Analysis of the dependence of the frequencies of cavitation self-oscillations on the supply and cavitation reserve of a centrifugal pump with a side inlet

This paper presents an analysis of cavitation-induced self-oscillations in a centrifugal vane pump with a side inlet. The study is based on experimental data characterizing the oscillation period as a function of flow rate and net positive suction head . An approximating surface is constructed, enabling the identification of zones with varying sensitivity of the period to changes in each operational parameter. A partial differential equation, derived using the Sparse Identification of Nonlinear Dynamics (SINDy) method, models the underlying system dynamics. The analysis further includes the construction of gradient maps to delineate zones of synergistic and antagonistic parameter influence, as well as a curvature map based on the eigenvalues of the Hessian matrix. The results provide a foundation for predicting and optimizing pump operating regimes to mitigate cavitation oscillations. Furthermore, the findings offer insights for adapting the flow paths in BB3-type vane pumps operating under inlet vacuum conditions and in regimes characterized by a flow rate below the optimal operating point. The analysis yields new perspectives on the mechanisms governing cavitation self-oscillations.
EDN: QFDWCH, https://elibrary/qfdwch

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