遠心羽根車の羽根間フローパターンの相違に基づく速度変動

概要

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When an open-type impeller was operated near the flow rate for shockless entry, a large component in the velocity fluctuation spectrum was observed outside the impeller. The frequency of this component was equal to that of the impeller rotation. The origin of this component was studied experimentally. The flow conditions near the flow rate where the large component was observed were determined for an open impeller and for a closed impeller. From the experiment, it became clear that the flow pattern including a back flow region in the open impeller was changed near the above mentioned flow rate, and at that particular flow rate, two types of velocity distributions existed in the impeller channels. Thus, the large component of the velocity fluctuation was observed outside the impeller. In this paper, the flow pattern which caused the velocity fluctuation is discussed.
一般社団法人日本機械学会の論文
1993-05-25