Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Spray Characteristics of Single and Double Liquid Jets in Crossflow

주류유동에서 단일 및 이중 수직분사 분무특성

  • Received : 2011.10.21
  • Accepted : 2012.02.13
  • Published : 2012.05.01
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Abstract

Spray characteristics of liquid jets in crossflow, which can be observed in the liquid jet injection system of a gas turbine or ramjet engine, were experimentally investigated. By measuring liquid jet penetration in the case of single orifice and double orifice injectors, the experimental formula for jet penetration was modified to consider penetration distances greater than that considered in a previous study. The changes in spray characteristics resulting from changes in the liquid jet and crossflow pressure, including SMD and jet disintegration, were carefully studied. Specifically, the jet penetration was measured for different injector shapes, and in the case of a double orifice injector, the penetration of the rear orifice jet was found to be greater by approximately 20% ($L_h$ = 4 mm) compared to that in the case of a single orifice injector because of the influence of the front orifice.

연소실 내의 주류 공기유동에 미치는 영향을 최소화하면서 미립화 및 혼합특성을 향상시키기 위한 방법으로 주류공기 유동에 대해 수직방향의 연료분사 방식이 실용 엔진에서 많이 사용되고 있고, 관련 연구도 활발히 보고되고 있다. 본 연구는 가스터빈이나 램젯 엔진에서 사용되고 있는 수직분사의 분무특성은 실험적으로 조사하고, 단일 및 이중 수직분사에 따른 침투길이를 측정함으로써 선행연구에 의해 보고된 결과와 비교하였다. 또한 압력과 모멘텀 플럭스비 변화에 따른 침투길이, 분무입경 등의 분무 특성을 연구하였다. 특히, 이중 수직분사의 침투길이는 단일 수직분사의 침투길이에 비해 전단의 수직분사의 영향으로 후단의 수직분사 길이가 약 20% ($L_h$=4mm) 증가함을 확인할 수 있었다.

Keywords

References

  1. Karagozian, A. R., 2010, "Transverse Jets and Their Control," Progress in Energy and Combustion Science, Vol.36, No.5, pp.531-553. https://doi.org/10.1016/j.pecs.2010.01.001
  2. Abbitt, J. S., Segal, C., McDaniel, J. C., Krauss, R. H. and Whitehurst, R.B., 1993, "Experimental Supersonic Hydrogen Combustion Employing Staged Injection Behind a Rearward-Facing Step," Journal of Propulsion and Power, Vol. 9, pp. 472-478. https://doi.org/10.2514/3.23646
  3. Wang, K. S. C., Smith, O. I. and Karagozian A. R., 1995, "In-Flight Imaging of Gas Jets Injected into Subsonic and Supersonic Crossflows," AIAA Journal, Vol. 33, No. 12, pp. 2259-2263. https://doi.org/10.2514/3.12977
  4. Curran, E. T., 2001, "Scramjet Engines: the First Forty Years," Journal of Propulsion and Power, Vol. 17, No. 6, pp. 1138-1148. https://doi.org/10.2514/2.5875
  5. Jones, R., 1981, "Firebird Ramjet Propulsion System Development," 8th JANNAF Combustion Meeting, Vol. 3.
  6. Lefevre, A. H., 1983, "Gas Turbine Combustion". Hemisphere Publishing Corporation.
  7. Schetz, J. A. and Padhye, A., 1977, "Penetration and Breakup of Liquids in Subsonic Airstreams," AIAA Journal, Vol. 15, No.10, pp. 1385-1390. https://doi.org/10.2514/3.60805
  8. Hussein, G. A., Jasuja, A. K. and Fletcher, R. S., 1983, "Penetration and Break-up Behaviour of a Discrete Liquid Jet in a Cross Flowing Airstream - A Further Study," American Society of Mechanical Engineers, 28th International Gas Turbine Conference and Exhibit.
  9. Ingebo, R. D., 1985, "Aerodynamic Effect of Combustor Inlet Air Pressure on Fuel Jet Atomization," Journal of Propulsion and Power, Vol. 1, pp. 137-142. https://doi.org/10.2514/3.22771
  10. Inamura, T. and Nagai, N., 1997, "Spray Characteristics of Liquid Jet Traversing Subsonic Airstream," Journal of Propulsion and Power, Vol. 13, No. 12, pp. 250-256. https://doi.org/10.2514/2.5156
  11. Wu, P. K., Kirkendall, K. A., Fuller, R. P. and Nejad, A. S., 1998, "Spray Structures of Liquid Jets Atomized in Subsonic Crossflows," Journal of Propulsion and Power, Vol.14, No. 2, pp.173-182. https://doi.org/10.2514/2.5283
  12. Leong, M. Y., McDonell, V. G. and Samuelsen, G. S., 2001, "Effect of Ambient Pressure on an Airblast Spray Injected into a Crossflow," Journal of Propulsion and Power, Vol.17, No.5, pp.1076-1984. https://doi.org/10.2514/2.5846
  13. Lakhamraju, R. R. and Jeng, S. M., 2005, "Liquid Jet Breakup Studies in Subsonic Air Stream at Elevated Temperatures," ILASS-Americas, Irvine, CA.
  14. Becker, J. and Hassa, C., 1999, "Breakup and Atomization of a Kerosene Jet in Crossflow of Air at Elevated pressure," ILASS- Europe, Toulouse, France
  15. Tambe, S. B., Jeng, S. M., Mongia, H. and Hsiao, 2005, "Liquid Jets in Subsonic Crossflow," 43rd AIAA Aerospace Sciences Meeting and Exhibit, 10-13 Jan. 2005, Reno, Nevada, AIAA paper 2005-731.
  16. No, S. Y., 2011, "Empirical Correlations for Penetration Height of Liquid Jet in Cross Flow-A Review," ILASS-Europe. Estoril, Portugal.
  17. Song, J. K., Ahn, K. B., Kim, M. K., and Yoon, Y. B., 2011, "Effects of Orifice Internal Flow on Liquid Jets in Subsonic Crossflows," Journal of Propulsion and Power. Vol. 27, No. 3. pp. 608-618. https://doi.org/10.2514/1.B34011

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