Vortex inhibitors

Intakes in reservoirs often suffer from problems with vortices, particularly if they are sufficiently strong to produce a stable air core. A programme of experimental research has been carried out to determine the effectiveness of a number of intake entrance configurations in reducing an incipient tendency to form vortices. Several configurations have shown promise in these tests, but sufficient work has not been done to enable an optimum geometry to be recommended. Various of the published methods for predicting threshold conditions have been examined in the light of data from these experiments, and this has highlighted the need for further data.