Abstract
An experimental investigation on effect of end sill on the performance of stilling basin models for a non circular pipe outlet has been presented in this research paper. New physical models for non circular pipe outlet stilling basin have been developed in the laboratory. These newly models were tested in the laboratory for three Froude numbers namely Fr = 1.85, 2.85 and 3.85. The new models are developed by changing the geometry of end sill of same height while keeping the other configuration of stilling basin geometry same. Total twenty one test runs of one hour duration each were performed. The performance of the models was compared by performance number (PN) to evaluate the performance. The study indicated that, for the given Froude number range, the triangular end sill of height 1d with width 1d (slope 1V:1H), is performing better in comparison to other shapes of the end sill for the given flow conditions. The study also confirmed that there is a significant effect of the shape of the end sill geometry on the performance of the stilling basin models.
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