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고체/액체 혼합 입자 분사에 의한 항공기 노즐의 다상 유동에 관한 전산 해석COMPUTATIONAL ANALYSIS OF MULTIPHASE FLOW IN AIRCRAFT NOZZLES BY SOLID/LIQUID MIXED PARTICLE INJECTION

Other Titles
COMPUTATIONAL ANALYSIS OF MULTIPHASE FLOW IN AIRCRAFT NOZZLES BY SOLID/LIQUID MIXED PARTICLE INJECTION
Authors
류석희이유렬신창민명노신
Issue Date
2022
Publisher
한국전산유체공학회
Keywords
전산유체역학(CFD); 노즐 배기가스(Nozzle Exhaust Plume); 다상유동(Multiphase Flow); 혼합 입자 분사(Mixed Particle Injection); 열유동장(Thermal Flow Field); 적외선 신호(Infrared Signature)
Citation
한국전산유체공학회지, v.27, no.3, pp 89 - 99
Pages
11
Indexed
KCI
Journal Title
한국전산유체공학회지
Volume
27
Number
3
Start Page
89
End Page
99
URI
https://scholarworks.gnu.ac.kr/handle/sw.gnu/1966
DOI
10.6112/kscfe.2022.27.3.089
ISSN
1598-6071
Abstract
Infrared (IR) signals from the hot exhaust gases of aircraft engines have a significant impact on the survivability of aircraft. Several methods were developed to reduce IR signatures to avoid tracking by IR signatures generated in the exhaust, or decoy flares are used to deceive IR seekers. Research into injecting water particles to lower the exhaust gas temperature or injecting carbon particles to shield the plume has also been previously conducted. In this study, we propose a method for injecting solid/liquid mixed particles that lower the exhaust gas temperature and block IR signal propagation generated in the exhaust gas. The multiphase flow in aircraft nozzles by solid/liquid mixed particle injection was analyzed using the CFD code for the total flow rate of particles corresponding to 5%, 10%, and 20% of the exhaust gas flow rate. After analyzing the characteristics of the mixed particles interacting with the exhaust plume, the optimal flow rate of water and carbon particles with a small thrust penalty was obtained.
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