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The paper investigates the internal and external aerodynamics and spray characteristics of the lean burn fuel injector through numerical investigation. The injector design is based on lean burn combustion concept and features a configuration of pilot and main mixer assembly of co and counter-rotating axial and radial swirler configurations. The standard k-epsilon turbulence model is used for capturing aerodynamics. Kelvin–Helmholtz and Rayleigh–Taylor model (KHRT) is applied to account for the secondary breakup of droplets. The study captures the formation of the vortex core, Central Toroidal Recirculation Zone (CTRZ), and internal spray structure. Spray characteristics such as Sauter Mean Diameter (SMD), mean diameter, droplet velocity, aerodynamics, and atomization of droplets are investigated in this paper.

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Numerical Investigation of Spray Characteristics for Main Atomizer of Lean Burn Gas Turbine Fuel Injector

  • 会议论文

  • 发表日期：

    2025年

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  • Shrey Srivastava,
  • Nandani Gupta,
  • Ayush Divyansh,
  • K. P. Shanmugadas

摘要

The paper investigates the internal and external aerodynamics and spray characteristics of the lean burn fuel injector through numerical investigation. The injector design is based on lean burn combustion concept and features a configuration of pilot and main mixer assembly of co and counter-rotating axial and radial swirler configurations. The standard k-epsilon turbulence model is used for capturing aerodynamics. Kelvin–Helmholtz and Rayleigh–Taylor model (KHRT) is applied to account for the secondary breakup of droplets. The study captures the formation of the vortex core, Central Toroidal Recirculation Zone (CTRZ), and internal spray structure. Spray characteristics such as Sauter Mean Diameter (SMD), mean diameter, droplet velocity, aerodynamics, and atomization of droplets are investigated in this paper.