抄録
An experimental investigation is conducted in order to determine the discharge coefficients for a water jet discharged into the surrounding air from a standard orifice located on the side wall of a square duct. Six different orifice diameters are tested. Experiments are made for a wide range of Reynolds and Weber numbers, and an empirical equation is obtained for the discharge coefficients, which reproduces the experimental results accurately. The efflux angle is deduced from the momentum theorem which takes into account the loss coefficients in the duct due to dividing flow, and it agrees well with the measurements.
