The Numerical Simulation of Unsteady Flow in a Mixed flow Pump Guide Vane

Abstract

In order to investigate the characteristics of unsteady flow in a mixed flow pump guide vane under the small flow conditions, several indicator points in a mixed flow pump guide vane was set, the three-dimensional unsteady turbulence numerical value of the mixed flow pump which is in the whole flow field will be calculated by means of the large eddy simulation (LES), sub-grid scale model and sliding mesh technology. The experimental results suggest that the large eddy simulation can estimate the positive slope characteristic of head & capacity curve. And the calculation results show that the pressure fluctuation coefficients of the middle section in guide vane inlet will decrease firstly and then increase. In guide vane outlet, the pressure fluctuation coefficients of section will be approximately axially symmetrical distribution. The pressure fluctuation minimum of section in guide vane inlet is above the middle location of the guide vane suction surface, and the pressure fluctuation minimum of section in which located the middle and outlet of guide vane. When it is under the small flow operating condition, the eddy scale of guide vane is larger, and the pressure fluctuation of the channel in guide vane being cyclical fluctuations obviously which leads to the area of eddy expanding to the whole channel from the suction side. The middle of the guide vane suction surface of the minimum amplitude pressure fluctuation to which the vortex core of eddy scale whose direction of fluid's rotation is the same to impeller in the guide vane adhere.

Study on the pulsation and fluid-structure coupling characteristics of rotating parts of vane type mixed-flow pump

“…Ning Chao [2], Lu Jin [3], Liang Kaihong [4] and Li Tongqiao [5] utilized numerical simulation techniques to study the hydraulic characteristics of the flow field inside the pump internal impeller. Additionally, Shi Weidong [6], Yang Fan [7] and Li Yibin [8] carried out unsteady numerical simulations to obtain the pulsation characteristics of the internal impeller of MFP. Li Wei [9] and Zhou Zenghao [10] analyzed the stressstrain of the mixed-flow pump shaft rotor using both flow-solid coupling and fluid-structure coupling.…”

Optimization design of hydraulic performance in vaned mixed-flow pump

“…The long-distance blade passage of impeller-guide-vane connecting system increases the difficulty of green design. 21 A reasonable blade profile (angles) will be a compromise of fluid control and loss reduction. 22 Therefore, the design problem becomes a non-linear optimization.…”

A mixed-flow submersible well pump: design features and an investigation of performance

“…Even more, guide vane plays an important role in removing pump vibration, hydraulic excitation, and noise for a full range of operation [2][3][4][5]. Using LES method, Li et al [6] investigated the Abstract This work presents a specially designed mixedflow submersible well pump to meet the demand of high handling capacity. To simplify molding process and productivity, an axial-radial guide vane is proposed and its main hydraulic components are made of plastics.…”