연료노즐 내부유동 현상의 수치해석

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구자예;박장혁;오두석;정홍철
Gu, Ja-Ye;Park, Jang-Hyeok;O, Du-Seok;Jeong, Hong-Cheol

  • 발행 : 1996.06.01

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.

키워드

노즐내부유동;난류강도;케비테이션

참고문헌

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