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http://dx.doi.org/10.6108/KSPE.2017.21.5.019

Effect of Orifice Geometry on Flow Characteristics of Liquid Jet from Single Hole Nozzle  

Song, Yoonho (School of Mechanical Engineering, Chungbuk National University)
Hwang, Donghyun (School of Mechanical Engineering, Chungbuk National University)
Ahn, Kyubok (School of Mechanical Engineering, Chungbuk National University)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.21, no.5, 2017 , pp. 19-28 More about this Journal
Abstract
Effects of cavitation and hydraulic flip in circular and elliptical nozzles on the flow characteristics have been studied. Spray tests were conducted using injectors with different ratios of an orifice length(L) to a diameter(d) and of a major axis diameter(a) to a minor axis diameter(b). With the increment of an injection pressure drop, discharge coefficients slightly decreased in cavitation flows, and those suddenly dropped and were almost constant in hydraulic flip flows. For elliptical nozzles with L/b > 8 and L/a < 8, discharge coefficients and flow patterns showed different results from those in previous circular nozzles. When a flow in the elliptical nozzle was under steady condition, as the liquid column went downstream from the nozzle, its spray angle a little decreased in the plane of a major axis and increased in the plane of a minor axis.
Keywords
Circular Nozzle; Elliptical Nozzle; Cavitation; Hydraulic Flip; Discharge Coefficient;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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