Numerical and experimental study on the pressure fluctuation, vibration, and noise of multistage pump with radial diffuser

Multistage pump can provide high-pressure liquid, which is widely used in various areas of national economy. In order to improve the stability and reduce the noise of multistage pump, the relationships among the pressure fluctuation, vibration, and noise were studied deeply by using computational fluid dynamics and experimental measurement. Based on the unsteady numerical calculation, the phase of the pressure fluctuation wave in the middle section of the impeller and the diffuser was obtained, and the unsteady velocity distribution was acquired in the rotor–stator interaction (RSI) region between the rotational impeller and the stationary diffuser. Moreover, the vibration and noise tests of a five-stage pump with radial diffuser were performed. The results show that the phase distribution of the pressure fluctuation wave in the impeller and diffuser can be divided into four regions: the impeller flow channel region, the impeller transition region, the diffuser transition region, and the diffuser flow channel region. In addition, the pressure fluctuation, vibration and noise of the multistage pump are strongly related to each other, that is, RSI induces strong unsteady flow and pressure fluctuation in the pump, which makes the pump produce serious vibration and cause the corresponding noise. The key to controlling the vibration and noise is to reduce the effect of RSI between the impeller and the diffuser.

[1]  Hiroshi Tsukamoto,et al.  Numerical Study of Pressure Fluctuations Caused by Impeller-Diffuser Interaction in a Diffuser Pump Stage , 2001 .

[2]  Lingjiu Zhou,et al.  Numerical calculation and finite element calculation on impeller of stainless steel multistage centrifugal pump , 2014 .

[3]  Weidong Shi,et al.  Experimental study on the unsteady performance of the multistage centrifugal pump , 2018 .

[4]  Liming Dai,et al.  Bifurcation and chaotic response of a cracked rotor system with viscoelastic supports , 2007 .

[5]  Yi Li,et al.  Effect of the blade loading distribution on hydrodynamic performance of a centrifugal pump with cylindrical blades , 2018 .

[6]  P. Moin,et al.  Application of a Fractional-Step Method to Incompressible Navier-Stokes Equations , 1984 .

[7]  JIANG XIAOPING,et al.  EFECTO DEL ANCHO DE LA ENTRADA AL DIFUSOR EN BOMBA CENTRIFUGA MULIETAPA EN VOLADIZO , 2017 .

[8]  Chuan Wang,et al.  Optimal design of multistage centrifugal pump based on the combined energy loss model and computational fluid dynamics , 2017 .

[9]  Roberto Cipollone,et al.  Theoretical modeling and experimental investigations for the improvement of the mechanical efficiency in sliding vane rotary compressors , 2015 .

[10]  Hans Josef Dohmen,et al.  Unsteady flow investigation in rotor-stator interface of a radial diffuser pump , 2010 .

[11]  Mathieu Desbrun,et al.  Smoothed particles: a new paradigm for animating highly deformable bodies , 1996 .

[12]  Ling Zhou,et al.  CFD investigation and PIV validation of flow field in a compact return diffuser under strong part-load conditions , 2015 .

[13]  Kong Fanyu,et al.  Theoretical, experimental, and numerical study of special impeller used in turbine mode of centrifugal pump as turbine , 2017 .

[14]  Christopher E. Brennen,et al.  Experimental Investigation of Rotor-Stator Interaction in a Centrifugal Pump With Several Vaned Diffusers , 1989 .

[15]  Mark O. Neal,et al.  Contact‐impact by the pinball algorithm with penalty and Lagrangian methods , 1991 .

[16]  U. Bolleter,et al.  Pressure pulsations in centrifugal pumps , 1992 .

[17]  Kong Fanyu,et al.  The method for determining blade inlet angle of special impeller using in turbine mode of centrifugal pump as turbine , 2017 .

[18]  Yi Li,et al.  Entropy generation analysis for the cavitating head-drop characteristic of a centrifugal pump , 2018 .