軸流プロペラ水車の設計に就て

概要

論文の詳細を見る
This paper proposes a somewhat new method for determination of the chief dimensions of an axial flow water turbine of propeller type, except the runner itself, which is to be designed under a given condition. Its characteristic features are : (1) the introduction of an index number λ which represents the characteristics of the guide apparatus into the ordinary design formulae, (2) provision of diagrams which may enable turbine designers to select some numerical coefficients with special reference to the cavitation phenomena and the hydraulic efficiency of the runner. Several equations, given in this paper, show the relations between the index number λ, above mentioned, the specific speed coefficient σ, the axial velocity coefficient k_〓, the cavitation index μand the hydraulic efficiency of the runner ηR respectively. These equations will be of some use for a designer when he wishes to design a new propeller turbine of this type. At the end of this paper, a few experimental results regarding to the character of the index λ and a numerical example of a turbine design referring to this method are also given.
一般社団法人日本機械学会の論文
1929-11-18