Criteria for dynamic flow behavior below the vibrating sluice gates

Abstract EN

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 were measured.

Based on Euler number variation on gate bottom, a criteria has been developed in terms of upstream head, gate opening ratio and gate bottom thickness for identifying the three cases of flow behavior below the gate as no-reattachment, stable reattachment and unstable reattachment.

Depending upon the criteria, the pressure and force fluctuation data were ana- lyzed in detail and the analysis revealed that both stable and unstable reattach- ment generate self excitation of the gate and consequently increases hydrody- namic loading significantly.