Abstract
Turbulence measurements in open-channel flows with adverse-pressure gradients were conducted by making use of a laser Doppler anemometer(LDA). Hydrogen-Bubble technique was also used to measure the spanwise spacing scales of the bursting phenomenon. It was found that the bursting period normalized by the outer variables decreases with an increase of the adverse pressure gradient and also that the spanwise spacing scales normalized by the inner variables decreases with an increase of it. The contribution rates of the sweep event increases in comparison with those of the ejection event at near half depth.
