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- 저자 : ( Takuro Onodera ) (검색결과 1 건)
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Cavitating Flow in Rectangular Nozzle with Orifice
( Takao Inamura ),( Hidenori Saito ),( Masatoshi Daikoku ),( Takuro Onodera ),( Hiroshi Sakamoto ),( Akinaga Kumakawa ) 한국액체미립화학회 2005 한국액체미립화학회 학술강연회 논문집 Vol.2005 No.-
The experimental investigations of the cavitating flow in a rectangular nozzle with a orifice were conducted to make clear the relationship between a cavitating flow pattern and liquid injection conditions. The liquid injection pressure, chamber pressure were varied over the wide range. The cavitation number decreases as the Reynolds number increases. The effect of a jet Reynolds number on the cavitating flow pattern is small under the present experimental conditions. The magnitude of the acceleration of a nozzle is relating with the cavitating flow patterns. When the cavitating flow pattern changes from the smooth flow to the cloud and sheet cavitation flows, the root mean square value of the acceleration of a nozzle increases rapidly. And as the flow pattern changes from the cavitation flow to the hydraulic flow, the root mean square value decreases rapidly. These experimental results show that the cavitating flow pattern greatly affects the oscillation of a nozzle, that is the atomization instability. The reattachment of the liquid flow that detaches at the exit of an orifice makes the turbulences in the liquid flow. It is clear that these turbulences improve the atomization of a liquid jet issued from the nozzle exit.
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