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Coherent Structures Analysis of Methanol and Hydrogen Flames Using the Scale-Adaptive Simulation Model

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  • José A. Parra Rodríguez

    (Escuela Superior de Ingeniería Mecánica y Eléctrica, Instituto Politécnico Nacional, Av. Ticomán 600, Col. San José Ticomán, Mexico City 07340, Mexico)

  • Marco A. Abad Romero

    (Escuela Superior de Ingeniería Mecánica y Eléctrica, Instituto Politécnico Nacional, Av. Ticomán 600, Col. San José Ticomán, Mexico City 07340, Mexico)

  • Oliver M. Huerta Chávez

    (Escuela Superior de Ingeniería Mecánica y Eléctrica, Instituto Politécnico Nacional, Av. Ticomán 600, Col. San José Ticomán, Mexico City 07340, Mexico)

  • Luis R. Rangel-López

    (Engineering Department, Universidad Tecnológica de México-UNITEC-Ecatepec, Avenida Central 375, Ejidos Tulpetlac, Ecatepec de Morelos 55107, Mexico)

  • José C. Jiménez-Escalona

    (Escuela Superior de Ingeniería Mecánica y Eléctrica, Instituto Politécnico Nacional, Av. Ticomán 600, Col. San José Ticomán, Mexico City 07340, Mexico)

  • Jorge Diaz Salgado

    (Tecnologico Nacional de Mexico, Tecnológico de Estudios Superiores de Ecatepec (TESE), Av. Tecnológico S/N, Valle de Anahuac, Ecatepec de Morelos 55210, Mexico)

Abstract

Computational fluid dynamics techniques were applied to reproduce the characteristics of the liquid methanol burner described in a previous paper by Guevara et al. In this work, the unstable Reynolds-averaged Navier–Stokes (U-RANS) approach known as the Scale-Adaptive Simulation (SAS) model was employed, together with the steady nonadiabatic flamelets combustion model, to characterize and compare methanol and hydrogen flames. These flames were compared to determine whether this model can reproduce the coherent dynamic structures previously obtained using the LES model in other investigations. The LES turbulence model still entails a very high computational cost for many research centers. Conversely, the SAS model allows for local activation and amplification, promoting the transitions of momentum equations from the stationary to the transient mode and leading to a dramatic reduction in computational time. It was found that the global temperature contour of the hydrogen flame was higher than that of methanol. The air velocity profile peaks in the methanol flame were higher than those in hydrogen due to the coherent structures formed in the near field of atomization. Both flames presented coherent structures in the form of PVC; however, in the case of hydrogen, a ring-type vortex surrounding the flame was also developed. The axial, tangential, and radial velocity profiles of the coherent structures along the axial axis of the combustion chamber were analyzed at a criterion of Q = 0.003. The investigation revealed that the radial and tangential components had similar behaviors, while the axial velocity components differed. Finally, it was found that, using the SAS model, the coherent dynamic structures of the methanol flame were different from those obtained in previous works using the LES model.

Suggested Citation

  • José A. Parra Rodríguez & Marco A. Abad Romero & Oliver M. Huerta Chávez & Luis R. Rangel-López & José C. Jiménez-Escalona & Jorge Diaz Salgado, 2023. "Coherent Structures Analysis of Methanol and Hydrogen Flames Using the Scale-Adaptive Simulation Model," Energies, MDPI, vol. 16(20), pages 1-21, October.
  • Handle: RePEc:gam:jeners:v:16:y:2023:i:20:p:7074-:d:1258886
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    References listed on IDEAS

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    1. K. M. V. Ravi Teja & P. Issac Prasad & K. Vijaya Kumar Reddy & N. R. Banapurmath & Manzoore Elahi M. Soudagar & T. M. Yunus Khan & Irfan Anjum Badruddin, 2021. "Influence of Combustion Chamber Shapes and Nozzle Geometry on Performance, Emission, and Combustion Characteristics of CRDI Engine Powered with Biodiesel Blends," Sustainability, MDPI, vol. 13(17), pages 1-19, August.
    2. Sang Kyu Choi & Yeon Seok Choi & Yeon Woo Jeong & So Young Han & Quynh Van Nguyen, 2020. "Characteristics of Flame Stability and Gaseous Emission of Bio-Crude Oil from Coffee Ground in a Pilot-Scale Spray Burner," Energies, MDPI, vol. 13(11), pages 1-12, June.
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    Keywords

    CFD; turbulence; combustion;
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