Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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Study on Spray Visualization and Atomization Characteristics of Air-assist Type Injector for Scramjet Engine

스크램제트 엔진용 공기 보조형 인젝터의 분무 가시화 및 미립화 특성에 관한 연구

  • Lee, Jinhee (School of Aerospace System Engineering, University of Science and Technology) ;
  • Lee, Sanghoon (Engine System Research Team, Korea Aerospace Research Institute) ;
  • Lee, Kyungjae (Engine System Research Team, Korea Aerospace Research Institute) ;
  • Kim, Jaiho (Engine System Research Team, Korea Aerospace Research Institute) ;
  • Yang, Sooseok (Engine System Research Team, Korea Aerospace Research Institute)
  • Received : 2017.04.02
  • Accepted : 2017.06.28
  • Published : 2017.10.01
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Abstract

As a part of the development procedures of scramjet engine with a regenerative cooling system, this experiment was performed using air-assist type injectors for scramjet engine. Two types of injectors were used in this experiment with the 90 and 60 degrees of the injection angle to the main flow. Mie-scattering was used for spray visualization and PDPA was used for the measurement of the atomization characteristics. It was found that increasing the pressure of supplied gas and the distance from nozzle tip led to the enhancement atomization characteristics and the injector with 60 degrees injection angle has better atomization characteristics than 90 degrees injector.

재생냉각 기술을 적용한 스크램제트 엔진 개발의 일환으로 스크램제트 엔진에 사용될 공기 보조형 인젝터(Air-assist type injector)에 대한 연구를 수행하였다. 실험에 사용된 인젝터는 주 유동에 대해 $90^{\circ}$와 $60^{\circ}$의 각도로 분출되는 두 종류의 인젝터를 사용하였으며 측정 방법에는 미 산란(Mie-scattering)을 이용한 가시화 측정방법과 PDPA를 이용한 미립화 측정 방법을 사용하였다. 실험 결과, 공급되는 기체의 압력 증가와 노즐로부터의 거리가 증가할수록 더 좋은 미립화 특성을 보였으며 분출각도가 $60^{\circ}$인 인젝터가 $90^{\circ}$의 인젝터보다 더 좋은 미립화 특성을 보였다.

Keywords

References

  1. Yang, I.Y., Lee, Y.J., Lee, K.J., Choi, S.M. and Park, C., "Combustion Experiments for a liquid hydrocarbon fueled Mach 5 Scramjet engine model," Journal of Propulsion and Power, Vol. 30, No. 5, pp. 1433-1438, 2014. https://doi.org/10.2514/1.B35025
  2. Ben-Yakar, A., and Hanson, R.K., "Cavity flame-holders for ignition and flame stabilization in scramjets: an overview," Journal of Propulsion and Power, Vol. 17, No. 4, pp. 869-877, 2001. https://doi.org/10.2514/2.5818
  3. Liu, H., Science and Engineering of Droplets: Fundamentals and Applications, William Andrew, New York, N.Y., U.S.A., 1999.
  4. Pandey, K.M. and Sivasakthivel, T., "Recent advances in scramjet fuel injection - a review," International Journal of Chemical Engineering and Application, Vol. 1, No. 4, pp. 294-301, 2010.
  5. Mie, G., "Beitrage zur Optik Median, speziell kolloidater Metallosungen," Annalen der physik, Vol. 330, No. 3, pp. 377-445, 1908. https://doi.org/10.1002/andp.19083300302
  6. Hahn, D.W., "Light scattering theory," Department of Mechanical and Aerospace Engineering, Florida, F.L., U.S.A., Jul. 2009.
  7. Houser, M.J., "Phase/Doppler spray anlayzer for simultaneous measurements of drop size and velocity distribution," Optical Engineering, Vol. 23, No. 5, pp. 583-590, 1984.
  8. Bachalo, W.D., Rudoff, R.C. and Brena de La Rosa, A., "Mass flux measurements of a high number density spray system using the phase Doppler particle analyzer," 26th AIAA Aeropsace Sciences Metting, Reno, N.V., U.S.A., AIAA-88-0236, Jan. 1988.
  9. Kim, Y.M., Yang, I.Y., Lee, K.J. and Lee, Y.J., "Study for combustion characteristics of a Scramjet engine used barbotage injector," 39th Korean Society of Propulsion Engineers Fall Conference, Yeosu, Korea, pp. 186-189, Nov. 2012.
  10. Otsu, N., "A threshold selection method from gray-level histograms," IEEE transactions on systems, man, and cybernetics, Vol. 9, No. 1, pp. 62-66, 1979. https://doi.org/10.1109/TSMC.1979.4310076