한국전산유체공학회지 (Journal of computational fluids engineering)

한국전산유체공학회 (Korean Society of Computational Fluids Engineering)
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마이크로 터보제트 엔진 노즐 유동장에 관한 CFD 전산해석 및 스케일링 특성 연구

COMPUTATIONAL INVESTIGATION OF NOZZLE FLOWFIELD IN A MICRO TURBOJET ENGINE AND ITS SCALING CHARACTERISTICS

  • 이현진 (경상대학교 대학원 기계항공공학부) ;
  • 안창환 (경상대학교 대학원 기계항공공학부) ;
  • 명노신 (경상대학교 대학원 기계항공공학부) ;
  • 최성만 (전북대학교 항공우주공학과) ;
  • 김원철 (국방과학연구소 제7기술연구본부)
  • Lee, H.J. (Graduate School of Mechanical and Aerospace Engineering, Gyeongsang Nat'l Univ.) ;
  • An, C.H. (Graduate School of Mechanical and Aerospace Engineering, Gyeongsang Nat'l Univ.) ;
  • Myong, R.S. (Graduate School of Mechanical and Aerospace Engineering, Gyeongsang Nat'l Univ.) ;
  • Choi, S.M. (Dept. of Aerospace Engineering, Chonbuk Nat'l Univ.) ;
  • Kim, W.C. (The 7th Research and Development Institute, Agency for Defense Development)
  • 투고 : 2016.07.20
  • 심사 : 2017.03.06
  • 발행 : 2017.03.31
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초록

Thermal flowfield of a micro turbojet engine was computationally investigated for exhaust nozzles with different aspect ratio and curvature. Special attention was paid to maximum and average temperature of the nozzle surface and the exhaust nozzle plume. The IR signatures of the micro turbojet engine nozzle were then calculated through the narrow-band model based on thermal flowfield data obtained through CFD analysis. Finally, in order to check the similarity of thermal flowfields and IR signature of the sub-scale micro turbojet engine model and the full-scale UCAV propulsion system, several non-dimensional parameters associated with temperature and optical property of plume were introduced. It was shown that, in spite of some differences in actual values of non-dimensional parameters, the scaling characteristics on spectral feature of IR signature and effects of aspect ratio and curvature of nozzle configuration remain similar in sub-scale and full-scale cases.

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참고문헌

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피인용 문헌

  1. Double Serpentine 노즐의 단면적과 비행조건 변화에 따른 UCAV의 플룸 유동장 및 IR 특성 연구 vol.49, pp.8, 2017, https://doi.org/10.5139/jksas.2021.49.8.689