Measurement of Turbulent Bubbly Flow Characteristic in a Horizontal Channel Using PTV

摘要

Experiments were performed to measure the flow structures of turbulent bubbly flow in a horizontal channel with PTV. Streamwise and spanwise components of velocities in the boundary layer were obtained using shallow focal imaging technique which enabled to visualize the motion of bubbles and tracer particles suspended in the near-wall region. Measurements results at three locations downstream a bubble injector showed that the average streamwise velocity in the vicinity of the wall was attenuated by presence of bubbles, implying the reduction of skin frictional resistance.