Total Pressure around Chute Blocks of SAF Stilling Basins

Induced total pressure by flow, including mean and fluctuating components, around a selected chute blockin SAF stilling basins downstream of an ogee spillway was studied. Several pressure holes were selected on variousfaces of a selected chute block to get enough information regarding the total pressure field. This paper reports theresults of an experimental work and measurement of mean and fluctuation pressures around chute blocks of SAFstilling basins. The observations showed that the maximum total pressure varies inversely with Froude number ofincoming flow while its position of occurrence follows a quadratic polynomial relationship. Statistical analysis alsoshowed that the peak instantaneous pressure fluctuations could be as large as ±4.5times the RMS value.It is concludedthat pressure fluctuation around the chute blocks may double the magnitude of pressure field around the chute blocksand can not be overlooked in designing such appurtenances.