大形弁の損失係数について : (第2報: バタフライ弁のディスク厚, 形状の影響)

概要

論文の詳細を見る
On the former report, loss coefficients of various type valves of 200 mm bore were compared and discussed. In the case of butterfly valve, loss coefficients are mainly affected by valve bore, disc shape and disc thickness ratio for valve bore. In this report, the effects of disc thickness and disc shape on the loss coefficients for 200 mm bore butterfly valves are investigated and the effect of opening ratio on the coefficient at partial open and cavitation points are discussed. At valve full open, the coefficients increase according to the increase of disc thickness, but change is irregular by the shape effect. As per disc shape, the coefficient with spindle shape disc is 40% smaller than that with projection type disc having same thickness. At partial open, the coefficients are put in order by the opening ratio.
社団法人日本マリンエンジニアリング学会の論文