대한기계학회논문집B (Transactions of the Korean Society of Mechanical Engineers B)
- 제22권5호
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- Pages.661-671
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- 1998
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- 1226-4881(pISSN)
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- 2288-5324(eISSN)
DOI QR Code
벽에 충돌하는 디젤분무의 특성에 대한 수치적 연구
Numerical study for the characteristics of diesel spray impinging on a wall
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Yang, Hui-Cheon
(Yosu National University, Yosu) ;
- Jeong, Dong-Hwa ;
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Yu, Hong-Seon
- 발행 : 1998.05.01
초록
It is unavoidable that the fuel spray impinges on the wall of piston cavity in a compact high-pressure D.I. diesel engine. Therefore the characteristics of impinging spray are the very significant information on the consideration and the simulation of its combustion processes including the formation mechanism of exhaust emission and the design of the combustion chamber. In this paper, the numerical simulation was performed to study the characteristics of impinging spray. The spray-wall impingement model used is Watkins and Park's model. Calculation parameters are the inclination angles and the ambient pressures. As the inclination angle increases, the impinging spray develops mainly to the direction of the downstream and scarcely flows to that of the upstream. The shape on the wall of the impinging spray is the circle in the case of the normal impingement, while it is the ellipse in that of the oblique impingement. As the ambient pressure increases, the growth of impinging spray on the wall in the radial direction decreases owing to the increase in the resistance of the ambient.
키워드