Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
권호 표지

Spray Structure and Cross-section Characteristics of Pulsed Liquid Jet Injected into a Cross-flow

횡단 유동장으로 펄스 분사된 액체 제트의 분무 구조 및 단면 분포 특성

  • 이인철 (한국항공대학교 항공우주 및 기계공학부) ;
  • 구자예 (한국항공대학교 항공우주 및 기계공학부)
  • Published : 2009.04.30
Download PDF
⟨ Previous Next ⟩

Abstract

Present studies of these experiments was conducted to using water, over a range of cross-flow velocities from 42 to 136 m/s, with injection frequencies from 35.7 to 166.2 Hz. In cross-flow field, main parameters of liquid jet for secondary breakup were cross-flow drag rather than pressure pulse frequency. As oscillation of the periodic pressure, liquid jet was moved up and down. Also, a bulk of liquid jet puff was detected at upper field of liquid surface. Because of pressure pulsation frequency, an inclination of SMD for the structured layer was evanescent. Cross-sectional characteristics of SMD at downstream area were non-structured distributions. The tendency of volume flux value for various frequency of pressure pulse was same distribution. And volume flux was decreased when the frequency of pressure pulse increasing.

횡단류로 펄스 분사되는 액체제트의 분무 특성을 연구하기 위하여 35.7 ~ 166.2Hz 범위의 분사 주파수와 횡단류 속도 42 ~ 136 m/s의 조건에서 실험을 수행하였다. 횡단 유동장에서 액체제트의 주된 분열 인자는 압력 펄스 주파수의 영향보다는 횡단류의 항력에 의존하며, 주기적인 압력 진동에 의해 횡단류로 분사된 액체제트는 상하 진동하는 특성을 나타냈다. 또한 액적의 집합체(liquid jet puff)가 횡단류 방향의 액체 제트 표면에 나타났으며, 이러한 두 가지 특성을 통해 유동장의 혼합을 예상할 수 있었다. 압력 펄스 주파수에 의한 SMD 특성은 연속 분사의 층상 구조와 다른 비층상 구조로 나타났으며, 체적 유속은 압력 펄스 주파수가 증가함에 따라 감소하는 경향을 나타내었다.

Keywords

References

  1. Yatsuyanagi, N., Chinzei, N., Mitani, T., Wa kamatsu, Y., Masuya, G., Iwagami, S., Endo, M., Hanus, G., 'Ramjet Engine Test Facility In NAL-KRC, Japan,' AIAA-98-1511, 1998
  2. 김채형, 정은주, 정인석, 강상훈, 양수석, '초음속 유동 내 공동을 이용한 수직 분사 혼합 및 연료 침투거리에 관한 연구,' 한국추진공학회지, 제12권, 제2호, 2008, pp.24-32
  3. Law, C.K., 'Mechanics of Flame Stabilization in Subsonic and Supersonic Flows,' Major R esearch Topics in Combustion, Springer-Verlag, 1911
  4. Landau, A.H., Yeneriz, M.A., 'Parametric Su personic Combustion Ramjet Engine Optimiz ation,' AIAA-65-446, 1965
  5. Yi. T., Cornwell. M., Gutmark. E.J., 'Dynamics and Control of a High Frequency Fuel V alve and its Application to Active Combusti on Control,' 40th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, Fort Lauderdale Florida, 11-14 July, 2007
  6. Dano, B., Liburdy, K., 'Vortical Structure of a 45 Degree Inclined Pulsed Jet in cross-flow,' AIAA-2006-3543, 36th AIAA Fluid Dynamics Conference and Exhibit, San Francisco, California, 5-8 June, 2006
  7. Deepe, J.M., Lee, J.G., and Santavicca, D.A., 'Effect of Weber Number on the Fuel Transfer Function for Modulated Liquid Jets,' 44th AIAA Aerospace Sciences Meeting and Exhibit, Reno, 2006
  8. Kouchi, T., Sakuranaka, N., Izumikawa, M., Tomioka, S., 'Pulsed Transverse Injection Applied to a Supersonic Flow,' 43rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 8-11 July, Cincinnati, OH, 2007
  9. Dziuba, M., Fay, J., and Rossmann, T., "Detailed Study of Mixing Enhancement by Jet Modulation and Oblique Injection," AIAA-2007-117, 45th AIAA Aerospace Sciences Meeting and Exhibit, Reno, Nevada, 8-11 Jan, 2007
  10. Elshamy, O. M., "Experimental Investigatio ns of Steady and Dynamic Behavior of Tra nsverse Liquid Jets," Ph.D. Dissertation, Department of Aerospace Engineering and Engineering Mechanics, University of Cincinn ati, Cincinnati, OH, 2007
  11. Bloxidge, G.J., Dowling, A.P., Hooper, N., and Langhorne, P.J., 'Active Control of an Acoustically Driven Combustion Instability, ' AIAA J. 26, 1998, pp.783