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<p>A contemporary axial flow swirler design for gas turbine engines is investigated in this study to further improve mixing behavior and swirl strength inside the combustion chamber. Stable combustion and improved fuel–air mixing are the stated objectives of the design, resulting in greater turbulence in the primary zone. Both flat and curved blade geometries were employed in the design and evaluation of six various swirler configurations. Modifications were made to the trailing edge on the suction side of multiple curved blade models with the goal to enhance aerodynamic performance and cope with fluctuating flow dynamics. For the purpose to ensure effective swirl development and flow control, the blade profiles were meticulously constructed with appropriate twist and inclination angles, based on established aerodynamic design principles. ANSYS FLUENT was used to perform numerical simulations to determine the performance of these designs. These models captured important characteristics such velocity fields, recirculation zones, and vortex forms, offering in-depth insights into the flow behavior within the combustor’s primary zone. The outcomes revealed that the different swirler designs had significantly distinct flow characteristics. More specifically, in contrast to the flat blade models, the curved blade versions created extended recirculation zones and more intense swirl.</p>

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Numerical evaluation of axial swirler designs for swirl-stabilized non-premixed combustion

  • 期刊论文

  • 发表日期：

    2026年4月20日

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  • Suthan R,
  • Kumar G N,
  • Kousik Kumaar R,
  • Sivakumar P

摘要

A contemporary axial flow swirler design for gas turbine engines is investigated in this study to further improve mixing behavior and swirl strength inside the combustion chamber. Stable combustion and improved fuel–air mixing are the stated objectives of the design, resulting in greater turbulence in the primary zone. Both flat and curved blade geometries were employed in the design and evaluation of six various swirler configurations. Modifications were made to the trailing edge on the suction side of multiple curved blade models with the goal to enhance aerodynamic performance and cope with fluctuating flow dynamics. For the purpose to ensure effective swirl development and flow control, the blade profiles were meticulously constructed with appropriate twist and inclination angles, based on established aerodynamic design principles. ANSYS FLUENT was used to perform numerical simulations to determine the performance of these designs. These models captured important characteristics such velocity fields, recirculation zones, and vortex forms, offering in-depth insights into the flow behavior within the combustor’s primary zone. The outcomes revealed that the different swirler designs had significantly distinct flow characteristics. More specifically, in contrast to the flat blade models, the curved blade versions created extended recirculation zones and more intense swirl.