ENERGY LOSSES AT THREE-WAY CIRCULAR DROP MANHOLES WITH TWO OPPOSED INFLOW PIPES HAVING DIFFERENT DIAMETER

Abstract

 Authors have already formulated energy loss coefficients of the three-way circular drop manholes in consideration of six dimensionless variables for structural elements of pipes and manhole, and hydraulic parameters. However, any calculation formula of the energy loss for drops between two opposed inflow pipes and an outlet pipe has not existed yet. In this study, the energy loss for a three-way circular manhole with drops between two opposed inflow pipes having different diameter and an outlet pipe was examined. From the experimental results, the influence that drops between the inflow pipes and the outflow pipe and the water flow velocity of an inflow pipe gave, to the pressure head of another inflow pipe was clarified.