RECIRCULATION AND TURBULENCE BY JET FLOW CONFINED IN VESSEL

[摘要] References(13)Cited-By(3)Recirculation and the turbulence characteristics by jet flow confined in vessel were studied experimentally to examine Curtet-Craya''s theory. The location of recirculation zone was first measured visually. The starting position of recirculation zone was well explained by Curtet-Craya''s theory. Measurement of turbulence characteristics in the recirculation zone was carried out by hot-wire anemometer. These results show that increase in turbulence and high anisotropy of turbulence are caused by the low-frequency turbulence newly produced in the recirculation zone. Curtet-Craya''s assumption that turbulence is isotropic seems not to be appropriate in the recirculation zone. Turbulence intensities at the position of maximum recirculation flow correlated with Curtet number.