@article{oai:ynu.repo.nii.ac.jp:00003797,
 author = {Kagawa, Shusaku and Kurokawa, Junichi and Matsui, Jun and Choi, Young-do},
 issue = {1},
 journal = {Journal of Fluid Science and Technology},
 month = {},
 note = {application/pdf, Efficiency of a centrifugal pump is known to drop rapidly with a decrease of specific speed ns in the range of ns ≦ 100 [m,m3/min,min-1]. However, below ns = 60, the pump efficiency is not yet clear, and the spiral angle of a volute casing becomes too small to manufacture. To solve this problem, a circular casing is considered appropriate in the very low ns range. The present study is aimed to reveal the relation between pump efficiency and a specific speed in the range of ns ≦ 60, when a circular casing is used. The results show that a circular casing gives higher efficiency than a spiral casing, and that radial thrust is considerably small in both casings compared with that of ordinary specific speed pump.},
 pages = {130--138},
 title = {Performance of Very Low Specific Speed Centrifugal Pumps with Circular Casing},
 volume = {2},
 year = {2007}
}