Hydrodynamic Analysis of the Flow in an Axial Rotor and Impeller for Large Storage Pump

Bosioc, Alin; Muntean, Sebastian; Drăghici, Ionel; Anton, Liviu Eugen

doi:10.1088/1755-1315/49/3/032016

Cited by 5 publications

(3 citation statements)

References 2 publications

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“…In order to determine how pressure fluctuations in an axial flow pump system are impacted by vortices, (Song et al 2018) used CFD analysis. (Bosioc et al 2016) investigated the axial flow storage pump by conducting experiments using a stainless steel rig with two different tanks the hydrodynamic flow. The inlet and outlet tube diameters were 0.1 m and 0.08 m, respectively, and the gauge transducer pressure was measured between -1 and +2.5 bars at the inlet and between 0 and 6 bars at the outlet.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Turbulence Flow Field and Pressure Pulsation in 3D Impeller Axial Pump Based on Inner Dynamic Simulation and Vibration Technique Analyses

Al-Obaidi,

Alhamid

2024

Preprint

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The axial pump's big flow and low head features make it a popular choice for pumping station installationsThe purpose of this study is to determine how transiently changing flow circumstances affect the relative flow channel between the impeller and the flow field, thereby affecting pulsation. Through the use of physical model testing, the reliability of both experimental and numerical simulations of the device's flow channel was verified. The analysis conducted in the study focused on investigating the flow field and pressure pulsation characteristics of the impeller across different flow rates, while also exploring the impact of blade angle (-3°, 0°, and 3°) under five distinct operational conditions, ranging from optimal to flow conditions at best efficiency point (QBEP) plus value. According to the study, the axial pump's flow stability declined with decreasing flow rate, which resulted in increased pressure pulsations across various flow regions. Additionally, Most flow regions were affected by an increase in flow instability, levels of the pressure pulsation, and frequencies of the dominant rotor-stator interaction when the blade angle was increased from -3° to 3°. As a result of these findings, it may be possible to optimize axial flow pump device designs and enhance their stability. Furthermore, they are helpful for researchers and engineers interested in improving their understanding of pump flow dynamics.

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Section: Introductionmentioning

confidence: 99%

Investigation of Turbulence Flow Field and Pressure Pulsation in 3D Impeller Axial Pump Based on Inner Dynamic Simulation and Vibration Technique Analyses

Al-Obaidi,

Alhamid

2024

Preprint

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“…9 At this time, the axial flow impeller will work under the pump condition. 10 Axial flow impellers are used in Kaplan turbine and axial flow pump. The research on axial flow impeller has always been the focus of scholars' attention.…”

Section: Introductionmentioning

confidence: 99%

Influence of tip clearance inclination on the performance of axial flow impeller in storage mode

Zhu

Jin

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part A:

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Tidal energy is one of the most mature energy sources used in all kinds of ocean energy. Axial flow impeller plays a key role in converting potential energy and kinetic energy of seawater into electric energy. In this study, aiming at the problem of three different clearance inclination in axial flow impeller, the axial flow impeller is studied by numerical simulation and experimental verification. The results show that the efficiency first decreases rapidly, then fluctuates within a certain range, and then decreases rapidly as the inclination changes from negative to positive. When the positive inclination is larger, the axial force and radial force are smaller. Meanwhile, the length of the clearance leakage vortex and the included angle with the axial direction are smaller. This paper provides a reference for improving the utilization efficiency of tidal energy. It also has guiding significance for the design of axial flow impeller.

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“…Song et al [9] analysed the impact of vortex on pressure fluctuation in the system of axial pump using CFD analysis. Bosioc et al [10] analysed hydrodynamic flow within axial large storage pump. They manufactured the experimental rig using stainless steel and used with two different tanks, diameters of outlet and inlet tubes were 0.08 and 0.1 m. Gauge transducer pressure at the inlet was able to measure between -1 to +2.5 bars and the outlet was range between 0 to 6 bar.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigations of Transient Flow Characteristic in Axial Flow Pump and Pressure Fluctuation Analysis Based on the CFD Technique

Al‐Obaidi¹,

Iraq²,

Mohammed³

2019

JESTR

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The technique of Computational fluid dynamics was applied to investigate flow field analysis including static pressure, axial, radial and tangintial velocities vectors as well as fluctuations of pressure analyses in axial pump. Pressure fluctuations are the core causes increase noise level and vibration. For studying pressure mechanism fluctuation in pump changed monitoring rotating points are stalled at an impeller blade. Standard k-epsilon turbulence model and sliding mesh technique are adopted by using CFD. The numerical investagation found that pressure in an axial flow pump rises near inlet impeller region to outer part. Higher value of pressure was take place at impeller outlet region. Also, the computational analysis noted that the when a pump functions in larger mass flow, the area of high-pressure in impeller outlet decreases. Moreover, under low flow rate (5 l/min) in middle surface the high-speed area appears near or closed blade and blade tip region for all velocities under investigations. Furthermore. fluctuations of pressure for different point under different flows has four valleys and peaks the similar number of axial impeller passages blades. The results foun that there are two imprtant regions the first one ispositive and second one is negative pressures, this happends owing to this negative pressure area has lower pressure value. Therefore, due to the decline in the water pressure in this area may cause cavitation.

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Hydrodynamic Analysis of the Flow in an Axial Rotor and Impeller for Large Storage Pump

Cited by 5 publications

References 2 publications

Investigation of Turbulence Flow Field and Pressure Pulsation in 3D Impeller Axial Pump Based on Inner Dynamic Simulation and Vibration Technique Analyses

Investigation of Turbulence Flow Field and Pressure Pulsation in 3D Impeller Axial Pump Based on Inner Dynamic Simulation and Vibration Technique Analyses

Influence of tip clearance inclination on the performance of axial flow impeller in storage mode

Numerical Investigations of Transient Flow Characteristic in Axial Flow Pump and Pressure Fluctuation Analysis Based on the CFD Technique

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