AbstractThe gas holdup and gas entrainment of a plunging liquid jet with a gas entrainment guide in an air‐water system was investigated. The measurement of the gas holdup was performed using an over‐flow method. The turbulent jet velocity calculated on an inside nozzle diameter in the range from 4.4‐26.5 m/s for this system has been used in our correlations. The gas holdup has been well correlated in terms of 1/H(v02+ 2gH1),H1d0and the gas entrainment in terms of 1/Hw(v02+ 2gH1),H1,d0. The jet power requirement was also obtained from experimental