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Characterization of the internal flow and fuel spray from an impinging flow nozzle
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 Title & Authors
Characterization of the internal flow and fuel spray from an impinging flow nozzle
Ha, Seong-Eop; Kim, Heung-Yeol; Gu, Ja-Ye; Ryu, Gu-Yeong;
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 Abstract
The nozzle length to diameter ratio of real diesel nozzles is about 2-8 which is not long enough for a fully developed and stabilized flow. The characteristics of the flow such as turbulence at the nozzle exit which affect the development of the spray can be enhanced by impinging the flow inside nozzle. The flow details inside the impinging nozzles have been investigated both experimentally and numerically. The mean velocities, the fluctuating velocities, and discharge coefficients in the impinging inlet nozzles, round inlet nozzle, and sharp inlet nozzle were obtained at various Reynolds number. The developing feature of the external spray were photographed by still camera and the droplet sizes and velocities were also measured by laser Doppler technique. The spray angle was greater and the droplet sizes near the spray axis were smaller with the impinging flow inside nozzle.
 Keywords
Nozzle Inlet Condition;Nozzle Geometry;Flow Impingement;Turbulent Intensity;Spray;
 Language
Korean
 Cited by
1.
디젤기관용 분사밸브 형상에 따른 분사특성,김성윤;오승우;박권하;

한국마린엔지니어링학회지, 2003. vol.27. 6, pp.745-752
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