1418 多ノズルを用いた高流量比ジェットポンプ特性

概要

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As the result of flow analytical studies of the high flow-ratio Jet Pump using a five-nozzle, the number of nozzles and the diffuser configuration were selected as the parameter that affected Jet Pump efficiency. The experimental studied were performed for four types of nozzle from a single to seven nozzles at best-efficient-point flow-ratio of about 7 and for two added diffuser configurations called as a "trumpet" type and a "bell" type using a five nozzle. And the efficiency data were obtained experimentally under room temperature conditions. Increasing the number of nozzles enhanced the Jet Pump efficiency. However, it was to five that efficiency improved and in case of seven nozzles, efficiency decreased conversely. The diffuser configuration was the most efficient at a conventional conical diffuser, and a "trumpet" type or a "bell" type made efficiency decrease so that the flow-ratio was large.
社団法人日本機械学会の論文
2003-08-05