Abstract

This paper describes the results of experimental investigation on flow behavior below vibrating sluice gate models considering different gate bottom thicknesses. The pressure and force acting on gate bottom during underflow weremeasured. Based on Eulernumber variation on gate bottom, a criteriahas beendeveloped in termsof upstream head, gate opening ratio and gate bottomthickness for identifying the three cases of flow behaviorbelow the gate as no-reattachment, stable reattachment and unstable reattachment'. Depending uponthe criteria, the pressure and force fluctuation data wereanalyzedin detailandthe analysis revealed that bothstableand unstable reattachmentgenerate self excitation of the gate and consequently increases hydrodynamic loading significantly.

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