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3‐D hydrodynamics generated in a stirred vessel by a multiple‐propeller system
Author(s) -
Baudou C.,
Xuereb C.,
Bertrand J.
Publication year - 1997
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450750402
Subject(s) - propeller , dimensionless quantity , plane (geometry) , mechanics , dissipation , position (finance) , flow (mathematics) , flow visualization , marine engineering , physics , geometry , mathematics , engineering , thermodynamics , finance , economics
The aim of this study is to optimize the position and the number of propellers in a non‐standard tall vessel. Laser sheet flow visualization experiments were carried out for selected geometrical arrangements which produced stable flow patterns and good transport between the propellers. Four double‐propeller arrangements corresponding to frequent industrial cases and a three‐propeller system have been chosen. Comparison of LDA measurements in the r‐z plane, dimensionless global parameters N Qp , Nt m , N p , E p and spatial distribution of local energy dissipation rate ϵ shows that a three‐propeller system is the most efficient.