한국추진공학회지 (Journal of the Korean Society of Propulsion Engineers)

  • 제21권3호
  • /
  • Pages.68-75
  • /
  • 2017
  • /
  • 1226-6027(pISSN)
  • /
  • 2288-4548(eISSN)
한국추진공학회 (The Korean Society of Propulsion Engineers)
권호 표지
DOI QR코드

DOI QR Code

팽창비가 고정된 듀얼 벨 노즐의 천이특성에 대한 수치해석 연구

Numerical Study on Transition Characteristics of Dual Bell Nozzle with Expansion Ratio Fixed

  • Choi, Junsub (Department of Aerospace Engineering, Graduate School at Chungnam National University) ;
  • Huh, Hwanil (Department of Aerospace Engineering, Chungnam National University)
  • 투고 : 2017.04.04
  • 심사 : 2017.05.13
  • 발행 : 2017.06.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

듀얼 벨 노즐은 고도 보정 노즐의 일종으로 일반적인 벨 노즐의 탈설계점에서의 비추력 손실을 최소화할 수 있는 노즐이다. 본 논문에서는 팽창비가 고정된 듀얼 벨 노즐의 천이특성을 파악하기 위하여 전산수치해석을 수행하였다. 주요 설계변수로는 확장부 길이와 변곡각 크기를 선정하였다. 확장부 길이가 증가할수록 천이고도 및 천이지속시간은 증가하였고, 추력계수 감소폭은 감소하였다. 변곡각 크기가 증가할수록 천이고도 및 천이지속시간은 감소하였고, 추력계수 감소폭은 증가하였다.

Dual bell nozzle is a type of altitude compensation nozzle, which is a nozzle that minimize the losses of the specific impulse at the off-design point of a typical bell nozzle. In this paper, numerical computations are performed to understand the transition characteristics of dual bell nozzles with fixed expansion ratios. The major design variables are the length of extension and the angle of inflection. As the length of the extension increased, the transition altitude and transition duration increased and the reduction of the thrust coefficient decreased. As the angle of inflection increased, the transition altitude and transition duration decreased and the reduction of the thrust coefficient increased.

키워드

참고문헌

  1. Hagemann, G., Immich, H., Nguyen, T.V. and Dumnov, G.E., "Advanced Rocket Nozzles," Journal of Propulsion and Power, Vol. 14, No. 5, pp. 620-634, 1998. https://doi.org/10.2514/2.5354
  2. Choi, J. and Huh, H., "Technology Review and Development Trends of Dual-Bell Nozzle for Altitude Compensation," Journal of The Korean Society for Aeronautical and Space Sciences, Vol. 43, No. 5, pp. 456-465, 2015. https://doi.org/10.5139/JKSAS.2015.43.5.456
  3. Choi, J., Hwang, H. and Huh H., "Technology Review of an E-D Nozzle for Altitude Compensation Purpose," The Korea Society of Propulsion Engineers Spring Conference, Busan, Korea, pp. 80-83, May 2015.
  4. Kim, J. and Huh, H., "Characteristics and Key Parameters of Duel Bell Nozzles of the DLR, Germany," Journal of The Korean Society for Aeronautical and Space Sciences, Vol. 43, No. 11, pp. 952-962, 2015. https://doi.org/10.5139/JKSAS.2015.43.11.952
  5. Foster, C.R. and Cowles, F.B., Experimental Study of Gas-Flow Separation in Overexpanded Exhaust Nozzles for Rocket Motors, Jet Propulsion Lab., California Inst. of Technology, Progress Rept. pp. 4-103, Pasadena, CA, U.S.A., 1949.
  6. Genin, C., Stark, R., Haidn, O., Quering, K. and Frey, M., Experimental and numerical study of dual bell nozzle flow, Progress in Flight Physics, Vol. 5, Torus Press, Moscow, pp. 363-376, 2013.
  7. Frey, M. and Hagemann, G., "Critical Assessment of Dual-Bell Nozzles," Journal of Propulsion and Power, Vol. 15, No. 1, pp. 137-143, 1999. https://doi.org/10.2514/2.5402
  8. Genin, C. and Stark, R., "Experimental Study on Flow Transition in Dual Bell Nozzles," Journal of Propulsion and Power, Vol. 26, No. 3, pp. 497-502, 2010. https://doi.org/10.2514/1.47282
  9. Genin, C., Stark, R., Karl, S. and Schneider, D., "Numerical Investigation of Dual Bell Nozzle Flow Field," 48th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, G.A., U.S.A., AIAA 2012-4164, Sep. 2012.
  10. Kim, J., Choi, J. and Huh, H., "Preliminary CFD Results of a Dual Bell Nozzle based of the KSLV-II," Journal of the Korean Society of Propulsion Engineers, Vol. 20, No. 6, pp. 18-28, 2016. https://doi.org/10.6108/KSPE.2016.20.6.018
  11. Moon, Y. and Nam, C., "A Study of KSLV-II Engine System Development Test Program," The Korea Society of Propulsion Engineers Spring Conference, Busan, Korea, pp. 732-736, May 2013.
  12. Choi, H., Han, Y., Ryu, C. and Kim, S., "Analytic Considerations of Liquid Rocket Engine Thrust Chamber Design for the KSLV-II," Journal of The Korean Society of Propulsion Engineers, Vol. 14, No. 4, pp. 71-80, 2010.
  13. Kim, S., Moon, Y. and Park, T., "Development of Chemical Equilibrium CFD Code for Performance Prediction and Optimum Design of LRE Thrust Chamber," Journal of The Korean Society of Propulsion Engineers, Vol. 9, No. 1, pp. 1-8, 2005.
  14. Genin, C. and Stark, R., "Side Loads in Dual Bell Nozzles, Part 2 Design Parameters," 46th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, Nashville, T.N., U.S.A., AIAA 2010-6730, Jul. 2010.

피인용 문헌

  1. Specific Impulse Gain for KSLV-II with Combination of Dual Bell Nozzle and Expansion-Deflection Nozzle vol.22, pp.1, 2018, https://doi.org/10.6108/KSPE.2018.22.1.016