The characteristics of flow structures within a centrifugal pump with and without a vaned diffuser and its relationship to unsteady pressure fluctuations and "far-field" noise is of significant interest to us. The technique of Particle Image Velocimetry in conjunction with pressure measurements is used to establish the dominating unsteady flow features both at and off design conditions. This is relevant in reduction and elimination of "sources" of noise and providing an increased operating range.

Some of the past and present work carried out in the laboratory address the following issues:

Manish Sinha and Joseph Katz, "Flow Structure and Turbulence in a Centrifugal Pump with a Vaned Diffuser" 1998 ASME Fluids Engineering Division Summer Meeting,21-25 June, Washington D.C.

Manish Sinha, Joseph Katz and Charles Meneveau, "Addressing Passage-Averaged and LES Modeling Issues in Turbomachinery Flows using two-dimensional PIV data",ASME Fluids Engineering Division Summer Meeting, 21-25 June,1998, Washington D.C

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