1972 Volume 5 Issue 4 Pages 355-360
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.