Resumen

YOSHIDA, Masanori et al. Effect of impeller clearance on power consumption of unsteadily forward-reverse rotating multiple impellers in an unbaffled agitation vessel. Lat. Am. appl. res. [online]. 2002, vol.32, n.2, pp.189-194. ISSN 0327-0793.

Power consumption of unsteadily forward-reverse rotating multiple impellers, a new cross type of impellers with four delta blades (CDs), was experimentally studied in an unbaffled agitation vessel containing water with a liquid heigh t-to-diameter ratio of 2. The effect of clearance on the power number of forward-reverse rotating double and triple CDs was compared with that of udidinationally rotating disk turbine impellers with six flat blades (Dls) in the baffled vesseL The result was discussed in relation to the difference in bulk flow pattern between the unbaffled vessel with CDs and the baffled vessel with Dls, The study also revealed that the value of power consumption for the forward-reverse rotating multiple CDs in the unbaffled vessel can be evaluated as the value for the single CD system multiplied by the number of impeller stages over a wide range of impeller clearances.

Palabras clave : Power Consumption; Unbaffled Agitation Vessel; Unsteadily Forward-Reverse Rotating Impellers; Multiple Impeller System; Impeller Clearance.

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