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Infrared and Laser Engineering, Volume. 53, Issue 1, 20230436(2024)

Effects of infrared-suppressor-integrated exhaust outflow on its aerodynamic and infrared radiation characteristics

Xingyao Wen... Jingzhou Zhang and Yong Shan* |Show fewer author(s)
Author Affiliations
  • Key Laboratory of Thermal Management and Energy Utilization of Aircraft, Ministry of Industry and Information Technology, College of Energy and Power, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (22)
    Equations (2)
    References (19)
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    Figures & Tables(22)
    (a) Infrared-suppressor-integrated composition; (b) Internal cross-sectional flow of suppressor

    Fig. 1. (a) Infrared-suppressor-integrated composition; (b) Internal cross-sectional flow of suppressor

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    (a) Local schematic of exhaust system structure; (b) Exhaust lobe outlet section; (c) Ejector lobe parameters

    Fig. 2. (a) Local schematic of exhaust system structure; (b) Exhaust lobe outlet section; (c) Ejector lobe parameters

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    (a) Exhaust lobe angle diagram; (b) Local schematic of mixing duct and lobes with deflection angle

    Fig. 3. (a) Exhaust lobe angle diagram; (b) Local schematic of mixing duct and lobes with deflection angle

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    Schematic of the computational domain in ground experiment

    Fig. 4. Schematic of the computational domain in ground experiment

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    Schematic of the computational domain with forward flow

    Fig. 5. Schematic of the computational domain with forward flow

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    Distribution of detection positions

    Fig. 6. Distribution of detection positions

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    Schematic diagram of experimental system

    Fig. 7. Schematic diagram of experimental system

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    Experimental measurement and numerical simulation of axial temperature distribution on external wall of mixing duct

    Fig. 8. Experimental measurement and numerical simulation of axial temperature distribution on external wall of mixing duct

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    (a) Exhaust temperature (downwash flow 0 m/s); (b) Exhaust temperature (downwash flow 20 m/s)

    Fig. 9. (a) Exhaust temperature (downwash flow 0 m/s); (b) Exhaust temperature (downwash flow 20 m/s)

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    Ejection coefficient under different forward flow velocities of modes

    Fig. 10. Ejection coefficient under different forward flow velocities of modes

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    Flow and temperature distribution of exhaust in mixing duct under different forward flow velocities: (a) Forward flow 15 m/s model A; (b) Forward flow 55 m/s model A; (c) Forward flow 15 m/s model C; (d) Forward flow 55 m/s model C; (e) Forward flow 15 m/s model D; (f) Forward flow 55 m/s model D

    Fig. 11. Flow and temperature distribution of exhaust in mixing duct under different forward flow velocities: (a) Forward flow 15 m/s model A; (b) Forward flow 55 m/s model A; (c) Forward flow 15 m/s model C; (d) Forward flow 55 m/s model C; (e) Forward flow 15 m/s model D; (f) Forward flow 55 m/s model D

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    Total pressure recovery coefficient under different forward flow velocities of modes

    Fig. 12. Total pressure recovery coefficient under different forward flow velocities of modes

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    Position of the cross section in mixing duct

    Fig. 13. Position of the cross section in mixing duct

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    Static pressure and streamlines distribution in the cross section of mixing duct under different forward flow velocities: (a) Forward flow 15 m/s model A; (b) Forward flow 55 m/s model A; (c) Forward flow 15 m/s model C; (d) Forward flow 55 m/s model C; (e) Forward flow 15 m/s model D; (f) Forward flow 55 m/s model D

    Fig. 14. Static pressure and streamlines distribution in the cross section of mixing duct under different forward flow velocities: (a) Forward flow 15 m/s model A; (b) Forward flow 55 m/s model A; (c) Forward flow 15 m/s model C; (d) Forward flow 55 m/s model C; (e) Forward flow 15 m/s model D; (f) Forward flow 55 m/s model D

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    Mass flow rate of downwash flow entering models under different forward flow velocities

    Fig. 15. Mass flow rate of downwash flow entering models under different forward flow velocities

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    Temperature distribution of external skin under different forward flow velocities: (a) Forward flow 15 m/s model A; (b) Forward flow 55 m/s model A; (c) Forward flow 15 m/s model C; (d) Forward flow 55 m/s model C; (e) Forward flow 15 m/s model D; (f) Forward flow 55 m/s model D

    Fig. 16. Temperature distribution of external skin under different forward flow velocities: (a) Forward flow 15 m/s model A; (b) Forward flow 55 m/s model A; (c) Forward flow 15 m/s model C; (d) Forward flow 55 m/s model C; (e) Forward flow 15 m/s model D; (f) Forward flow 55 m/s model D

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    Visible wall temperature distribution in exhaust section under different forward flow velocities at the bottom of models: (a) Forward flow 15 m/s model A; (b) Forward flow 55 m/s model A; (c) Forward flow 15 m/s model C; (d) Forward flow 55 m/s model C; (e) Forward flow 15 m/s model D; (f) Forward flow 55 m/s model D

    Fig. 17. Visible wall temperature distribution in exhaust section under different forward flow velocities at the bottom of models: (a) Forward flow 15 m/s model A; (b) Forward flow 55 m/s model A; (c) Forward flow 15 m/s model C; (d) Forward flow 55 m/s model C; (e) Forward flow 15 m/s model D; (f) Forward flow 55 m/s model D

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    Infrared radiation intensity distribution on cross section under different forward flow velocities: (a) Forward flow 15 m/s 3-5 μm band; (b) Forward flow 15 m/s 8-14 μm band; (c) Forward flow 55 m/s 3-5 μm band; (d) Forward flow 55 m/s 8-14 μm band

    Fig. 18. Infrared radiation intensity distribution on cross section under different forward flow velocities: (a) Forward flow 15 m/s 3-5 μm band; (b) Forward flow 15 m/s 8-14 μm band; (c) Forward flow 55 m/s 3-5 μm band; (d) Forward flow 55 m/s 8-14 μm band

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    Infrared radiation intensity distribution on longitudinal section under different forward flow velocities: (a) Forward flow 15 m/s 3-5 μm band; (b) Forward flow 15 m/s 8-14 μm band; (c) Forward flow 55 m/s 3-5 μm band; (d) Forward flow 55 m/s 8-14 μm band

    Fig. 19. Infrared radiation intensity distribution on longitudinal section under different forward flow velocities: (a) Forward flow 15 m/s 3-5 μm band; (b) Forward flow 15 m/s 8-14 μm band; (c) Forward flow 55 m/s 3-5 μm band; (d) Forward flow 55 m/s 8-14 μm band

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    Infrared radiation intensity distribution from different sources on cross section under forward flow velocity is 55 m/s: (a) 3-5 μm band exhaust; (b) 3-5 μm band external skin; (c) 3-5 μm band inner wall; (d) 8-14 μm band exhaust; (e) 8-14 μm band external skin; (f) 8-14 μm band inner wall

    Fig. 20. Infrared radiation intensity distribution from different sources on cross section under forward flow velocity is 55 m/s: (a) 3-5 μm band exhaust; (b) 3-5 μm band external skin; (c) 3-5 μm band inner wall; (d) 8-14 μm band exhaust; (e) 8-14 μm band external skin; (f) 8-14 μm band inner wall

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    • Table 1. Ejection coefficient of lobed nozzle in ground experiment and with simulated forward flow under different grid numbers

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      Table 1. Ejection coefficient of lobed nozzle in ground experiment and with simulated forward flow under different grid numbers

      Grid number (million)In Ground experimentWith simulated forward flow
      80.0460.175
      100.0480.175
      120.0480.177
      140.0490.178
      160.0490.179
      180.0490.179

    • Table 2. Experimental measurement and numerical simulation of infrared radiation intensity in cross-sectional direction at 0° angle

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      Table 2. Experimental measurement and numerical simulation of infrared radiation intensity in cross-sectional direction at 0° angle

      Status3-5 μm/W·sr−18-14 μm/W·sr−1
      Experiment (downwash 0 m/s)5.233.6
      Experiment(downwash 20 m/s)4.030.9
      Simulation(downwash 0 m/s)5.032.5
      Simulation(downwash 20 m/s)3.729.3
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    Xingyao Wen, Jingzhou Zhang, Yong Shan. Effects of infrared-suppressor-integrated exhaust outflow on its aerodynamic and infrared radiation characteristics[J]. Infrared and Laser Engineering, 2024, 53(1): 20230436

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    Paper Information

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    Received: Jul. 12, 2023

    Accepted: --

    Published Online: Mar. 19, 2024

    The Author Email: Shan Yong (nuaasy@nuaa.edu.cn)

    DOI:10.3788/IRLA20230436

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology