Power consumption in a baffled agitated vessel with pitched wire-gauze blade impeller is measured over a wide range of Reynolds number in turbulent now region, where the power consumption decreases with decreasing the wire-gauze blade angle. The power consumption without aeration is well correlated with the baffled condition parameter (Bw/D)n(b)(0-8). The rotational speed to occur the gross circulation of gas N-R increased with the decrease of a blade angle theta for the upflow condition. In the operating conditions of the gross circulation flow of the gas back into the impeller (N > N.) and the turbulent flow (Red > 200), the power consumption under aeration at the standard baffled condition Np-g is correlated with the modified equation by the blade angle theta, which was reduced to the power correlation for the wire-gauze impeller (theta = pi/2). In the range of the rotational speed of N > N-R the power number under aeration is almost independent of the impeller position and the liquid flow direction through the impeller.
The measured gas-liquid mass transfer volumetric coefficient for the pitched wire-gauze blade impeller k(1)a coincides well with the correlation of k(1)a for the wire-gauze impeller in lower viscosity liquid, whereas the former is smaller than the latter in higher viscosity liquid because of the lost of the wire-gauze blade effect.