Simulation Analysis on the Characteristics of Aerosol Particles to Inhibit the Infrared Radiation of Exhaust Plumes
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Published:2024-07-15
Issue:14
Volume:17
Page:3505
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ISSN:1996-1944
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Container-title:Materials
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language:en
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Short-container-title:Materials
Author:
Li Wei12, Wang Yurou13, Zhang Lei24, Gao Baohai13ORCID, He Mingjian13
Affiliation:
1. School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China 2. Shenyang Aircraft Design and Research Institute, Aviation Industry Corporation of China, Shenyang 110035, China 3. Key Laboratory of Aerospace Thermophysics, Ministry of Industry and Information Technology, Harbin 150001, China 4. National Key Laboratory of Electromagnetic Information Control and Effects, Aviation Industry Corporation of China, Shenyang 110035, China
Abstract
Aerosol infrared stealth technology is a highly effective method to reduce the intensity of infrared radiation by releasing aerosol particles around the hot exhaust plume. This paper uses a Computational Fluid Dynamics (CFD) two-phase flow model to simulate the exhaust plume fields of three kinds of engine nozzles containing aerosol particles. The Planck-weighted narrow spectral band gas model and the Reverse Monte Carlo method are used for infrared radiation transfer calculations to analyze the influencing factors and laws for the suppression of the infrared radiation properties of exhaust plumes by four typical aerosol particles. The simulation calculation results show that the radiation suppression efficiency of aerosol particles on the exhaust plume reaches its maximum value at a detection angle (ϕ) of 0° and decreases with increasing ϕ, reaching its minimum value at 90°. Reducing the aerosol particle size and increasing the aerosol mass flux can enhance the suppression effect. In the exhaust plume studied in this paper, the radiation suppression effect is best when the particle size is 1 μm and the mass flux is 0.08 kg/s. In addition, the inhibition of aerosol particles varies among different materials, with graphite having the best inhibition effect, followed by H2O, MgO, and SiO2. Solid particles will increase the radiation intensity and change the spectral radiation characteristics of the exhaust plume at detection angles close to the vertical nozzle axis due to the scattering effect. Finally, this paper analyzed the suppression effects of three standard nozzle configurations under the same aerosol particle condition and found that the S-bend nozzle provides better suppression.
Funder
National Natural Science Foundation of China CGN-HIT Advanced Nuclear and New Energy Research Institute China Postdoctoral Science Foundation
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