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  • Received: Jun. 11, 2020

    Accepted: Jul. 15, 2020

    Posted: Nov. 1, 2020

    Published Online: Nov. 2, 2020

    The Author Email: Yu Kun (yukun1107@qq.com)

    DOI: 10.3788/AOS202040.2129001

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    Kun Yu, Mingyu Cong, Wencong Dai. Simulation Analysis of Infrared Radiation Suppression Effect of Solid Particles on Aircraft Exhaust Plume[J]. Acta Optica Sinica, 2020, 40(21): 2129001

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Acta Optica Sinica, Vol. 40, Issue 21, 2129001 (2020)

Simulation Analysis of Infrared Radiation Suppression Effect of Solid Particles on Aircraft Exhaust Plume

Yu Kun*, Cong Mingyu, and Dai Wencong

Author Affiliations

  • Research Center for Space Optical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150006, China

Abstract

In this paper, the infrared radiation characteristics of the gas-solid two-phase exhaust plume containing solid particles are simulated and modeled. The ray tracing method is used to calculate the radiation intensity and radiation suppression rate of the exhaust plume. The simulation environment of the exhaust plume flow field and the imaging simulation scene of the air-based infrared camera are designed. Through the mechanism of solid particle radiation suppression, the particle diameter, particle flow rate, and particle complex refractive index are determined as the main influencing factors of the radiation suppression rate. Simulation calculation results show that reducing the particle diameter and increasing the particle flow rate can enhance the radiation suppression ability of the solid particles. Increasing the particle absorption cross-section can enhance the radiation suppression ability of solid particles in the gas absorption waveband, and at the same time reduce their radiation suppression ability in the non-gas absorption waveband. In some cases, the solid particles may increase the radiation intensity of the exhaust plume and change the spectral radiation characteristics.

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