Methods of Loss Estimation in Compressible Flow through Pipe Orifices and Nozzles
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概要
- 論文の詳細を見る
Compressibility effects on the characteristics of the flow through orifices and nozzles have been investigated, theoretically and experimentally, under the conditions of subsonic and supercritical flow regimes. A practical experimental formula is propsed by expressing the amount of loss as a ratio of loss coefficient of compressible flow case to that of incompressible flow case. The results of energy flow measurement indicate that the major part ( 60-70% ) of the total dissipation energy arises within one-pipe diameter downstream of orifice. In addition , by measurements of the velocity and wall pressure, it is confirmed that the maximum pressure recovery does occur at 2 to 3 times the pipe diameter downstream of the reattachment point, and this location corresponds to the point where the irregularity of the velocity distribution due to the existence of orifice almost disappears.
- 一般社団法人日本機械学会の論文
著者
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Maeda Toshiyuki
Department Of Mechanical Engineering Tokyo Metropolitan University
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HIRAYAMA Naomichi
Department of Mechanical Engineering, Tokyo Metropolitan University
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TORIZUMI Yasuhiro
Graduate Student, Tokyo Metropolitan University
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Hirayama Naomichi
Department Of Mechanical Engineering Faculty Of Technology Tokyo Metropolitan University
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Maeda Toshiyuki
Department Of Cardiovascular Surgery Sapporo City General Hospital
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