Effect of the collector tube profile on Pitot pump performances

The pitot pump is composed of the rotating casing with the impeller channel and the pitot tube type collector as the discharge line. The radial impeller feeds water to the rotating casing. The water rotating together with the casing is caught by the stationary pitot tube type collector, and then dis...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2013-01, Vol.52 (3), p.32021-6
Main Authors: Komaki, K, Kanemoto, T, Sagara, K, Umekage, T
Format: Article
Language:English
Subjects:
Accumulators
Casing (material)
Collectors
Computational fluid dynamics
Discharge
Drag
Feed systems
Fluid flow
Impellers
Internal flow
Pitot tubes
Pumps
Rotating
Rotation
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Summary:The pitot pump is composed of the rotating casing with the impeller channel and the pitot tube type collector as the discharge line. The radial impeller feeds water to the rotating casing. The water rotating together with the casing is caught by the stationary pitot tube type collector, and then discharges to the outside. This type pump, as the extra high head pump, is provided mainly for boiler feed systems, and has been designed by trial and error. To optimize the pump profiles, it is desirable to investigate not only performances but also internal flow conditions. This paper discusses experimentally and numerically the relation between the pump performances and the flow conditions in the rotating casing. The moderately larger dimensions of the collector make the pump head and the discharge high with the higher hydraulic efficiency. The flow in the casing is almost the forced vortex type whose velocity is in proportion to the radius but the core velocity is affected with the drag force of the stationary collector. Based upon the above results, the profile of the pitot tube type collector was optimized with the numerical simulation.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/52/3/032021