Mixing Characteristics of Liquid Phase in an Unbaffled Vessel Agitated by Unsteadily Forward-Reverse Rotating Multiple Impellers

Autor: Yoshida, Masanori, Taguchi, Yoji, Yamagiwa, Kazuaki, Ohkawa, Akira, Abe, Masahiko, Tezura, Shuichi, Shimazaki, Masuo
Jazyk: angličtina
Rok vydání: 2004
Předmět:
Zdroj: Latin American applied research. 34(1):35-40
ISSN: 0327-0793
Popis: Mixing characteristics of liquid phase in an unbaffled vessel containing water with a liquid height-to-diameter ratio of 2 agitated by unsteadily forward-reverse rotating multiple impellers, a cross type of impellers with four delta blades (CDs), were experimentally studied in comparison with that in a baffled vessel agitated by steadily unidirectionally rotating disk turbine impellers with six flat blades (DTs). For the forward-reverse as well as unidirectional modes of operation, the mixing time in multiple impeller system was larger than that in single impeller system with a liquid height-to-diameter ratio of 1. The ratio of mixing time in multiple impeller system to that in single impeller system was small for the forward-reverse agitation mode compared with that for the unidirectional agitation mode. The result was discussed in relation to the difference in bulk flow pattern between the unbaffled vessel with forward-reverse rotating CDs and the baffled vessel with unidirectionally rotating DTs.
Databáze: OpenAIRE