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

  • 제20권6호
  • /
  • Pages.1971-1982
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  • 1996
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  • 1226-4881(pISSN)
  • /
  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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연료노즐 내부유동 현상의 수치해석

Calculation of the internal flow in a fuel nozzle

  • 구자예 (한국항공대학교 항공기계공학과) ;
  • 박장혁 (대우 고등기술연구원) ;
  • 오두석 (한국항공대학교 대학원) ;
  • 정홍철 (한국항공대학교 항공우주공학과)
  • 발행 : 1996.06.01
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초록

The breakup of liquid jet is the result of competing, unstable hydrodynamic forces acting on the liquid jet as it exit the nozzle. The nozzle geometry and up-stream injection conditions affect the characteristics of flow inside the nozzle, such as turbulence and cavitation bubbles. A set of calculation of the internal flow in a single hole type nozzle were performed using a two dimensional flow simulation under different nozzle geometry and up-stream flow conditions. The calculation showed that the turbulent intensity and discharge coefficient are related to needle position. The diesel nozzle with sharp inlet under actual engine condition has possibility of cavitation, but round inlet nozzle has no possibility of cavitation.

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참고문헌

  1. SAE paper 740715 Fuel Droplet Size Distribution in Diesel Combustion Chanber Hiroyasu, H;Kadota, T.
  2. SAE paper 790494 On the Dependence of Spray Angle and Other Spray Parameters on Nozzle Design and Operating Conditions Reitz, R. D;Bracco, F. B
  3. Ph.D. Thesis, Department of Mechanical and Aerospace Engineering Atomizing Round Jets Wu, K-J
  4. ILASS America 92 Mechanism of Air-Assisted Liquid Atomization Liu, A. B;Reitz, R. D
  5. ILASS America 91 Atomization Mechanism of Fuel Injection Huh, K. Y.;Gosman, A. D.
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  7. International Journal of Turbo and Jet Engine v.6 Influencyof Gas-Injector Geometry on Atomization Performance of Aerated-liquid Nozzles Wang, X. F.;Chin, J. S.;Lefebvre, A. H
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  10. ICLASS-91 A Few Useful Relations for Cavitation Orifices Ruiz, F.
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