Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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Analysis and Verification of Infrared Signals from Engine Exhaust Gases for Basic Stealth Design of Military Aircraft

군용항공기 기초 스텔스 설계를 위한 엔진 배기가스 적외선 신호 해석 및 검증

  • Hwan Jeong (Department of Aeronautical.Mechanical Design Engineering, Korea National University of Transportation) ;
  • Minseok Kim (Department of Aeronautical.Mechanical Design Engineering, Korea National University of Transportation) ;
  • Taehun Kim (Department of Aeronautical.Mechanical Design Engineering, Korea National University of Transportation) ;
  • Chanseo Park (Department of Aeronautical.Mechanical Design Engineering, Korea National University of Transportation) ;
  • Muhyeon Seo (Department of Aeronautical.Mechanical Design Engineering, Korea National University of Transportation) ;
  • Hyemin Kim (Department of Aeronautical.Mechanical Design Engineering, Korea National University of Transportation)
  • Received : 2022.12.03
  • Accepted : 2023.03.21
  • Published : 2023.04.30
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Abstract

During the development process of an aircraft system, infrared stealth design was performed and a technique was developed and validated for analyzing infrared emissions from engine exhaust gases. Ansys Fluent was used to analyze the thermal flow of the engine exhaust gases and the obtained data on material fraction and temperature field was used to interpret infrared signals using the RADCAL program. To validate the results of the analysis, a comparison was made with existing experimental results using a micro-turbine engine, and it was confirmed that, despite a slightly lower spatial resolution than the experimental results, a high level of accuracy was achieved.

항공기 체계 개발 과정에서 적외선 스텔스 설계를 수행하고, 이를 검증하기 위한 엔진 배기가스 적외선 해석을 기법을 개발하고 검증하였다. 엔진 배기가스의 열유동을 해석하기 위해 Ansys Fluent를 사용하였고, 이를 통해 획득한 물질 분율 및 온도장 데이터를 활용, RADCAL 프로그램으로 적외선 신호를 해석하였다. 얻어진 해석 결과를 검증하기 위해 마이크로 터빈 엔진을 사용한 기존 실험 결과와 비교를 수행하였으며, 실험 결과에 비해 파수 해상도는 다소 떨어지지만 높은 수준의 정확도를 갖는 것을 확인하였다.

Keywords

Acknowledgement

본 논문은 2022년 공군사관학교 미래 항공우주 학술대회에서 입상하였으며, 추가 논문 투고에 대한 주최측의 허가를 득하였음.

References

  1. Zikidis, K., Skondras, A. and Tokas, C., "Low Observable Principles, Stealth Aircraft and Anti-Stealth Technologies," Journal of Computations and Modelling, Vol. 4, No. 1, pp. 129-165, 2014.
  2. Sexena, V.K., "Stealth and Counter-stealth: Some Emerging Thoughts and Continuing Debates," 2012.
  3. Gu, B. "Characterization and Reduction of Infrared Signature of a Micro Turbine Engine Diss," Ph.D. Dissertation, Korea Advanced Institute of Science and Technology, Korea, Daejeon, 2018.
  4. Rao, A. and Mahulikar, S., "Aircraft Powerplant and Plume Infrared Signature Modelling and Analysis," 43rd AIAA Aerospace Sciences Meeting and Exhibit, Reno, Nevada, U.S.A., January, 2005.
  5. Rao, A. and Mahulikar, S., "Integrated review of stealth technology and its role in airpower," The aeronautical journal, Vol. 106, No. 1066, pp. 629-642, 2002. https://doi.org/10.1017/S0001924000011702
  6. Choi, J., Jang, H., Kim, H. and Choi, S, "Infrared Signal Characteristics of Small Turbojet Engine Plume by Observation Angle," Journal of the Korean Society of Propulsion Engineers, Vol. 25, No. 4, pp. 28-35, 2021. https://doi.org/10.6108/KSPE.2021.25.4.028
  7. An, C., Kang, D., Baek, S., Myong, R., Kim, W. and Choi, S., "Analysis of plume infrared signatures of S-shaped nozzle configurations of aerial vehicle," Journal of Aircraft, Vol. 53, No. 6, pp. 1768-1778, 2016. https://doi.org/10.2514/1.C033685
  8. Choi, J., Jang, H., Kim, H. and Choi, S., "Plume IR characteristics of microturbine engine in various bypass ratios," Infrared Physics and Technology, Vol. 117, 103846, 2021.
  9. ANSYS Fluent, "ANSYS fluent user's guide, release 19.0," ANSYS, Inc., Canonsburg, P.A., U.S.A., 2018.
  10. Lecoustre, V., "RadCal Improvements to the Narrow-Band Model for Radiation Calculations in a Combustion Environment," NIST Special Publication 1402, 2014.
  11. Choi., J., "Plume IR Signature Characteristics of Turbofan Simulation Engine in Different Bypass Ratio and Measurement Angle," Master's thesis, Korea National University of Transportation, Korea, Chungju, 2020.
  12. Modest, M. and Mazumder, S., Radiative heat transfer, Academic press, Cambridge, Massachusetts, 4th ed., U.S.A., Ch. 10, 2021.
  13. Tien, C., "Thermal radiation properties of gases," Advances in Heat Transfer, Vol. 5, pp. 253-324, 1969. https://doi.org/10.1016/S0065-2717(08)70131-X
  14. Coenen, K., Gallucci, F., Mezari, B., Hensen, E. and van Sint Annaland, M., "An in-situ IR study on the adsorption of CO2 and H2O on hydrotalcites," Journal of CO2 Utilization, Vol. 24, pp. 228-239, 2018. https://doi.org/10.1016/j.jcou.2018.01.008
  15. Cho, P., Gu, B., Baek, S. and Kim, W., "Infrared Signature Analysis of the Aircraft Exhaust Plume with Radiation Database," Journal of the Korean Society for Aeronautical and Space Sciences, Vol. 44, No. 7, pp. 568-575, 2016. https://doi.org/10.5139/JKSAS.2016.44.7.568
  16. Rao, A., "Infrared Signature Modeling and Analysis of Aircraft Plume," International Journal of Turbo and Jet Engines, Vol. 28, pp. 187-197, 2011. https://doi.org/10.1515/tjj.2011.023
  17. Chae, J., Lee, J., Lee, J., Ha, N., Kim, D., Jang, H. and Myong, R., "Computational analysis of effects of thermal flow field and chemical components on the IR signature in the exhaust plume of a micro jet engine," Journal of Computational Fluids Engineering, Vol. 24. No. 3, pp. 101-111, 2019. https://doi.org/10.6112/kscfe.2019.24.3.101