한국추진공학회지 (Journal of the Korean Society of Propulsion Engineers)

  • 제16권5호
  • /
  • Pages.29-36
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  • 2012
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  • 1226-6027(pISSN)
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  • 2288-4548(eISSN)
한국추진공학회 (The Korean Society of Propulsion Engineers)
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FASTRAC 연소기에서 음향공을 이용한 연소불안정 제어 사례 연구

Case Study on Combustion Stabilization in FASTRAC Thrust Chamber Using Acoustic Cavities

  • 김홍집 (충남대학교 기계공학과) ;
  • 김성구 (한국항공우주연구원 연소기팀)
  • 투고 : 2012.05.25
  • 심사 : 2012.09.17
  • 발행 : 2012.10.01
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초록

연소시험을 통한 성공/실패 사례가 있는 FASTRAC 연소기에 대해, 효용성이 검증된 3차원 선형 음향해석을 수행하여 음향공의 물성치 변화에 따른 감쇠 특성을 파악하였다. 음향공의 동조주파수와 감쇠능력을 정량화하기 위해 음향 임피던스 개념을 도입하였다. 기하학적 형상이 주어진 상태에서, 음향공 내부의 음속 변화에 따라 최적의 동조가 가능한 음속을 파악하였다. 최적의 동조가 이루어지기 위한 음향공 내부의 음속 예측 방법을 제시하였다. 이를 통하여 여러 기하학적 형상을 가지는 음향공에 대하여 적용하여 감쇠능력을 정량화함으로써 연소안정성의 확보 여부에 대한 검토가 가능할 것이며, 안정성이 확보되지 못한 경우에 대해서는 그 이유를 명확하게 규명할 수 있을 것이다.

3-D linear acoustic analysis has been performed to elucidate damping characteristics of large Helmholtz acoustic cavities in FASTRAC thrust chamber. Acoustic impedance concept has been introduced to quantify combustion stabilization capacity. For a given acoustic cavity, sonic velocity in the cavity to achieve an optimal tuning has been determined and satisfactory agreement with the previous results has been obtained. Feasible estimation of sonic velocity in the acoustic cavity has been devised. Results show similar trends without significant deviations, which can be used in the procedure of design and verification of acoustic cavity. From the satisfactory results, investigation of other thrust chambers with acoustic cavities which have shown combustion instabilities will be done as future works.

키워드

참고문헌

  1. Harrje, D. T. and Reardon, F. H., "Liquid Propellant Rocket Combustion Instability," NASA SP-194, 1972
  2. NASA, "Liquid Rocket Engine Combustion Stabilization Devices," NASA SP-8113, 1974
  3. Oefelein, J. C. and Yang, V., "Comprehensive Review of Liquid-Propellant Combustion Instabilities in F-1 Engines," Journal of Propulsion and Power, Vol. 9, No. 5, 1993, pp.657-677 https://doi.org/10.2514/3.23674
  4. Natanzon, M. S., Combustion Instability, (Natanzon, M. S. and Culick, F. E. C., eds), 1996
  5. Laudien, E., Pongratz, R., Pierro, R., and Preclik, D., "Experimental Procedures Aiding the Design of Acoustic Cavities," in Liquid Rocket Engine Combustion Instability (Yang, V. and Anderson, W. E., eds), Progress in Astronautics and Aeronautics, Vol. 169, AIAA, Washington DC, 1995, pp.377-399
  6. Oberg, C. L., "Combustion Stabilization with Acoustic Cavities," Journal of Spacecraft and Rockets, Vol. 8, No. 12, 1971, pp.1220-1225. https://doi.org/10.2514/3.30366
  7. Rocker, M. and Nesman, T. E., "Elimination of High-Frequency Combustion Instability in the Fastrac Engine Thrust Chamber," The Tenth Annual Symposium of the Penn State University Propulsion Engineering Research Center, 1998, pp.9-17
  8. Christensen, E. and Nesman, T., "Fastrac Rocket Engine Combustion Chamber Acoustic Cavities," The Tenth Annual Symposium of the Penn State University Propulsion Engineering Research Center, 1998, pp.18-23
  9. McGough, C. B., McBride, J. M., and Hewitt, R. A., "Acoustic Liner Feasibility Program," NASA CR-111405, 1970
  10. Wicker, J. M., Yoon, M. W., and Yang, V., "Linear and Non-linear Pressure Oscillations in Baffled Combustion Chambers," Journal of Sound and Vibration, Vol. 184, No. 1, 1995, pp.141-171 https://doi.org/10.1006/jsvi.1995.0309
  11. Sohn, C. H., and Kim, Y. M., 2002, "A Numerical Study on Acoustic Behavior in Combustion Chamber with Acoustic Cavity," Journal of the Korean Society for Aeronautical and Space Sciences, Vol. 30, No. 4, pp.28-37 https://doi.org/10.5139/JKSAS.2002.30.4.028
  12. Kim, S.-K., Kim, H. J. and Sohn, C. H., 2004, "Development of Analysis Code for Evaluation of Acoustic Stability of Rocket Engine Combustor with Various Designs," Journal of the Korean Society for Aeronautical and Space Sciences, Vol. 32, No. 6, pp.110-116 https://doi.org/10.5139/JKSAS.2004.32.6.110
  13. Kim, H. J., Kim, S.-K. and Seol, W. S., 2004, "Acoustic Analysis for Design Optimization of Hub-Blade Baffle in Liquid Rocket Engine," Transactions of KSME(B), Vol. 28, No. 8, pp.945-952
  14. Morse, P. M. and Ingard, K. U., Theoretical Acoustics, 1st ed., Princeton Univ. Press, 1968
  15. 이병호, 음향학, 민음사, 1999
  16. Kim, H. J. and Kim, S.-K., 2006, "A Study on the Acoustic Damping Characteristics of Acoustic Cavities in a Liquid Rocket Combustor," Transactions of KSME(B), Vol. 30, No. 1, pp.32-40
  17. Tsuji, T., Tsuchiya, T. and Kagawa, Y., 2002, "Finite Element and Boundary Element Modelling for the Acoustic Wave Transmission in Mean Flow Medium," Journal of Sound and Vibration, Vol. 255, No. 5, pp.849-866 https://doi.org/10.1006/jsvi.2001.4189
  18. Sohn, C. H., 2002, "A Numerical Study on Acoustic Behavior in Baffled Combustion Chambers," Transactions of the KSME(B), Vol. 26, No. 7, pp.966-975
  19. Sohn, C. H., Kim, S. K. and Kim, Y. M., 2004, "Effects of Various Baffle Designs on Acoustic Characteristics in Combustion Chamber of Liquid Rocket Engine," Journal of Mechanical Science and Technology, Vol. 18, No. 1, pp.145-152
  20. Kim, S.-K., Sohn, C. H. and Kim, H. J., 2004, "Acoustic Analysis of LRE Combustion Chamber with Various 5-Blade Baffles Under Non-Reacting Condition," Journal of the Korean Society for Aeronautical and Space Sciences, Vol. 32, No. 2, pp.74-81 https://doi.org/10.5139/JKSAS.2004.32.2.074
  21. Ko, Y. S., Lee, K. J. and Kim, H. J., 2004, "Acoustic Tests on Atmospheric Condition in a Liquid Rocket Engine Chamber," Transactions of KSME(B), Vol. 28, No. 1, pp.16-23
  22. Hernandez, R., Ito, J. I., and Niiya, K. Y., "Carbon Deposition Model for Oxygen-Hydrocarbon Combustion," Interlim Final Report2427-IFR for Contract NAS8-34715, 1987, p.119