Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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Ignition of Fuel-rich Propellant Coated with Ignition Support Material in the Ramjet Combustor Condition

램젯 연소실 조건에서 점화보조제가 도포된 Fuel-rich 추진제의 점화

  • Jung, Woosuk (Department of Aerospace Engineering, Korea Advanced Institute of Science and Technology) ;
  • Baek, Seungkwan (Department of Aerospace Engineering, Korea Advanced Institute of Science and Technology) ;
  • Kim, Youngil (Department of Aerospace Engineering, Korea Advanced Institute of Science and Technology) ;
  • Kwon, Taesoo (2nd Research Division, Team 5, R&D Institute) ;
  • Park, Juhyun (2nd Research Division, Team 5, R&D Institute) ;
  • Kwon, Sejin (Department of Aerospace Engineering, Korea Advanced Institute of Science and Technology)
  • Received : 2017.02.03
  • Accepted : 2017.04.11
  • Published : 2017.08.01
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Abstract

Ignition test of the fuel-rich propellant coated with ignition support material in the ramjet combustor condition was conducted. Ignition delay and flame holding was measured. Fuel grain consist of HTPB mixed with AP particle 15 wt.%, Al particle 5 wt.%. To cause the short ignition delay, ignition support consist of $NC/BKNO_3$ and composite propellant was coated to the fuel grain. Ethanol blended $H_2O_2$ gas generator control the temperature, pressure, $O_2$ concentration in the oxidizer gas in the air. Gas is supplied with mass flux of $200kg/m^2s$. Through the test ignition support operated well and ignition delay of 0.6 second and the Flame was sustained.

램젯 연소실 조건에서 점화보조제가 도포된 Fuel-rich 추진제의 점화 실험을 수행하여 점화 지연과 연소 유지를 확인하였다. 연료 그레인은 HTPB에 AP 파우더 15 wt.%, Al 파우더 5 wt.%가 혼합된 형태로 구성되어 있다. 한편 연료 그레인에 $NC/BKNO_3$와 Composite 추진제로 이루어진 점화보조제를 도포하여 빠른 점화지연이 나타나도록 하였다. 에탄올 블렌딩 과산화수소 가스발생기를 통해 램젯 연소실의 공기와 가깝도록 온도, 압력, 산소 조성을 조절한 산화제 가스를 유속 $200kg/m^2s$으로 공급하였다. 실험 결과, 점화보조제가 잘 작동하여 연료그레인에서 0.6초의 점화 지연시간을 파악하였고 연소 중에는 화염이 유지되는 것을 확인하였다.

Keywords

References

  1. Philip, H. and Carl, P., "Mechanics and Thermodynamics of Propulsion," 2nd ed., Pearson, London, 1992.
  2. Kang, S.J., Park, C., Jung, W.S., Kwon, T.S., Park, J.H. and Kwon, S.J., "Design of Gun Launched Ramjet Propelled Artillery Shell with Inviscid Flow Assumption," Journal of the Korean Society of Propulsion Engineers, Vol. 19, No. 4, pp. 52-60, 2015. https://doi.org/10.6108/KSPE.2015.19.4.052
  3. Jung, W.S., Baek, S.K., Kwon, T.S., Park, J.H. and Kwon, S.J., "Ignition Test of Solid Fuel Ramjet Combustor," 52nd AIAA/SAE/ASEE Joint Propulsion Conference, Salt Lake City, U.T., U.S.A., AIAA 2016-4873, Jul. 2016.
  4. Krisnan, S., "Solid-Fuel Ramjet Assisted Gun-Launched Projectiles: An Overview," 5th National Conference on Airbreathing and Aerospace Propulsion, Hyderabad, India, pp. 52-64, Dec. 2000.
  5. Oosthuizen, R., Buisson, J.J. and Botha, G.F., "Solid Fuel Ramjet Propulsion for Artillery Porjectile Applications - Concept Development Overview," 19th International Symposium of Ballistics, Interlaken, Switzerland, pp. 403-410, May 2001.
  6. Dionisio, F. and Stockenstrom, A., "Aerodynamic Wind-tunnel Test of a Ramjet Projectile," 19th International Symposium of Ballistics, Interlaken, Switzerland, pp. 529-536, May 2001.
  7. Joghsh, K.N. and Ramakrishna P.A., "Development of AP/HTPB Based Fuel-rich Propellant for Solid Propellant Ramjet," 49 th Joint Propulsion Conferences, San Jose, C.A., U.S.A., AIAA 2013-4171, Jul. 2013.
  8. Bhat, V.K. and Brahmbhatt, R.H., "Development of AP/HTPB Based Fuel-Rich Propellant for Solid Propellant Ramjet Applications," Defense Science Journal, Vol. 46, No. 5, pp. 331-336, 1996. https://doi.org/10.14429/dsj.46.4300
  9. Jung, W.S., Baek, S.K., Kwon, T.S., Park, J.H. and Kwon, S.J., "Ignition of AP/HTPB based fuel-rich propellant in the ramjet combustor condition," 20th Korea Institute of Military Science and Technology Annual Conference, Jeju island, Korea, pp. 1797-1798, Jun. 2016.
  10. Rideal, E.K. and Robertson, A.J.B., "The spontaneous ignition of nitrocellulose," 3rd Symposium on Combustion and Flame Explosion Phenomena, M.A., U.S.A., Vol. 3, Issue 1, pp. 536-544, 1948.
  11. Rozumov, E., Carton P.A., Thelma, G.M., Joseph M.L., Kimberly, C., Duncan P. and Viral. P., "Nitrocellulose and BKNO3 Based Igniters for Gun Systems," MRS Proceedings, Wharton, N.J., U.S.A., Vol. 1405, 2011.
  12. Liang, J.H., Wang, S., Zhang, S.T., Yue, L.J., Fan, B.C., Zhang, X.Y. and Cui, J.P., "The vitiation effects of water vapor and carbon dioxide on the autoignition characteristics of kerosene," Acta Mechanica Sinica, Vol. 30, No. 4, pp. 55-59, 2014.
  13. McBride, B. and Gordon, S., "Computer Program for Calculation of Complex Chemical Equilibrium Compositions and Applications," NASA, Cleveland, O.H. U.S.A, NASA RP-1311, 1994.
  14. Baek, S.K., Kang. H.J. and Kwon, S.J., "Performance Evaluation of Commercial Grade Hydrogen Peroxide with Ethanol Blending," 45th Korean Society of Propulsion Engineers, Gyung-ju, Korea pp. 94-102, Nov. 2015.
  15. Lee, T.H., "Incoming Air Velocity verse Flame Propagation Speed," 46th Korean Society of Propulsion Engineers Conference, Jeju island, Korea, pp. 237-239, May 2016.
  16. Krishnan, S. and George, P., "Solid Fuel Ramjet Combustor Design," Aerospace Science and Technology, Vol. 34, pp. 219-256, 1998.