Effect of Recirculation Ratio on the Combustion Characteristics of an Asymmetric Swirling Flameless Combustor using Biogas

Authors

  • Najib Aminu Ismail High-Speed Reacting Flow (HiREF) Laboratory, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia
  • Mazlan Abdul Wahid High-Speed Reacting Flow (HiREF) Laboratory, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia
  • Aminuddin Sa'at High-Speed Reacting Flow (HiREF) Laboratory, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia
  • Abubakar Shitu Department of Mechanical Engineering, Faculty of Engineering, Ahmadu Bello University, Zaria, Nigeria
  • Mohammed Bashir Abdulrahman High-Speed Reacting Flow (HiREF) Laboratory, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia

DOI:

https://doi.org/10.37934/arfmts.108.1.5265

Keywords:

Asymmetric combustor, biogas, flameless combustion, swirl, recirculation ratio

Abstract

This study investigates the influence of recirculation ratio on the combustion characteristics of an asymmetric swirling flameless combustor. The recirculation ratio, defined as the ratio of the total recirculation mass flow rate to the primary air mass flow rate, plays a crucial role in determining the performance and emission characteristics of combustion systems. The asymmetric swirling flameless combustor offers potential advantages in terms of enhanced fuel flexibility, reduced pollutant emissions, and improved combustion stability. Through varying the recirculation ratio, the combustion performance and emission characteristics can be optimized to meet specific requirements. In this research, experimental investigations were conducted to analyse the effect of recirculation ratio on the combustion stability, temperature field and emission of the asymmetric swirling flameless combustion. From the results obtained, it was observed that recirculation ratio has significant effect on the performance of the combustor i.e., as the recirculation ratio increases due to decrease in the exhaust area, more uniform temperature and less emission was observed. At 30mm exhaust diameter and lean condition, average recirculation of 7.21 was obtained with 2ppm NOx emission and 118ppm CO emission along with uniform temperature in the combustion zone.

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Author Biographies

Najib Aminu Ismail, High-Speed Reacting Flow (HiREF) Laboratory, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia

njbslm01@gmail.com

Mazlan Abdul Wahid, High-Speed Reacting Flow (HiREF) Laboratory, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia

mazlan@utm.my

Aminuddin Sa'at, High-Speed Reacting Flow (HiREF) Laboratory, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia

amins@mail.fkm.utm.my

Abubakar Shitu, Department of Mechanical Engineering, Faculty of Engineering, Ahmadu Bello University, Zaria, Nigeria

abubakarshitu88@gmail.com

Mohammed Bashir Abdulrahman, High-Speed Reacting Flow (HiREF) Laboratory, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia

mobash2007@gmail.com

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Published

2023-09-17

How to Cite

Ismail, N. A., Abdul Wahid, M., Sa’at, A., Shitu, A., & Abdulrahman, M. B. . (2023). Effect of Recirculation Ratio on the Combustion Characteristics of an Asymmetric Swirling Flameless Combustor using Biogas. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 108(1), 52–65. https://doi.org/10.37934/arfmts.108.1.5265

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