Flow Characteristics and Energy Loss within the Static Impeller of Multiphase Pump

Jiang, Zhidi; Li, Haiying; Shi, Guangtai; Liu, Xiaobing

doi:10.3390/pr9061025

Cited by 7 publications

(9 citation statements)

References 18 publications

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“…As the flow in the centrifugal pump has a high Reynolds number, the numerical simulation was adapted from the standard k-ε turbulence model [23][24][25][26]. ANSYS CFX 14.5 is used for numerical calculation, the coupling of velocity and pressure adopts the SIMPLEC algorithm, and the convection term adopts high-order format [27].…”

Section: Simulation Methodsmentioning

confidence: 99%

Influence of Blade Wrap Angle on the Hydrodynamic Radial Force of Single Blade Centrifugal Pump

et al. 2021

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To investigate the effect of blade wrap angle on the hydrodynamic radial force of a single blade centrifugal pump, numerical simulation is conducted on the pumps with different blade wrap angles. The effect of the wrap angle on the external characteristics and the radial force of a single blade centrifugal pump was analyzed according to the simulation result. It is found that, with the increase of the blade wrap angle, the head and efficiency of the single blade centrifugal pump are improved, the H-Q curve becomes steeper, and the efficiency also increased gradually, while the high-efficiency area is narrowed. The blade wrap angle has a great effect on the radial force of the single blade centrifugal pump. When the blade wrap angle is less than 360°, the horizontal component of the radial force is negative and the value is reduced with the increase of the wrap angle of the blade. When the wrap angle is larger than 360°, the horizontal component of the radial force is positive and the value increases with the increase of the wrap angle. Under part-loading conditions, the radial force of the single blade pump is significantly reduced with the increase of the blade wrap angle. When the wrap angle is smaller than 360°, the radial force decreases with the flow rate increase. In the condition that the wrap angle is larger than 360°, the radial force increases with the flow rate increase.

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Section: Simulation Methodsmentioning

confidence: 99%

Influence of Blade Wrap Angle on the Hydrodynamic Radial Force of Single Blade Centrifugal Pump

et al. 2021

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“…From this, the operating point of the tunnel was estimated. To estimate the rotating speed when driving the impeller in the large cavitation tunnel, a specific speed (N S ) was first defined as in Equation (7).…”

Section: Estimation Of Dlct Performancementioning

confidence: 99%

“…Consequently, the specific speed values can be read by drawing a straight line perpendicular to the horizontal axis from the point where the two curves meet, and that point is the operating point in the flow rate. So, the rotating speed of the impeller can be calculated using Equation (7). And then the efficiency and the power coefficient can be obtained from the Figure 5.…”

Section: Estimation Of Dlct Performancementioning

confidence: 99%

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A Numerical Study on Axial Pump Performance for Large Cavitation Tunnel Operation

et al. 2021

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In this paper, a numerical investigation was carried out on the performances of a designed axial flow pump for a large cavitation tunnel. From this, the flow characteristics, force, and torque performance of the axial flow pump were investigated, and the rotating speeds of the impeller satisfying the test section speed performances required in the large cavitation tunnel were estimated. The axial flow pump was modeled such that the impeller, stator, and nacelle were located in a cylindrical tunnel. The calculations were carried out for incompressible steady-state turbulent flow considering the impeller rotating. The performance of the pump was confirmed, finding that the head gain was caused by the pressure jump downstream of the pump. The performance of the stator was confirmed to be good enough to refine the tangential flow due to the impeller rotating. To investigate the operating performance of the large cavitation tunnel, the head loss of the entire tunnel without the pump was obtained from a numerical analysis. The operating points were estimated from the specific speed–head coefficient curves, and it was found that the present numerical results were in good agreement with the experiments.

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“…Zhang et al [11] analyzed the formation process of the gas pocket in the multiphase pump through non-constant numerical simulations and visualized experiments, and the results of the study provide some guidance for the future design of multiphase pump impellers. Wang et al, Huang et al, Jiang et al, and Shi et al [12][13][14][15] studied the flow characteristics of the multiphase pump from the perspective of energy loss and obtained the influence law of structure parameters and working condition parameters on the performance of the multiphase pump. Xu et al [16] studied the internal flow pattern of a multiphase pump and developed a multiphase pump with splitting vanes.…”

Section: Introductionmentioning

confidence: 99%

A Method for the Integrated Optimal Design of Multiphase Pump Based on the Sparse Grid Model

Peng

Zhang

Chen³

et al. 2022

Processes

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Multiphase pumps are used as an important tool for natural gas hydrate extraction owing to their excellent gas–liquid mixing and transport properties. This paper proposes an adaptive response surface-based integrated optimization design method. A model pump is designed based on the axial flow pump design theory. The model pump is numerically simulated and analyzed to obtain its performance parameters. Then the structural and performance parameters of the pump are parameterized to establish a closed-loop input–output system. Based on this closed-loop system, a sensitivity analysis is performed on the structural parameters of the impeller and guide vane, and the parameters that affect the performance of the gas–liquid hybrid pump the most are derived. The Sparse Grid method was introduced to design the experiment and construct the approximate model. The structural parameters of the impeller and guide vane are used as design variables to optimize the pressure increment and efficiency of the pump. After optimization, the pressure increment of the multiphase pump was increased by 10.78 KPa and the efficiency was increased by 0.89% compared to the original model. Finally, we validate the accuracy of the optimized model with tests.

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Flow Characteristics and Energy Loss within the Static Impeller of Multiphase Pump

Cited by 7 publications

References 18 publications

Influence of Blade Wrap Angle on the Hydrodynamic Radial Force of Single Blade Centrifugal Pump

Influence of Blade Wrap Angle on the Hydrodynamic Radial Force of Single Blade Centrifugal Pump

A Numerical Study on Axial Pump Performance for Large Cavitation Tunnel Operation

A Method for the Integrated Optimal Design of Multiphase Pump Based on the Sparse Grid Model

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