Prediction method of impeller performance and analysis of loss mechanism for mixed-flow pump

A loss model for the mixed-flow pump impellers was developed by summarizing a variety of loss calculation formulas systematically. The internal flow field of the impeller was obtained by employing the iterative calculation for S1 and S2 stream surfaces to solve the continuity and motion equations of fluid. Based on the calculation method of the flow field and the loss model, it is achieved to predict the impeller performance of the mixed-flow pump and the performance curves of a mixed-flow pump model with adjustable blades. Compared with the test data, the loss model of the mixed-flow pump based on the iterative calculation can predict the impeller performance quickly and accurately, which has a high value on the engineering applications. Based on the test verification, curves of various kinds of losses varied for the flow rate were analyzed under different blade angles. In addition, the mechanisms of various kinds of losses inside the mixed-flow pump impeller were discussed in-depth.

[1]  B. Neumann,et al.  The Interaction Between Geometry and Performance of a Centrifugal Pump , 2005 .

[2]  Robert C. Dean,et al.  Losses in Vaneless Diffusers of Centrifugal Compressors and Pumps: Analysis, Experiment, and Design , 1966 .

[3]  H W Oh,et al.  An optimum set of loss models for performance prediction of centrifugal compressors , 1997 .

[4]  M. K. Chung,et al.  Optimum values of design variables versus specific speed for centrifugal pumps , 1999 .

[5]  F. C. Schwenk,et al.  Diffusion factor for estimating losses and limiting blade loadings in axial-flow-compressor blade elements , 1953 .

[6]  Chung-Hua Wu.  A General Theory of Three-Dimensional Flow in Subsonic and Supersonic Turbomachines of Axial, Radial, and Mixed-Flow Types , 1952, Journal of Fluids Engineering.

[7]  R. H. Aungier,et al.  Mean Streamline Aerodynamic Performance Analysis of Centrifugal Compressors , 1995 .

[8]  J. E. Coppage,et al.  STUDY OF SUPERSONIC RADIAL COMPRESSORS FOR REFRIGERATION AND PRESSURIZATION SYSTEMS , 1956 .

[9]  F. J. Wiesner.  A Review of Slip Factors for Centrifugal Impellers , 1967 .

[10]  H W Oh,et al.  Hydrodynamically detailed performance analysis of a mixed-flow waterjet pump using computational fluid dynamics , 2008 .

[11]  Jin-Hyuk Kim,et al.  High-efficiency design of a mixed-flow pump , 2010 .

[12]  Michael R. Wessels,et al.  The calculation of performance maps for centrifugal compressors with vane-island diffusers , 1979 .

[13]  Mehrdad Zangeneh,et al.  Parametric Design of a Waterjet Pump by Means of Inverse Design, CFD Calculations and Experimental Analyses , 2010 .

[14]  H W Oh,et al.  Performance prediction of mixed-flow pumps , 1998 .