Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on High-Temperature Fuel Injection Characteristics through Swirl Injectors

스월 인젝터를 통한 고온 연료의 분사특성 연구

  • Lee, Hyung Ju (Advanced Propulsion Technology Center, Agency for Defense Development) ;
  • Choi, Hojin (Advanced Propulsion Technology Center, Agency for Defense Development) ;
  • Kim, Ildoo (Advanced Propulsion Technology Center, Agency for Defense Development) ;
  • Hwang, Ki-Young (Advanced Propulsion Technology Center, Agency for Defense Development)
  • Received : 2013.06.03
  • Accepted : 2013.10.19
  • Published : 2013.12.01
Download PDF
⟨ Previous Next ⟩

Abstract

An experimental study was conducted to investigate fuel injection characteristics through swirl injectors when the fuel was heated to very high temperature conditions. Three swirl injectors with different orifice diameters and swirler geometries were used to measure the flow coefficient (${\alpha}$) for the injection pressure ranges between 3 and 10 bar and the fuel temperature from 50 to $270^{\circ}C$. The results showed that the variation characteristics of ${\alpha}$ with respect to cavitation number ($K_c$) were highly dependent on both the orifice diameter and the swirler geometry. In addition, the characteristics of ${\alpha}$ variation with respect to AR, the area ratio of the flow through the swirler and the orifice, has revealed that the effect of boiling is retarded but the slope of decreasing ${\alpha}$ after the boiling effect is present tumbles as AR increases.

본 연구에서는 고온으로 가열된 연료가 다양한 종류의 스월 인젝터를 통해 분사되는 경우 분사 특성의 변화를 실험적으로 확인하였다. 3종의 스월 인젝터로 3 ~ 10 bar의 분사압력을 가하면서 연료온도가 $50{\sim}270^{\circ}C$ 범위에서 변화하는 경우 인젝터의 유량계수(${\alpha}$)를 계측하였다. cavitation number ($K_c$)에 대한 ${\alpha}$ 변화 특성을 확인한 결과 ${\alpha}$ 변동 특성이 오리피스 직경과 스월러 형상에 모두 영향을 받았고, 비등에 의한 연료분사 특성을 스월러 유로와 오리피스 유로 면적비인 AR과 관련지어 살펴 본 결과에서는 AR이 커질수록 비등 영향은 더 지연되고 비등의 영향이 미치기 시작하면 ${\alpha}$ 감소 기울기는 더 큰 것으로 확인되었다.

Keywords

References

  1. Edwards, T., "Liquid Fuels and Propellants for Aerospace Propulsion: 1903-2003," Journal of Propulsion and Power, Vol. 19, No. 6, pp. 1089-1107, 2003. https://doi.org/10.2514/2.6946
  2. Van Wie, D.M., D'Alessio, S.M. and White M.E., "Hypersonic Air-breathing Propulsion," Johns Hopkins APL Technology Digest, Vol. 26, No. 4, pp. 430-437, 2005.
  3. Lee, H.J., Park, J., Kwon, M., and Hwang, K.Y., "Study on a Conceptual Design Process of Fuel Supply Systems for High-Speed Vehicles," 2012 KSASS Fall Conference, pp. 2345-2351, 2012.
  4. Soteriou, C., Andrews, R., and Smith, M., "Direct Injection Diesel Sprays and the Effect of Cavitation and Dydraulic Flip on Atomization," 1995 SAE International Congress and Exhibition, Detroit, Michigan, Paper No. 950080, 1995.
  5. Coordinating Research Council, Handbook of Aviation Fuel Properties, 3rd ed., CRC Report No. 635, 2004.
  6. Lee, H.J., Choi, H., Kim, I., Hwang, K.Y., and Min, S.K., "Injection Characteristics through Orifice Injectors at High Fuel Temperature Conditions," 2013 SASE Spring Conference, pp. 1-6, 2013.
  7. White, F.M., Fluid Mechanics, 2nd ed., McGraw Hill, 1986.
  8. Nurick, W.H., "Orifice Cavitation and Its Effect on Spray Mixing," Transactions of the ASME Journal of Fluids Engineering, December, pp. 681-687, 1976.
  9. Cooper, M. and Shepherd, J.E., "Thermal and Catalytic Cracking of JP-10 for Pulse Detonation Engine Applications," GALCIT Report FM 2002.002, Caltech, December, 2002.
  10. Kim, I., Lee, H.J., Choi, H., and Hwang, K.Y., "A Study on the Effect of Fuel Boiling on Injection Characteristics through Orifice Injectors," 2013 KSPE Spring Conference, pp. 795-801, 2013.

Cited by

  1. A Study on the Effect of Fuel Boiling Point on Injection Characteristics at High Fuel Temperature Conditions vol.18, pp.2, 2014, https://doi.org/10.6108/KSPE.2014.18.2.042