Studies of Orifices for Automatic Spillway Gate Controls

摘要

Design of orifice filling systems for automatic spillway gate controls requires 3-place discharge coefficients. Limited tests were made on orifices having various unusual approach and exit configurations. Where appropriate, reference is made to results of previous research, indicating that further tests were unnecessary. Effects of unusual geometry are generally negligible. Guidelines are presented for correction of coefficients when such effects should be considered. (Author)