Numerical Simulation on the Infrared Radiation Characteristics of S-Shaped Nozzles

Abstract:

Infrared stealth is of great importance to increase the survival ability of the aircraft. The exhaust system is the main radiation source of the aircraft at the rare hemisphere. A program using reverse Monte-Carlo method was developed to calculate the infrared radiation intensity of afterburning turbofan engine under non-afterburning condition, and simulate axisymmetric nozzle and three S-shaped nozzles with different relative eccentric distances. The results demonstrate that: the infrared intensity of S-shaped nozzle is much lower than that of axisymmetric nozzle; S-shaped nozzle can effectively reduce the maximum of IR intensity in the rear hemispheric space; the S-shaped nozzle with the relative eccentric distance of 0.5 can reduce the intensity of infrared radiation in critical detection directions effectively.

• Periodical: Applied Mechanics and Materials (Volume 482)
• Pages: 282-286
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.482.282
• Online since: December 2013
• Authors: Xiang Gao*, Qing Zhen Yang, Hong Zhou, Jian Nan He
• Keywords: Axisymmetric Nozzle, Infrared Brightness Imaging, Infrared Radiation (IR) Characteristics, Reverse Monte-Carlo Method (RMCM), S-Shaped Nozzle

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