Experimental and numerical investigation on the influence of the clocking position on hydraulic performance of a centrifugal pump with guide vane

Chen Diyi, Jiang Wei, Yuchuan Wang, Li Ting
2018 Journal of Vibroengineering  
The investigation of the clocking effect mainly concentrates on turbines and compressors, but seldom in centrifugal pumps. In this paper, using numerical simulation and experiment, the influence of the clocking effect on the hydraulic performance of centrifugal pump with guide vane is studied. Numerical simulations with SST -turbulence model were applied to obtain the inner flow field of the test pump. The numerical simulations coincide with the test result, which indicates the accurate of the
more » ... he accurate of the utilized numerical approach. The results show the clocking positions have an important effect on hydraulic performance of the centrifugal pump with guide vane. The pump demonstrates the higher efficiency and head as the tongue locate between two guide vanes. The hydraulic performance of the volute is a major factor impacting the performance of the centrifugal pump with different clocking positions. However, the clocking position has almost no effect on the performances of the impeller and diffuser. When the guide vane is close to the volute tongue, flow field of volute is more non-uniform, and the energy loss in volute appears to be larger. The results and the method of this paper can provide theoretical reference for the design and installation of guide vane in centrifugal pump. Nomenclature Head [m] The flow rate[m 3 /h] The number of blades The rotating speed[rpm] The medium density [kg/m 3 ] The pump efficiency [%] The installation angle of the diffuser vane[o] ̅ The average static pressure [Pa] The periodic pressure component, = ( − ̅ )⁄ The outlet width of the impeller [mm] The inlet width of the diffuser [mm] The outlet width of the diffuser [mm] The inlet width of the volute [mm] The outlet diameter of the impeller [mm] The inlet diameter of the diffuser [mm] The outlet diameter of the diffuser [mm] The inlet diameter of the volute [mm] Specific speed [rpm, m 3 /s, m] 2938. The energy loss[m] The transient area weighted average total pressure for the diffuser or volute [Pa] The transient area weighted average total pressure for the diffuser or volute [Pa] The transient area weighted average total pressure at the outlet under the absolute coordinate system for impeller [Pa] The transient area weighted average total pressure at the inlet under the absolute coordinate system for impeller [Pa] BEP Optimum operating condition The frequency at the optimum operating condition [Hz]
doi:10.21595/jve.2018.18758 fatcat:c2paxlidare2tawdgljlfvtpwa