• Infrared and Laser Engineering
  • Vol. 51, Issue 9, 20210965 (2022)
Wen Cheng1, Honghu Ji1, Xiaojuan Shi1, and Hao Wang2
Author Affiliations
  • 1College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • 2Yangzhou Collaborative Innovation Research Institute CO.LTD, Yangzhou 225000, China
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    DOI: 10.3788/IRLA20210965 Cite this Article
    Wen Cheng, Honghu Ji, Xiaojuan Shi, Hao Wang. Numerical study of fluid flow, heat transfer and infrared signature of 2D exhaust system model with full shielded guide vane combined with rear body[J]. Infrared and Laser Engineering, 2022, 51(9): 20210965 Copy Citation Text show less

    Abstract

    In order to reduce the contribution of the last-stage turbine of the infrared radiation in backward of the exhaust system, the full shielding guide vane(FSGV) is designed to achieve full shielding of the low-pressure turbine. Numerical simulation methods are used to study fluid flow heat transfer and infrared signature of three exhaust system (including baseline axisymmetric exhaust system,2D exhaust system and 2D exhaust system with FSGV) models combined with aircraft rear body, revealing the general rule of infrared radiation characteristics in the 3-5 μm band in backward of the three different combined models; the results show that compared with the baseline axisymmetric exhaust system model combined with aircraft rear body, whether it is a 2D exhaust system model combined with aircraft rear body or 2D exhaust system model with FASG model combined with aircraft rear body, the infrared radiation intensity has been reduced, and the drop rates are 22.1% and 46.9% respectively at a detection angle of 0°. If the cooling technology is adopted for the FSGV, as long as cooling efficiency reaches 0.282 and 0.482, compared to uncooled state of the exhaust system, the infrared radiation in backward of the exhaust system can be reduced by 20.4% and 35.45%.
    Wen Cheng, Honghu Ji, Xiaojuan Shi, Hao Wang. Numerical study of fluid flow, heat transfer and infrared signature of 2D exhaust system model with full shielded guide vane combined with rear body[J]. Infrared and Laser Engineering, 2022, 51(9): 20210965
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