Numerical study on infrared radiation intensity and suppression methods of nozzle considering multi-component effects

Hou, Shengwen; Wang, Qiang; Hu, Haiyang; Liu, Sishuo; Niu, Jiabao

doi:10.1016/j.applthermaleng.2024.124647

Applied Thermal Engineering

2025

DOI: 10.1016/j.applthermaleng.2024.124647

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Numerical study on infrared radiation intensity and suppression methods of nozzle considering multi-component effects

Shengwen Hou,

Qiang Wang,

Haiyang Hu

et al.

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Cited by 2 publications

References 29 publications

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Numerical analysis of infrared radiation intensity of two-dimensional convergent divergent exhaust system considering the effects of multiple components

Hou,

Wang,

et al. 2025

International Journal of Thermal Sciences

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Numerical analysis of infrared radiation intensity of two-dimensional convergent divergent exhaust system considering the effects of multiple components

Hou,

Wang,

et al. 2025

International Journal of Thermal Sciences

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Study of Cooling Characteristics of Axisymmetric Tail Nozzle

Zeng,

Xi,

et al. 2024

Energies

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In order to reduce the infrared radiation intensity of supersonic tail nozzles and in response to the increasingly severe battlefield infrared environment, simulations were conducted on axisymmetric expanding tail nozzles to study the effects of air, liquid nitrogen, and dry ice cold flows at different flow rates on the nozzle wall temperature. The results show that when the dry ice flow rate is increased by 1 kg/s, the maximum temperature of the wall surface in the expansion section decreases by about 40 K. At a cold flow rate of 5% in the 0° detection direction, the intensity of infrared radiation was reduced by 20.8% for the liquid nitrogen cold flow and 26.3% for the dry ice cold flow, compared to the cold flow of injected air. The IR suppression of the tail nozzle was significant in the range from α = 0 to 50°. Compared to cooling air, the maximum IR radiation intensity was reduced by 26.5% for dry ice and 20.4% for liquid nitrogen. When the flow rate of the injected cold stream was increased by 4%, the intensity of the infrared radiation from the nozzle was reduced by 52.6%, 55.8%, and 66.2% for the injected air, liquid nitrogen, and dry ice cold streams, respectively.

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Numerical study on infrared radiation intensity and suppression methods of nozzle considering multi-component effects

Cited by 2 publications

References 29 publications

Numerical analysis of infrared radiation intensity of two-dimensional convergent divergent exhaust system considering the effects of multiple components

Numerical analysis of infrared radiation intensity of two-dimensional convergent divergent exhaust system considering the effects of multiple components

Study of Cooling Characteristics of Axisymmetric Tail Nozzle

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