上流キャビテータ作用の少ない低壊食性戸溝の形状

概要

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To determine the optimal conformation of gate slots to suppress cavitation erosion, systematic experiments were carried out on the effects of the width-to-depth ratio ranging from 1 to 4 and of the offset mounted at the downstream edge of the slot on erosion: by using techniques of pressure-sensitive film and soft aluminium. Major cavitation takes place at three locations: vortex cvaitation within the shear layer spearated from the upstream edge of the slot (CAV-1), vortex cavitation within the slot (CAV-2), and attached cavitation within the shear layer separated from the downstream edge (CAV-3). "CAV-3" is directly related to the erosion around the slot. While "CAV-1" and "CAV-2" play important roles in the development of "CAV-3" as marked upstream cavitators. Finally, the suitable conformation of the slot is found to reduce the marked effects of the upstream cavitators on erosion.
一般社団法人日本機械学会の論文
1991-09-25