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Abstract <p>The article presents a new technology for burning pure ammonia in air, based on the characteristics of bidirectional swirling flow. It describes the results of research on ammonia combustion in vortex devices with various geometries, and how the diameter of the vortex chamber, nozzle diameter and expansion angle affect the process. The article also discusses the limits of flame blow-off, which are determined by the Reynolds number. It shows that the rich blow-off limit is a simple linear function of the Reynolds number, but the lean blow-off has a more complex, nonlinear relationship with extreme values. Stable combustion modes are observed in the range of Reynolds numbers between 600 and 3500, and the combustion of pure ammonia occurs predominantly at air-to-fuel equivalence ratios greater than 1.</p>

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An Experimental Study of Ammonia Stable Combustion Modes in a Bidirectional Swirling Flow

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • R. I. Ivanov,
  • O. A. Evdokimov,
  • A. I Gur’yanov,
  • Sh. A. Pirialishvili

摘要

Abstract

The article presents a new technology for burning pure ammonia in air, based on the characteristics of bidirectional swirling flow. It describes the results of research on ammonia combustion in vortex devices with various geometries, and how the diameter of the vortex chamber, nozzle diameter and expansion angle affect the process. The article also discusses the limits of flame blow-off, which are determined by the Reynolds number. It shows that the rich blow-off limit is a simple linear function of the Reynolds number, but the lean blow-off has a more complex, nonlinear relationship with extreme values. Stable combustion modes are observed in the range of Reynolds numbers between 600 and 3500, and the combustion of pure ammonia occurs predominantly at air-to-fuel equivalence ratios greater than 1.