抄録
Flow visualizations of the flow pattern in several logarithmic spiral curved diffusers were caried out in order to clarify their characteristics and to improve their performances.
In this study, the effects of the difference in the logarithmic spiral angle of the curved diffuser on the flow patterns are clarified by the flow visualization with smoke wire method using High Speed Video Camera, and the diffuser performance is clarified. And, their results are compared with the pressure distributions along both diffuser walls, the velocity and vector distributions in diffuser channel.
As the results, it was found that the flow patterns obtained by the flow visualization were very useful to prove the data obtained by the wind tunnel experiment and the performance of the curved diffuser was affected considerably by the logarithmic spiral angle.
