Steam turbine blading

The paper is a review of the present position of the subject of steam turbine blading. Section (1) describes the causes and effects of corrosion and erosion. The most important materials in use are enumerated and compared. Section (2) deals with the form of the blade passage in impulse and reaction machines, and with the energy losses occurring in the blading. Some meLhods of tapering the blades are given. Section (3) details the stresses in the blades and describes the types of blade fastenings, lacing and shrouding. Section (4) gives the methods used for obtaining a large exhaust area. Section (5) deals with vibration and its causes, and shows a method of correcting for the effect of centrifugal force. The lines on which the problem is being attacked are described. Section (6) is devoted, to the methods of manufacture by-milling and by drop forging. A bibliography is appended.