Abstract
The first part of this paper is concerned with the many problems that are encountered during the production of a design for a set of steam-turbine main-propulsion machinery, and it shows the type of compromises that have to be made in all cases. Some of the most important features that have to be carefully considered in this respect, are detailed under their respective headings.
Effects upon turbine efficiency, weight and space of various design features, such as speed, number and type of stages, are described, and reasons given for the adoption of various turbine configurations in relation to service requirements. Examples are provided which show the advances made respecting performance, weight and space.
The second part of the paper is concerned with turbine operation, and suggests the most suitable manner in which this may be achieved in order to safeguard the turbines, to ensure reliability and preserve the original performance figures.
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