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<p>This paper proposes an infrared radiation intensity optimization method that considers infrared suppression measures for the exhaust system of a turbofan engine with a Fully Shielded Guiding Strut Exhaust System (FSGS-ES) to address the synergistic optimization problem of infrared stealth and aerodynamic performance. By applying four infrared suppression techniques, including film cooling, low-emissivity materials, 2D nozzle, and ejection nozzle to FSGS-ES, and using the sparrow search algorithm (SSA) for performance optimization research, effective optimization of infrared radiation intensity was achieved. A component-level engine model supports the design of a 3D exhaust system, with numerical analyses of aerodynamic and infrared radiation characteristics under two typical conditions, including subsonic and supersonic cruise. The four techniques reduce infrared radiation by 5.91%, 5.16%, 6.45%, and 8.36%, respectively, enhancing stealth despite thrust losses and increased fuel consumption. Performance optimization demonstrates effective radiation control while maintaining operational feasibility.</p>

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Optimization Study on Infrared Characteristics of Turbofan Engines with Multiple Infrared Suppression Measures

  • 期刊论文

  • 发表日期：

    2026年3月4日

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  • Xuankai Liu,
  • Youyuan Zhu,
  • Yifan Wang,
  • Chunmei Wei,
  • Haoying Chen,
  • Haibo Zhang

摘要

This paper proposes an infrared radiation intensity optimization method that considers infrared suppression measures for the exhaust system of a turbofan engine with a Fully Shielded Guiding Strut Exhaust System (FSGS-ES) to address the synergistic optimization problem of infrared stealth and aerodynamic performance. By applying four infrared suppression techniques, including film cooling, low-emissivity materials, 2D nozzle, and ejection nozzle to FSGS-ES, and using the sparrow search algorithm (SSA) for performance optimization research, effective optimization of infrared radiation intensity was achieved. A component-level engine model supports the design of a 3D exhaust system, with numerical analyses of aerodynamic and infrared radiation characteristics under two typical conditions, including subsonic and supersonic cruise. The four techniques reduce infrared radiation by 5.91%, 5.16%, 6.45%, and 8.36%, respectively, enhancing stealth despite thrust losses and increased fuel consumption. Performance optimization demonstrates effective radiation control while maintaining operational feasibility.