Abstract
Experimental conditions of bubbling jets were chosen in the intermediate gas flow rate regime where the size and the shape of bubbles are mainly determined by nozzle size and gas flow rate. The velocity and the turbulence intensity of liquid in bubbling jets were measured by making use of LDV (Laser Doppler Velocimeter). The radial and axial distributions of them were related to the behaviour of rising bubbles. The empirical expressions for the velocity and turbulence intensity on the center-line were presented as functions of gas flow rate. Also water jets in the same vessel were measured to confirm the applicability of LDV system and to clarify the effect of side wall on the confined jets.
