suggested Citation

  • Angelo Minotti & Enrico Sciubba, 2010. "LES of a Meso Combustion Chamber with a Detailed Chemistry Model: Comparison between the Flamelet and EDC Models," Energies, MDPI, vol. 3(12), pages 1-17, December.
    • Handle: RePEc:gam:jeners:v:3:y:2010:i:12:p:1943-1959:d:10530
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    Citations

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    Cited by:

    1. Yingzu Liu & Zhihua Wang & Liang Li & Kaidi Wan & Kefa Cen, 2018. "Reaction Mechanism Reduction for Ozone-Enhanced CH 4 /Air Combustion by a Combination of Directed Relation Graph with Error Propagation, Sensitivity Analysis and Quasi-Steady State Assumption," Energies, MDPI, vol. 11(6), pages 1-12, June.
    2. Maria Grazia De Giorgi & Aldebara Sciolti & Antonio Ficarella, 2014. "Application and Comparison of Different Combustion Models of High Pressure LO X /CH 4 Jet Flames," Energies, MDPI, vol. 7(1), pages 1-21, January.
    3. Seyed Ehsan Hosseini & Evan Owens & John Krohn & James Leylek, 2018. "Experimental Investigation into the Effects of Thermal Recuperation on the Combustion Characteristics of a Non-Premixed Meso-Scale Vortex Combustor," Energies, MDPI, vol. 11(12), pages 1-16, December.
    4. Markus Bösenhofer & Eva-Maria Wartha & Christian Jordan & Michael Harasek, 2018. "The Eddy Dissipation Concept—Analysis of Different Fine Structure Treatments for Classical Combustion," Energies, MDPI, vol. 11(7), pages 1-21, July.
    5. Ali Shamooni & Alberto Cuoci & Tiziano Faravelli & Amsini Sadiki, 2018. "Prediction of Combustion and Heat Release Rates in Non-Premixed Syngas Jet Flames Using Finite-Rate Scale Similarity Based Combustion Models," Energies, MDPI, vol. 11(9), pages 1-20, September.
    6. Yan Zhang & Zhengxing Zuo & Jinxiang Liu, 2015. "Numerical Analysis on Combustion Characteristic of Leaf Spring Rotary Engine," Energies, MDPI, vol. 8(8), pages 1-24, August.
    7. Angelo Minotti, 2016. "Energy Converter with Inside Two, Three, and Five Connected H 2 /Air Swirling Combustor Chambers: Solar and Combustion Mode Investigations," Energies, MDPI, vol. 9(6), pages 1-15, June.
    8. Yingzu Liu & Kaidi Wan & Liang Li & Zhihua Wang & Kefa Cen, 2018. "Verification and Validation of a Low-Mach-Number Large-Eddy Simulation Code against Manufactured Solutions and Experimental Results," Energies, MDPI, vol. 11(4), pages 1-14, April.
    9. Angelo Minotti & Paolo Teofilatto, 2015. "Swirling Combustor Energy Converter: H 2 /Air Simulations of Separated Chambers," Energies, MDPI, vol. 8(9), pages 1-16, September.

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