翼列に適する翼型のキャビテーション性能 : 第2報理論第2報補遺による翼型の優秀性能

概要

論文の詳細を見る
In order to obtain new hydrofoil profiles suitable for blade elements of axial flow-turbines, pumps and ship-propellers, namely such profiles which exert excellent characteristics when arranged in a straight grate, in this report cavitation tests have been carried out on two"Cascade profiles"called N.M. 10298 and N.Y. 10198 and Clark Y 8%, both in arrangement of a straight grate. The two cascade profiles had been calculated theoretically by our method aiming at a tolerably high (value of) lift coefficient (C_a=0.9) compared with the thickness-chord ratio (8%). Clark Y 8% have been taken up, for the comparison, because it had been clarified by us to have comparatively low value of drag coefficient at the value 0.9 of lift coefficient in a single condition and also to have good characteristics under cavitation occurence (at cavitation coefficient k_d=0.8-0.4). By the experiment it has been proved that the two cascade profiles are more excellent than Clark Y 8% when arranged in a straight grate from both standpoints of the characteristics (polar diagrams) under cavitation occurence and of late incipience of cavitation.
社団法人日本機械学会の論文
1951-10-20