Abstract

One of the problems which arose during the design of an experimental air turbine was the design of a suitable inlet volute. It was considered that to obtain reliable flow measurements within the turbine without laboriously traversing around the complete turbine annulus, a smooth, evenly distributed flow at inlet was imperative. An analytical approach was considered in the first instance, but the problem appeared so complex that it was decided to perform a purely experimental investigation. This paper outlines the reasons for selecting a particular type of volute for the purpose, and describes the initial design, aerodynamic tests on a quarter-scale model, and the subsequent modifications which led to a final design of volute.

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