Flow characteristics of accelerating pump in hydraulic-type wind power generation system under different wind speeds

Xie, Fangwei; Xuan, Rui; Sheng, Gang; Wang, Cuntang

doi:10.1007/s00170-017-0122-7

Cited by 14 publications

(8 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Fangwei et al [117] presented a very interesting work regarding a gerotor pump working in a hydraulic wind power generation system. Based on an AMESim ® model and experimental work, low-speed conditions were assessed.…”

Section: Integrated Methodsmentioning

confidence: 99%

A Review of Gerotor Technology in Hydraulic Machines

2019

View full text Add to dashboard Cite

Over the years, numerous investigations have established the gerotor fundamentals. This work aims to provide a complete review of the literature from the last decade, focusing on the articles published in the past five years on gerotor technology in hydraulic machines. The report gives a catalogue of guidelines based on the trochoidal-envelope definition, a background analysis, the worldwide distribution of articles in each continent and country and the most frequently used keywords in the field. The paper identifies state-of-the-art research, and reports on current mainstream ideas. From the historical background, this literature review reports the current approaches in gerotor pumps (geometry and performance approaches, modeling and numerical simulations), orbital motors and new concepts. The report will serve as a guide and a directory for novel engineers working with gerotor technology in hydraulic machines. Another intention of this paper is to disseminate the works of the researchers who use this technology around the world, and to provide a scenario for future international collaboration. The paper gives an account of the disparity between academia and engineering applications. There is currently very little published literature on design and production methodologies for gerotor pumps and orbital motors. Hence, the future goal is to collect recommendations that combine academia and industry expertise to make better use of these extensive studies in the field.

show abstract

Section: Integrated Methodsmentioning

confidence: 99%

A Review of Gerotor Technology in Hydraulic Machines

2019

View full text Add to dashboard Cite

show abstract

“…The thrust produced by the pump-jet propeller can be explained by Newton's third discipline. The lifting method, based on one-and two-element design theories, was originally applied to the design of axial flow pump blades, which is still widely used in the design of axial flow pumps [21][22][23]. The design of the rotor by the lifting method is completely based on the assumption of the independence of the cylindrical layer.…”

Section: Lifting Design Methodsmentioning

confidence: 99%

Comparative Investigation on Hydrodynamic Performance of Pump-Jet Propulsion Designed by Direct and Inverse Design Methods

et al. 2021

View full text Add to dashboard Cite

Pump-jet propulsion, a new propulsion technology, is primarily designed for underwater vehicles. Because of its concealment and excellent performance, it has been widely used, but due to its confidentiality and complexity, few studies have been published. To explore the relevant design theory of pump-jet propulsion with the aim of increasing its performance, in this study, we applied the direct and inverse design methods to construct a three-dimensional pump-jet model. The direct design method was carried out by comparing the lifting and lifting-line design methods, followed by further geometric optimization of the better model. In a numerical study using computational fluid dynamics (CFD) simulations, the Reynolds Averaged Naviere-Stokes (RANS) equations with SST k-ω turbulence model were solved in a cylindrical computational domain around the pump-jet propulsion device. A numerical investigation of the E779A propeller was carried out beforehand, using different advance ratios, in order to validate the accuracy of the numerical simulation method. The results show that for the direct method, although the model designed using the lifting-line method produced a greater thrust and the pump-jet designed using the lifting method was more efficient and stable, which is more suitable for small and medium underwater vehicles. When considering the inverse design method, the pump-jet propeller obviously accelerated the fluid, and the speed was obviously greater than that designed using the direct design method, while the turbulent kinetic energy in the flow field was higher, as well as the energy loss. Therefore, for small- and medium-sized underwater vehicles, if the priorities are high thrust and high efficiency, the inverse design method is the best option, whereas if stability and lower energy loss are preferred, the direct design method should be adopted.

show abstract

“…The cycloid curve, also called the brachistochrone curve, is the shortest time drop path passing through two points. It has been widely used to in in accelerating and diffusing wind flow effectively owing to its advantageous characteristics (Fangwei et al, 2017;Hashem et al, 2020). This cycloid curve enables the rapid alteration of the direction and velocity of particles along the flow direction.…”

Section: Introductionmentioning

confidence: 99%

Development of an Axial Cyclone for High-performance: Application of Cycloid Curve and Multi Objective Optimization

Cho

Yun

Kim

2022

Aerosol Air Qual. Res.

View full text Add to dashboard Cite

Reducing particulate emission is a key factor in improving the air quality as particulate matter cause respiratory diseases. In this study, an axial cyclone was selected from several existing technologies to reduce particulate emissions owing to its outstanding separation performance and low-pressure drop. To enhance the axial cyclone, the fastest descending curve among the lines that pass through two points was selected; it induces faster momentum changes from the axial to the tangential direction. Therefore, the selected cycloid curve was applied to the vanes and body of the axial cyclone. The particle trajectory was simulated using a discrete phase model (DPM) in ANSYS Fluent ver. 2020 R2. Furthermore, the external structure of the axial cyclone was optimized via multi-objective optimization based on response surface methodology. Additionally, experiments were conducted to evaluate the proposed cyclone performance. Without applying the cycloid curve, the separation efficiency and the pressure drop were 73.6% and 1013.3 Pa, respectively. In the case of the cycloid-applied axial cyclone, however, the separation efficiency and pressure drop were 91.6% and 1109.6 Pa, respectively. Thus, the application of the cycloid curve improved the cyclone performance by approximately 24.5%.

show abstract

Flow characteristics of accelerating pump in hydraulic-type wind power generation system under different wind speeds

Cited by 14 publications

References 4 publications

A Review of Gerotor Technology in Hydraulic Machines

A Review of Gerotor Technology in Hydraulic Machines

Comparative Investigation on Hydrodynamic Performance of Pump-Jet Propulsion Designed by Direct and Inverse Design Methods

Development of an Axial Cyclone for High-performance: Application of Cycloid Curve and Multi Objective Optimization

Contact Info

Product

Resources

About