Turbulence parameters in a stirred tank

Mean and fluctuating radial velocities have been measured in the inipeller stream of a baffled, turbine‐agitated cylindrical tank. Auto‐correlation functions, energy spectra and amplitude probabilitv density functions of the radial velocity fluctuations were also obtained. In the vicinity of the impeller, the motion is distinctly periodic, with a time scale corresponding to n b N/60, where n b is the number of turbine blades and N is the rpm. The amplitude of the periodic component was found to decrease with radial distance from the inipeller tip and was used to correct the measured turbulence intensities.