Abstract
This paper describes experimental work on scale models of the intakes to gas circulators for gas-cooled reactors. One model was of a geometry suitable for the older type of reactor in which the boilers were outside the main pressure vessel while the other was associated with the more recent concrete pressure vessel concept.
In both models the flow was through a complex annular bend into the blade annulus in which the flow distribution was measured. In one case the bend was axisymmetric and turned the flow through 180° from one annulus into a concentric inner one. In the other model the geometry was much more complex with flow from a near hemispherical chamber being diverted into the blade annulus by a bend of more than 90° at the top of the intake and 180° at the bottom.
The tests showed that the original design of the first model gave a satisfactory performance but the other model required considerable development work.
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