Theoretical derivation and numerical simulation of instantaneous flow rate for pillar pump
1.Research Center of Fluid Machinery Engineering and Technology， Jiangsu University， Zhenjiang， Jiangsu 212013， China; 2.School of Energy and Power Engineering， Beihang University, Beijing 100000, China
Abstract：In order to investigate the characteristic of instantaneous flow rate of pillar pump, the calculating model was proposed to deduce the formulation of instantaneous flow rate. Based on shear stress transport turbulent (k-ε) model, the numerical simulation of the transient flow field of pillar pump was performed by dynamic mesh method and user defined function. The results show that the pulsation is periodic in the instantaneous flow rate of pillar pump, and the theoretical derivation is consistent with the numerical simulation with a period irregular vibration in every cycle in the numerical simulation. For the hysteresis of outlet position, a closed volume is generated with rapid increasing of pressure. The vibration of the pressure is generated by the abrupt increasing of pressure in valve plate. Beside the parameters of the pump, the corner of port plate is an important influencing factor on the instantaneous flow rate of pillar pump.
2014, Vol. 35 
