Results on overall pump head and efficiency performance, pressure pulsation high speed camera visualization of flow patterns behavior are presented for different inlet air-water void fractions at a given rotational speed. With the increase decrease rates, size bubbles tend to agglomerate in specific impeller passage locations along blade chord. The starting point breakdown is related strong inw...

Noise radiation is of importance for the performance of centrifugal pumps. Aiming at exploring noise radiation patterns of a typical centrifugal pump at different flow rates, a three-dimensional unsteady hydro/aero acoustic model with large eddy simulation (LES) closure is developed. Specifically, the Ffowcs Williams-Hawkings model (FW-H) is employed to predict noise generation by the impeller ...

In order to analyze the inner flow in a multi-stage double-suction centrifugal pump, which is regarded as common way of knowing current characteristics pump and basis optimization for better performance, numerical simulation considering velocity field distribution pressure fluctuation propagation law using detached eddy method was conducted. Additionally, principle entropy generation put use qu...

In this paper, a simulation-based method is proposed for optimal placement of vibration sensors for the purpose of fault detection in a centrifugal pump. The centrifugal pump is modeled to investigate the effect of vane tip fault on fluid flow patterns numerically. Pressure pulsations are investigated at different locations at the inner surface of the pump before and after the presence of the f...

Abstract In the design of rotary blood pumps, optimization parameters plays an essential role in enhancing hydrodynamic performance and hemocompatibility. This study investigates influence volute tongue angle as a geometric parameter on hemodynamic characteristics pump. A numerical investigation five different versions designs is carried out by utilizing computational fluid dynamics (CFD) softw...

Since the pump as turbine is increasingly employed in energy storage, improving efficiency both and modes required for economic benefits. This study aims to analyze vortex flow characteristics control methods reduce hydraulic loss. In this paper, a delayed detached eddy simulation was applied low specific speed pump-turbine. Based on entropy production analysis vorticity binary decomposition lo...

Cavitation and the corresponding induced vibration characteristics in a centrifugal pump under part load (0.4Qd, Qd is rated flow) conditions were investigated by combining numerical simulation experimental analysis to determine internal flow signals different cavitation conditions. Under conditions, initiated at inlet of blades close tongue. Expansion low-pressure region increases size vortex ...

The hydraulic and acoustic performance of centrifugal pumps are interrelated contradictory in structure design. An optimization design method a volute based on radial basis function (RBF) neural network genetic algorithm (GA) is proposed to solve this problem. efficiency total sound pressure level the pump used as objectives. diameter base circle, width installation angle tongue, height diffuse...