Analysis of the flow dynamics characteristics of an axial piston pump based on the computational fluid dynamics method

Zhang, Bin; Ma, Jien; Hong, Haocen; Yang, Huayong; Fang, Youtong

doi:10.1080/19942060.2015.1091686

Cited by 34 publications

(29 citation statements)

References 14 publications

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“…Axial piston pumps are used in high pressure applications [40], and their average efficiency η pu is 85%. The cost of the pumping system C pu can be calculated by using Equation (12) [39]:…”

Section: Mechanical Components and Piping Systemmentioning

confidence: 99%

Techno-Economic Feasibility Study of a Hypersaline Pressure-Retarded Osmosis Power Plants: Dead Sea–Red Sea Conveyor

et al. 2018

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In this study, three pressure retarded osmosis (PRO) power plants are proposed to be built on the Red Sea–Dead Sea (RSDS) water conveyance project, to generate power from the salinity gradient between two water streams at different salt concentrations. The first two proposed plants are to be built after sea water reverse osmosis (SWRO) desalination plants, where Red Sea water and the rejected brine from SWRO plants are used as feed and draw solutions, respectively. In the third proposed plant, Red Sea water and Dead Sea water will be used. Results showed that the three proposed plants are technically feasible while the third plant is the only one that is economically feasible with a 134.5 MW capacity and a 0.056 $/KWh levelized cost of electricity (LCE). The power generated from the third PRO power plant accounts for about 24.7% of the power needed for the RSDS project that can be used to power SWRO-2 in order to reduce the electricity consumption by 49.3%. If the generated power from the proposed PRO plant is sold to the Jordanian national electricity grid at the current selling price in accordance with Jordanian prices of electricity, a saving of about 21.2% can be attained. It is found that using the power generated by the current proposed plants for desalination project purposes will significantly reduce the price of desalinated water produced from SWRO desalination plants.

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Section: Mechanical Components and Piping Systemmentioning

confidence: 99%

Techno-Economic Feasibility Study of a Hypersaline Pressure-Retarded Osmosis Power Plants: Dead Sea–Red Sea Conveyor

et al. 2018

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“…Additionally, with the development of computer technology and the rapid improvement of hard software capability, commercial Computational Fluid Dynamics (CFD) software enables researchers to devote more energy to considering the physical nature of computational flow problems, as well as the rationality of boundary (initial value) conditions and calculation results (Akbarian et al, 2018;Chau & Jiang, 2002, 2004Faizollahzadeh Ardabili et al, 2018;Gao, Zhang, Liu, Sun, & Tian, 2018;Mou, He, Zhao, & Chau, 2017;Peng, Gui, & Fan, 2018;Wu & Chau, 2006;Zhang, Ma, Hong, Yang, & Fang, 2017). CFD analysis has been widely applied for orifice flow predictions in recent years (Araoye, Badr, & Ahmed, 2017;Di Rito, 2007;Reader-Harris, Barton, & Hodges, 2012;Roul & Dash, 2012;Schrank & Murrenhoff, 2013;Shah, Joshi, Kalsi, Prasad, & Shukla, 2012;Singh & John Tharakan, 2015;von Grabe, Riedel, Stammen, & Murrenhoff, 2013;Yau, Kua, & Balvinder, 2017).…”

Section: Introductionmentioning

confidence: 99%

Investigation of flow through the two-stage orifice

Gao

2019

Engineering Applications of Computational Fluid Mechanics

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In the field of engineering, understanding the flow characteristics of an orifice is key to accurately controlling pressure or flow; however, the transitional flow characteristics of the two-stage orifice has not been studied. The value of the discharge coefficient parameterizing the two-stage orifice flow equation is primarily based on that of the single classic orifice; however, this assumption leads to significant errors, because of the different numbers in the sudden contraction structure. Through theoretical derivation, the flow equations difference between the two-stage orifice and single classic orifice was compared and analyzed. Combing theoretical analysis, Computational Fluid Dynamics (CFD) simulation and experimental measurement, the transitional flow characteristics of the twostage orifice were investigated using mineral oil. The comparison results of the three parts are essentially consistent. In this paper, the discharge coefficient and the pressure drop over the twostage orifice were primarily focused on Reynolds numbers between 900 and 1700. In comparison with the single orifice, the results show that under the same dimensions (d = 3 mm), the discharge coefficient of the two-stage orifice is greater, and the transitional flow state of the two-stage orifice is different from that of the single orifice. Additionally, the pressure drop of the two-stage orifice is less than that of the single orifice under the same volume flow rate. The prestage cylindrical hole slows the changing trend of the flow field parameters, and the second-stage orifice with smaller diameter is mainly responsible for the pressure loss. The current research provides important support for accurate pressure and flow control of the two-stage orifice, and the role of the prestage cylindrical hole can also be a good reference in the structure design of micro-orifices.

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“…In the case of computation in oil-hydraulic components, the discrepancy between incompressible and compressible methods is again observed. Zhang, Ma, Hong, Yang, and Fang (2017) performed a numerical analysis of the flow dynamics characteristics of an axial piston pump. The compressible method shows better agreement with experiment than the incompressible one.…”

Section: Introductionmentioning

confidence: 99%

Comparison of compressible and incompressible numerical methods in simulation of a cavitating jet through a poppet valve

Yuan

Jun

Liu

2018

Engineering Applications of Computational Fluid Mechanics

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The regime of compressible flow generally refers to the super/subsonic case. However, several remarkable cases with low Mach number could not be appropriately described with the incompressible method. It is a similar case for a cavitating jet inside a poppet valve. In order to comprehensively address the discrepancy between incompressible and compressible methods, both non-cavitating and cavitating cases are performed in experiment and calculation based on OpenFOAM. Experiment reveals a transition in flow pattern in both non-cavitating and cavitating flow. For example, for 0.7 mm openness and 30-degree poppet angle, transition happens at approximately 29 and 27 bar pressure drop for the two cases, respectively. In general, results from the compressible method exhibit better agreement with experiment regarding both flow performance and flow structure. By contrast, the incompressible method could not provide an accurate description for the transition process under the applied flow condition. A series of studies are carried out with emphasis on such discrepancy. Firstly, the deviation in flow performance is addressed based on velocity profile and turbulence level. Secondly, the disparity in flow structure is illustrated and the mechanism for cavitation inception is discussed, which combined provide an interpretation of the deficiency of the incompressible method. Thirdly, different inlet boundary conditions are applied, and the results confirm the independence of deficiency of the incompressible method for inlet fluctuation. Finally, a re-examination is proposed concerning traditional notion of compressible flow as well as the applicability of incompressible numerical method.

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Analysis of the flow dynamics characteristics of an axial piston pump based on the computational fluid dynamics method

Cited by 34 publications

References 14 publications

Techno-Economic Feasibility Study of a Hypersaline Pressure-Retarded Osmosis Power Plants: Dead Sea–Red Sea Conveyor

Techno-Economic Feasibility Study of a Hypersaline Pressure-Retarded Osmosis Power Plants: Dead Sea–Red Sea Conveyor

Investigation of flow through the two-stage orifice

Comparison of compressible and incompressible numerical methods in simulation of a cavitating jet through a poppet valve

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