The Effect of the Operating Point on the Pressure Fluctuations at the Blade Passage Frequency in the Volute of a Centrifugal Pump

[+] Author and Article Information
Jorge L. Parrondo-Gayo, José González-Pérez, Joaquı́n Fernández-Francos

Universidad de Oviedo, Área de Mecánica de Fluidos, Campus de Viesques, 33204 Gijón (Asturias), Spain

J. Fluids Eng 124(3), 784-790 (Aug 19, 2002) (7 pages) doi:10.1115/1.1493814 History: Received June 08, 2001; Revised March 29, 2002; Online August 19, 2002
Copyright © 2002 by ASME
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(a) Sketch of the test pump showing location of the pressure taps; (b) detail of pressure transducer mounting; (c) detail of impeller outlet (all dimensions in mm)
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Experimental test loop (all dimensions in m). Valve V5 was always closed.
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Performance curves of the pump (head and efficiency)
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Steady-static pressure distribution along the volute (front side) as a function of flow-rate
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Pressure pulsations magnitude (zero-to-peak) spectrum as a function of flow-rate for positions φ=−10 and φ=20 deg (position R in Fig. 1)
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Normalized amplitude (zero to peak) of pressure fluctuation (blade passage frequency) at position R(φ=20 deg) as a function of flow rate for different pump rotational speeds
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Normalized amplitude (zero-to-peak) of pressure fluctuation (blade passage frequency) along the volute as a function of flow-rate
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Time history of the pressure coefficient distribution along the volute (blade passage frequency component) between the passage of two blades, for several flow-rates
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Comparison of the experimental and theoretical amplitude (zero-to-peak) of the pressure fluctuations coefficient at the blade passage frequency for several flow rates




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