Numerical research on viscous oil flow characteristics inside the rotor cavity of rotary lobe pump

Li, Yibin; Du, Jun; Guo, Dong-Sheng

doi:10.1007/s40430-019-1781-0

Cited by 17 publications

(8 citation statements)

References 23 publications

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“…The accuracy of the CFD model was verified experimentally. Li et al 29 presented the geometric and kinematic models of the outer rotor of a rotary vane pump. To improve the performance, a new method for generating the stator curve trajectory was proposed.…”

Section: Many Researchers Have Designed New Hydraulic Pumpmentioning

confidence: 99%

Numerical simulation and experimental performance research of cylindrical vane pump

Cheng

Wang

Rehman

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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This study presents a novel cylindrical vane pump based on the traditional working principle. The efficiency of the cylindrical vane pump was verified by experimental validation and numerical analysis. Numerical analysis, such as kinematics analysis, was performed in Pro/Mechanism and unsteady flow-field analysis was performed using ANSYS FLUENT. The stator surface equations were derived using the geometric theory of the applied spatial triangulation function. A three-dimensional model of the cylindrical vane pump was established with the help of MATLAB and Pro/E. The kinematic analysis helped in developing kinematic equations for cylindrical vane pumps and proved the effectiveness of the structural design. The maximum inaccuracy error of the computational fluid dynamics (CFD) model was 5.7% compared with the experimental results, and the CFD results show that the structure of the pump was reasonable. An experimental test bench was developed, and the results were in excellent agreement with the numerical results of CFD. The experimental results show that the cylindrical vane pump satisfied the three-element design of a positive-displacement pump and the trend of changes in efficiency was the same for all types of efficiency under different operating conditions. Furthermore, the volumetric efficiency presented a nonlinear positive correlation with increased rotational velocity, the mechanical efficiency showed a nonlinear negative correlation, and the total efficiency first increased and then decreased. When the rotational velocity was 1.33[Formula: see text] and the discharge pressure was 0.68[Formula: see text], the total efficiency reached its maximum value.

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Section: Many Researchers Have Designed New Hydraulic Pumpmentioning

confidence: 99%

Numerical simulation and experimental performance research of cylindrical vane pump

Cheng

Wang

Rehman

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

show abstract

“…The pressure distribution between adjacent cavities of the gears gradually became uniform. Li et al (2018) conducted simulation calculations on three-blade pendulum pumps with nine different helical angles (0 °-60 °range).…”

Section: Introductionmentioning

confidence: 99%

Multifactor and multi-objective coupling design of hydrogen circulation pump

Zhai,

Li,

et al. 2024

Front. Energy Res.

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The hydrogen circulation pump (HCP) is an important power component of the hydrogen fuel system, used to recover the unconsumed hydrogen from the anode and transport it back to the inlet of the battery stack to improve the hydrogen utilization efficiency. In this paper, to determine the optimal parameter configuration of the HCP, a multifactor and multi-objective optimization design method is proposed, and the influences of various design parameters on the performance of the HCP are analyzed based on the verified overset grid simulation method. The research results show that the proposed coupling design method can effectively achieve the optimal parameter configuration of the HCP, with diameter-to-pitch ratio κ = 1.47, rotor blade number Z = 3, and helix angle φ = 60°, which is validated using another model with significant performance advantages. In the process of studying the influence of design parameters, it is found that the average flow rate of the HCP is directly proportional to the diameter-to-pitch ratio and the blade number, gradually decreases in the range of helix angle from 0° to 22.5°, and increases in the range of helix angle from 22.5° to 60°. The flow pulsation value and pressure pulsation value of the HCP are less affected by the diameter-to-pitch ratio, decrease with the increase of the blade number, and show a trend of first increasing and then decreasing with the increase of the helix angle.

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“…Today, more than 60% of electricity consumption in the industry is from electric motors. Therefore, increasing their efficiency leads to significant savings in energy consumption (Li et al 2019) and a reduction in pollution and emission of greenhouse gases that cause climate change (Li et al 2020;Cheng et al 2020;Cheng et al 2019). Constant speed pumps have a fixed rotational speed of the impellers which limit the ability to modify the flow.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of variable speed pumps in pressurized water distribution systems

2022

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In pressurized water distribution systems, a constant speed pump is often used because of its simplicity. However, constant speed pumps are not easily able to deal with changing demands in water flows. When the demand for the discharge differs from the design discharge, the required demand (discharge and head) could be met by changing the pump speed without making any special changes in the system. Using an electronic drive circuit, the electrical frequency can be changed, and the rotation speed of the pump motor can thus be modified. In this study, the application of variable speed pumps in pressurized irrigation systems is investigated. Two pumping station scenarios including a fixed speed pump and a variable speed pump are considered. The selected pump station includes a real sprinkler irrigation system near Tabriz city, Iran, with 3 lateral pipes and 600 m length of main pipe. The diameter of the main pipes is 8 and 6 inches. The results show that using a variable speed pump increases the average pump efficiency by 18.7%. In addition, the variable speed pump system reduces the electrical consumption 57.6% compared to a fixed speed pump. Therefore, the use of variable speed pumps in pressurized systems is recommended. Step-by-step calculations for a sprinkler irrigation system design are the contribution of this study. This information helps engineers who are not familiar with commutation process.

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Numerical research on viscous oil flow characteristics inside the rotor cavity of rotary lobe pump

Cited by 17 publications

References 23 publications

Numerical simulation and experimental performance research of cylindrical vane pump

Numerical simulation and experimental performance research of cylindrical vane pump

Multifactor and multi-objective coupling design of hydrogen circulation pump

Evaluation of variable speed pumps in pressurized water distribution systems

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