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Journal articles on the topic 'Axial flow pumps Blades'

Author: Grafiati

Published: 4 June 2021

Last updated: 10 February 2022

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1

Yu, Zheqin, Jianping Tan, and Shuai Wang. "Multi-parameter analysis of the effects on hydraulic performance and hemolysis of blood pump splitter blades." Advances in Mechanical Engineering 12, no. 5 (2020): 168781402092129. http://dx.doi.org/10.1177/1687814020921299.

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The splitter blade can effectively optimize pump performance, but there is still insufficient research in blood pumps that cover both hydraulic and hemolysis performance. Thus, the aim of this study was to investigate the effect of key factors related to splitter blade on the performance and flow field of axial flow blood pump. In this study, the number of splitter blades, the axial length, and the circumferential offset were chosen as three objects of study. An analysis of the flow field and performance of the pump by orthogonal array design using computational fluid mechanics was carried out

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2

Tao, Ran, Ruofu Xiao, and Fujun Wang. "Detached eddy simulations for high speed axial flow fuel pumps with swept and straight blade impellers." Engineering Computations 33, no. 8 (2016): 2530–45. http://dx.doi.org/10.1108/ec-06-2015-0165.

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Purpose High speed axial flow pumps are widely used in aircraft fuel systems. Conventional axial flow pumps often generate radial secondary flows at partial-load conditions which influence the flow structure and form a “saddle-shaped” region in the Q-H curve that can destabilize the operation. Thus, the “saddle-shaped” Q-H region must be eliminated. The paper aims to discuss these issues. Design/methodology/approach The swept stacking method is often used for radial flow control in turbo-machinery impeller blade design. Hence, this study uses the swept stacking method to design a high speed ax

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3

Kan, Kan, Yuan Zheng, Huixiang Chen, Jianping Cheng, Jinjin Gao, and Chunxia Yang. "Study into the Improvement of Dynamic Stress Characteristics and Prototype Test of an Impeller Blade of an Axial-Flow Pump Based on Bidirectional Fluid–Structure Interaction." Applied Sciences 9, no. 17 (2019): 3601. http://dx.doi.org/10.3390/app9173601.

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This paper performed a numerical study into the dynamic stress improvement of an axial-flow pump and validated the simulation results with a prototype test. To further analyze the dynamic stress characteristics of impeller blades of axial-flow pumps, a bidirectional fluid–structure interaction (FSI) was applied to numerical simulations of the unsteady three-dimensional (3-D) flow field of the whole flow system of an axial-flow pump, and the gravity effect was also taken into account. In addition, real-structure-based single-blade finite element model was established. By using the finite elemen

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4

Shi, Xiaobing, Jinling Lu, and Lianming Zhao. "Investigations on the influence of tandem blades on inner flow and performance characteristics of centrifugal pump." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 234, no. 1 (2019): 46–55. http://dx.doi.org/10.1177/0954408919883730.

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Although significant advances have been made in tandem-blade technology for axial and centrifugal compressors, little attention has been paid to its application in centrifugal pumps. In this study, we propose a new tandem-blade design method for improving inner flow characteristics and overall performance of a centrifugal pump. With the SST k − ω turbulence model, three-dimensional turbulent flow fields in the centrifugal pump with tandem blades are simulated and analyzed. The effects of tandem blades on the inner flow and performance characteristics of the centrifugal pump are investigated. T

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5

Pan, Qiang, Weidong Shi, Desheng Zhang, BPM van Esch, and Ruijie Zhao. "Fish-friendly design of an axial flow pump impeller based on a blade strike model." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 234, no. 2 (2019): 173–86. http://dx.doi.org/10.1177/0957650919849768.

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With environmental awareness growing in many countries, governments are taking measures to reduce mortality of migrating fish in pumping stations. Manufacturers seek to develop pumps that are less damaging to fish and still provide good hydraulic performance, but little is known about the implications design modifications may have on internal flow characteristics and overall hydraulic performance. In this paper, an integrated design method is proposed that combines a validated blade strike model for fish damage and a computational fluid dynamics method to assess the pump performance. A redesig

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6

Fang, Peng, Jianjun Du, and Shunzhou Yu. "Impeller (straight blade) design variations and their influence on the performance of a centrifugal blood pump." International Journal of Artificial Organs 43, no. 12 (2020): 782–95. http://dx.doi.org/10.1177/0391398820913559.

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Introduction: The miniaturization of blood pumps has become a trend due to the advantage of easier transplantation, especially for pediatric patients. In small-scale pumps, it is much easier and more cost-efficient to manufacture the impeller with straight blades compared to spiral-profile blades. Methods: Straight-blade impeller designs with different blade angles, blade numbers, and impeller flow passage positions are evaluated using the computational fluid dynamics method. Blade angles (θ = 0°, 20°, 30°, and 40°), blade numbers ( N = 5, 6, 7, and 8), and three positions of impeller flow pas

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7

Nishi, Yasuyuki, and Junichiro Fukutomi. "Component Analysis of Unsteady Hydrodynamic Force of Closed-Type Centrifugal Pump with Single Blades of Different Blade Outlet Angles." International Journal of Rotating Machinery 2015 (2015): 1–17. http://dx.doi.org/10.1155/2015/419736.

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Single-blade centrifugal impellers for sewage systems undergo both unsteady radial and axial thrusts. Therefore, it is extremely important for the improvement of pump reliability to quantitatively grasp these fluctuating hydrodynamic forces and determine the generation mechanism behind them. In this study, we conducted component analyses of radial and axial thrusts of closed, single-blade centrifugal pumps with different blade outlet angles by numerical analysis while considering leakage flow. The results revealed the effect of the blade outlet angle on the components of radial and axial thrus

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8

SU, BOYANG, LEOK POH CHUA, and LIANG ZHONG. "NUMERICAL STUDIES OF AN AXIAL FLOW BLOOD PUMP WITH DIFFERENT DIFFUSER DESIGNS." Journal of Mechanics in Medicine and Biology 13, no. 03 (2013): 1350029. http://dx.doi.org/10.1142/s0219519413500292.

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Most axial flow blood pumps basically consist of a straightener, an impeller, and a diffuser. The diffuser plays a very important role in the performance of the pump to provide an adequate pressure head and to increase the hydraulic efficiency. During the development of an axial flow blood pump, irregular flow field near the diffuser hub is not desirable as it may induce thrombosis. In order to avoid this phenomenon, two approaches were adopted. In the first approach, the number of the diffuser blades was increased from three (B3, baseline model) to five (B5 model). It was observed that the fl

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9

WU, HUACHUN, GAO GONG, ZHIQIANG WANG, YEFA HU, and CHUNSHENG SONG. "STRUCTURAL DESIGN AND NUMERICAL SIMULATION OF THE DIFFUSER FOR MAGLEV AXIAL BLOOD PUMP." Journal of Mechanics in Medicine and Biology 14, no. 03 (2014): 1450045. http://dx.doi.org/10.1142/s0219519414500456.

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Hydraulic performance is an especially important factor for maglev axial blood pumps that have been used in patients with heart disease. Most maglev axial blood pumps basically consist of a straightener, an impeller and a diffuser. The diffuser plays a key role in the performance of the maglev axial blood pump to provide an adequate pressure head and increase the hydraulic efficiency. Maglev axial blood pumps with various structural diffusers exhibit different hydraulic performance. In this study, computational fluid dynamics (CFD) analysis was performed to quantify hydrodynamic in a maglev ax

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10

Beznosov, Aleksandr V., Pavel A. Bokov, Aleksandr V. Lvov, Tatyana A. Bokova, Nikita S. Volkov, and Aleksandr R. Marov. "Experimental studies into the performance of the lead coolant axial pump wet ends to justify main circulation pumps for the HMLC reactor plant circuits." Nuclear Energy and Technology 6, no. 3 (2020): 143–47. http://dx.doi.org/10.3897/nucet.6.57736.

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The paper presents the results of the studies to justify the design solutions for the main circulation pumps of the heavy liquid-metal cooled reactor plant circuits. A substantial difference has been shown in the performance of pumps for the heavy liquid-metal coolant transfer. The studies have confirmed the qualitative difference in the cavitation performance of coolants, the state of the gases and vapors they contain, the influence of supply and discharge devices, and the effects of the impeller blade section performance and geometry and the hub-tip ratio on the pump performance. The studies

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11

Gusak, Alexander, Olga Matvienko, and Victor Nenja. "Investigation of Energy Losses in the Flow Section of the Small-Sized Axial-Flow Pump." Applied Mechanics and Materials 630 (September 2014): 29–34. http://dx.doi.org/10.4028/www.scientific.net/amm.630.29.

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The theses present results of a study of a small-sized axial-flow stage with blades of small aspect ratio, which is designed for submersible borehole pumps. The energy losses in the flow section of stage are analyzed in research. Refined equations of total hydraulic losses for these flow parts were received by numerical simulation. The results of numerical simulation are compared with experimental data.

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12

Fang, Bing, Qi Dou Zhou, Jian Bo Xie, and Ming Zhong Qiao. "Test Research on the New Electromechanical Axial-Flow Pump with Advantages of Small Vibration and Noise." Advanced Materials Research 605-607 (December 2012): 267–70. http://dx.doi.org/10.4028/www.scientific.net/amr.605-607.267.

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For the vibration and noise of conventional axial-flow pumps being oppressive, a new electromechanical axial-flow pump with advantages of small vibration and noise had been designed, which integrated the impeller into drive electromotor by combining the rotor of motor and the blade of impeller. The new electromechanical axial-flow pump not only had small size and high efficiency, but also can greatly reduce vibration and noise by taking off the drive axis of pump. Performance tests had been done for the pump and results showed that the efficiency and head were very close to design value. Vibra

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13

Zhu, Di, Ran Tao, and Ruofu Xiao. "Anti-Cavitation Design of the Symmetric Leading-Edge Shape of Mixed-Flow Pump Impeller Blades." Symmetry 11, no. 1 (2019): 46. http://dx.doi.org/10.3390/sym11010046.

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Mixed-flow pumps compromise large flow rate and high head in fluid transferring. Long-axis mixed-flow pumps with radial–axial “spacing” guide vanes are usually installed deeply under water and suffer strong cavitation due to strong environmental pressure drops. In this case, a strategy combining the Diffusion-Angle Integral Design method, the Genetic Algorithm, and the Computational Fluid Dynamics method was used for optimizing the mixed-flow pump impeller. The Diffusion-Angle Integral Design method was used to parameterize the leading-edge geometry. The Genetic Algorithm was used to search fo

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14

Schüle, Chan Y., Klaus Affeld, Max Kossatz, Christian O. Paschereit, and Ulrich Kertzscher. "Turbulence Measurements in an Axial Rotary Blood Pump with Laser Doppler Velocimetry." International Journal of Artificial Organs 40, no. 3 (2017): 109–17. http://dx.doi.org/10.5301/ijao.5000571.

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Background The implantation of rotary blood pumps as ventricular assist devices (VADs) has become a viable therapy for quite a number of patients with end-stage heart failure. However, these rotary blood pumps cause adverse events that are related to blood trauma. It is currently believed that turbulence in the pump flow plays a significant role. But turbulence has not been measured to date because there is no optical access to the flow space in rotary blood pumps because of their opaque casings. Methods This difficulty is overcome with a scaled-up model of the HeartMate II (HM II) rotary bloo

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15

Zhang, De-Sheng, Qiang Pan, Zhang Hu, Wei-Dong Shi, Rui-Jie Zhang, and Jin Xing. "Numerical simulation and optimization of solid-liquid two-phase flow in a back-swept axial-flow pump." Thermal Science 21, no. 4 (2017): 1751–57. http://dx.doi.org/10.2298/tsci160310064z.

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The simulation study is proposed to analyze the wear property of the axial flow pump using the sewage as medium. Different axial flow pumps are designed with different back-swept angles, of which are 40?, 65?, and 90?. Numerical simulation results showed the relationship between solid volume fraction and back-swept angle on the pressure/suction surface, as well as the particle diameter. To validate the correctness of numerical investigation, the result of the 65? backswept blade model was compared with a sludge axial flow pump in sewage treatment plant, which showed fair agreement with the sim

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16

Beznosov, Aleksander V., Aleksander V. Lvov, Pavel A. Bokov, Tatyana A. Bokova, and Nikita S. Lukichev. "Experimental studies into the dependences of the axial lead coolant circulation pump performance on the pump straightening device parameters." Nuclear Energy and Technology 5, no. 3 (2019): 237–40. http://dx.doi.org/10.3897/nucet.5.39340.

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The paper presents the results of experimental studies into the dependences of the axial pump performance (delivery rate, head, efficiency) in lead coolant on the parameters of the straightening device (SD) installed downstream of the impeller (the SD inlet flow angle and the number of the SD blades with a variable impeller speed change). The studies were performed as applied to the operating conditions of small and medium plants with lead cooled fast neutron reactors with horizontal steam generators (BRS GPG). The designs of such plants are being matured at Nizhny Novgorod State Technical Uni

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17

Cao, Lei, Zhengwei Wang, Yexiang Xiao, and Yongyao Luo. "Numerical Investigation of Pressure Fluctuation Characteristics in a Centrifugal Pump with Variable Axial Clearance." International Journal of Rotating Machinery 2016 (2016): 1–11. http://dx.doi.org/10.1155/2016/9306314.

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Clearance flows in the sidewall gaps of centrifugal pumps are unsteady as well as main flows in the volute casing and impeller, which may cause vibration and noise, and the corresponding pressure fluctuations are related to the axial clearance size. In this paper, unsteady numerical simulations were conducted to predict the unsteady flows within the entire flow passage of a centrifugal pump operating in the design condition. Pressure fluctuation characteristics in the volute casing, impeller, and sidewall gaps were investigated with three axial clearance sizes. Results show that an axial clear

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18

Panov, Yu G., L. G. Zadanovskii, and V. S. �rdraikh. "Standard hydraulic drive for adjusting the impeller blades of axial and mixed-flow pumps." Chemical and Petroleum Engineering 25, no. 6 (1989): 323–25. http://dx.doi.org/10.1007/bf01156210.

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19

Chen, Xin, Jian Ping Tan, and Zhong Yun. "Particle Tracking Computational Prediction of Hemolysis by Blade of Micro-Axial Blood Pump." Advanced Materials Research 160-162 (November 2010): 1779–86. http://dx.doi.org/10.4028/www.scientific.net/amr.160-162.1779.

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By analyzing fluid dynamics of blood in an artificial blood pump and simulating the flow field structure and the flow performance of blood, the blood flow and the damages in the designed blood pump would be better understood. This paper describes computational fluid dynamic (CFD) used in predicting numerically the hemolysis of blade in micro-axial blood pumps. A numerical hydrodynamical model, based on the Navier-Stokes equation, was used to obtain the flow in a micro-axial blood pump. A time-dependent stress acting on blood particle is solved in this paper to explore the blood flow and damage

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20

Harun, Amrin F., Mauricio G. Prado, Siamack A. Shirazi, and Dale R. Doty. "Two-Phase Flow Modeling of Inducers." Journal of Energy Resources Technology 126, no. 2 (2004): 140–48. http://dx.doi.org/10.1115/1.1738124.

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Inducers, which are classified as axial flow pumps with helical path blades, are used within rotary gas separators commonly used in electrical submersible pump installations. A two-phase flow model has been developed to study the inducer performance, focusing on head generation. The proposed model is based on a meridional flow solution technique and utilizes a two-fluid approach. The model indicates that head degradation due to gas presence is a function of flow pattern. The effect of flow pattern diminishes when the void fraction is greater than 15 percent since the centrifugal force dominate

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21

Shi, Lijian, Jun Zhu, Yao Yuan, et al. "Numerical Simulation and Experiment of the Effects of Blade Angle Deviation on the Hydraulic Characteristics and Pressure Pulsation of an Axial-Flow Pump." Shock and Vibration 2021 (January 2, 2021): 1–14. http://dx.doi.org/10.1155/2021/6673002.

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Inadequate blade angle adjustment or manufacturing errors will cause inconsistencies in the blade angle of an axial-flow pump. In this study, the hydrodynamic characteristics of an axial-flow pump with inconsistent blade angle are investigated by analyzing hydraulic performance and pressure pulsation. The analysis is conducted by performing a numerical simulation combined with a model test. Results show that, relative to the case without blade angle deviation, the case with blade angle deviation exhibits changes in the periodicity of the flow field in the impeller. Such changes result in uneve

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22

Wang, Shuo, Liaojun Zhang, and Guojiang Yin. "Numerical Investigation of the FSI Characteristics in a Tubular Pump." Mathematical Problems in Engineering 2017 (2017): 1–9. http://dx.doi.org/10.1155/2017/7897614.

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Flow condition was simulated in a shaft tubular pump by using the Shear-Stress Transport (SST) k-ω turbulence model with high quality structured grids in design condition. Corresponding structural vibration characteristics were then analyzed based on two-way coupled Fluid-Structure Interaction (FSI) method. Fluid results showed that flow in the outlet flow passage was a combination of the axial flow and circumferential rotation motion. Time and frequency domain analysis of pressure pulsation of typical measure points indicated that larger pulsation amplitudes appeared in the tip of the blades

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23

Zhang, Hong-li, Fan-yu Kong, Ai-xia Zhu, Fei Zhao, and Zhen-fa Xu. "Effect of Blade Outlet Angle on Radial Force of Marine Magnetic Drive Pump." Shock and Vibration 2020 (September 11, 2020): 1–18. http://dx.doi.org/10.1155/2020/8827333.

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To research the effects of the blade outlet angle on the performance and the radial force of the marine pump, the unsteady numerical simulation of the four different models is carried out. The radial forces on the impeller and the blades are obtained under different flow rate conditions. The time and frequency domain characteristics of radial resultant force on the impeller and the blades are analyzed and those of the impeller torque are researched. The results show that the radial forces of the impeller and the blades increase with the increase of the blade outlet angle at the same flow rate.

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24

Shen, Simin, Zhongdong Qian, and Bin Ji. "Numerical Analysis of Mechanical Energy Dissipation for an Axial-Flow Pump Based on Entropy Generation Theory." Energies 12, no. 21 (2019): 4162. http://dx.doi.org/10.3390/en12214162.

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Mechanical energy dissipation is a major problem affecting hydraulic machinery especially under partial-load conditions. Owing to limitations of traditional methods in evaluating mechanical energy dissipation, entropy generation theory is introduced to study mechanical energy dissipation with varying discharge and tip clearance intuitively through numerical simulations in an axial-flow pump. Results show that the impeller and diffuser are the main domains of mechanical energy dissipation, respectively accounting for 35.32%–55.51% and 32.61%–20.42% of mechanical energy dissipation throughout th

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25

Baek, Seok Heum, Won Hyuk Jung, and Sangmo Kang. "Shape Optimization of Impeller Blades for Bidirectional Axial Flow Pump." Transactions of the Korean Society of Mechanical Engineers B 36, no. 12 (2012): 1141–50. http://dx.doi.org/10.3795/ksme-b.2012.36.12.1141.

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26

Potapov, V. A., and A. A. Sanko. "Performance simulation of multi-stage axial-flow compressor of turbo-shaft engine with account for erosive wear nonlinearity of its blades." Civil Aviation High Technologies 23, no. 5 (2020): 39–53. http://dx.doi.org/10.26467/2079-0619-2020-23-5-39-53.

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The construction and useful practice of gas-turbine engine diagnosis systems depend largely on the availability of the engine mathematical models and its certain components in their structure. Utilization of multi-stage axial flow compressor performance with account for erosive wear of its parts during the operation fundamentally raises possibilities of such systems as erosive wear of flow channel, blade rings of impellers and vane rings of multi-stage compressor is a common cause of preschedule gas-turbine engine detaching from an aircraft. As evidenced by various contributions presented in t

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27

Li, Guoping, Eryun Chen, Ailing Yang, Zhibin Xie, and Gaiping Zhao. "Effect of Guide Vanes on Flow and Vibroacoustic in an Axial-Flow Pump." Mathematical Problems in Engineering 2018 (October 30, 2018): 1–11. http://dx.doi.org/10.1155/2018/3095890.

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An effect of guide-vane numbers on pressure fluctuations and structural vibroacoustics induced by unsteady flow is performed by a hybrid numerical method. A 3D flow field is simulated in axial-flow pump with four impeller blades, in which three diffuser models with 5, 7, and 9 vanes are devised to match, respectively. A full scale structural vibroacoustics coupled model is solved using LMS acoustics software. The results show that the blade-passing frequency (BPF) is dominated frequency of the vibration acceleration of pump, which is consistent with frequency spectral characteristics of pressu

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28

Yin, Ying Jie, and Xing Mao Yuan. "The Casting Process Optimization of the End Blade of ZLT1200 Axial Flow Pump." Applied Mechanics and Materials 268-270 (December 2012): 875–78. http://dx.doi.org/10.4028/www.scientific.net/amm.268-270.875.

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The casting process design and simulation of the end blade of ZLT1200 axial flow pump were presented in this paper. Three kinds of casting processes were designed and simulated using ProCAST. The 3D models of the casting processes were set up by Pro/E software. The optimized cast process was selected by simulation results. Practical production of optimized cast process was also carried out. The practical production results indicated that the selected cast process can meet the practical production demand and that end blades with high quality were manufactured.

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29

Zierke, W. C., K. J. Farrell, and W. A. Straka. "Measurements of the Tip Clearance Flow for a High-Reynolds-Number Axial-Flow Rotor." Journal of Turbomachinery 117, no. 4 (1995): 522–32. http://dx.doi.org/10.1115/1.2836564.

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A high-Reynolds-number pump (HIREP) facility has been used to acquire flow measurements in the rotor blade tip clearance region, with blade chord Reynolds numbers of 3,900,000 and 5,500,000. The initial experiment involved rotor blades with varying tip clearances, while a second experiment involved a more detailed investigation of a rotor blade row with a single tip clearance. The flow visualization on the blade surface and within the flow field indicate the existence of a trailing-edge separation vortex, a vortex that migrates radially upward along the trailing edge and then turns in the circ

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30

Kim, Youn-Sung, Man-Woong Heo, Hyeon-Seok Shim, Bong-Soo Lee, Dong-Hwan Kim, and Kwang-Yong Kim. "Hydrodynamic Optimization for Design of a Submersible Axial-Flow Pump with a Swept Impeller." Energies 13, no. 12 (2020): 3053. http://dx.doi.org/10.3390/en13123053.

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Submersible pumps are now in high demand due to the sporadic occurrence of recent torrential rains. The current study was carried out to investigate the hydraulic characteristics of a submersible axial-flow pump with a swept impeller and to optimize the impeller and diffuser shapes of the pump to enhance the hydraulic performance. Three-dimensional Reynolds-averaged Navier–Stokes equations were solved with the shear stress transport turbulence model. The governing equations were discretized using the finite volume method, and unstructured tetrahedral and hexahedral meshes were used in the grid

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Nejad, Jafar, Alireza Riasi, and Ahmad Nourbakhsh. "Parametric study and performance improvement of regenerative flow pump considering the modification in blade and casing geometry." International Journal of Numerical Methods for Heat & Fluid Flow 27, no. 8 (2017): 1887–906. http://dx.doi.org/10.1108/hff-03-2016-0088.

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Purpose Regenerative flow pump (RFP) is a rotodynamic turbomachine capable of developing high pressure rise at low flow rates. This paper aims to numerically investigate the performance of a regenerative pump considering the modification in blade and casing geometry. Design/methodology/approach The radial blade shape was changed to the bucket form and a core is added to flow path. A parametric study was performed to improve the performance of the pump. Thus, the effect of change in blade angle, chord, height, pitch to chord ratio and also inlet port on the performance of RFP was investigated.

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Su, Xianghui, Zhenji Tang, Yi Li, Zuchao Zhu, Kamila Mianowicz, and Peter Balaz. "Research of Particle Motion in a Two-Stage Slurry Transport Pump for Deep-Ocean Mining by the CFD-DEM Method." Energies 13, no. 24 (2020): 6711. http://dx.doi.org/10.3390/en13246711.

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The slurry transport pump is the key equipment of deep-ocean mining systems. The motion law of coarse particles in the pump is not clear enough. In this paper, a hydraulic model of a laboratory-scale two-stage slurry transport pump is constructed, and the motion characteristics of coarse particles in the pump are numerically studied by using the computational fluid dynamics–discrete element method (CFD-DEM) method. The performance curve of the pump is obtained by experimental measurement, and the reliability of the calculated results is verified. Due to the application of the amplification flo

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33

Adel, Mohamed, and Nabil H. Mostafa. "Unsteady Numerical and Experimental Study of Cavitation in Axial Pump." International Journal of Manufacturing, Materials, and Mechanical Engineering 4, no. 1 (2014): 55–68. http://dx.doi.org/10.4018/ijmmme.2014010104.

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This paper presents an experimental and three-dimensional numerical study of unsteady, turbulent, void growth and cavitation simulation inside the passage of the axial flow pump. In this study a 3D Navier-Stokes code was used (CFDRC, 2008) to model the two-phase flow field around a four blades axial pump. The governing equations are discretized on a structured grid using an upwind difference scheme. The numerical simulation used the standard K-e turbulence model to account for the turbulence effect. The numerical simulation of void growth and cavitation in an axial pump was studied under unste

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34

Throckmorton, A. L., J. Kapadia, and D. Madduri. "Mechanical axial flow blood pump to support cavopulmonary circulation." International Journal of Artificial Organs 31, no. 11 (2008): 970–82. http://dx.doi.org/10.1177/039139880803101107.

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We are developing a collapsible, percutaneously inserted, axial flow blood pump to support the cavopulmonary circulation in infants with a failing single ventricle physiology. An initial design of the impeller for this axial flow blood pump was performed using computational fluid dynamics analysis, including pressure-flow characteristics, scalar stress estimations, blood damage indices, and fluid force predictions. A plastic prototype was constructed for hydraulic performance testing, and these experimental results were compared with the numerical predictions. The numerical predictions and exp

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35

Zhang, De Sheng, Wei Dong Shi, Yan Xu, and Fei Long. "Numerical Simulation of Solid Particles Movement in the Axial Flow Impeller and Wear Experiment." Applied Mechanics and Materials 152-154 (January 2012): 1572–77. http://dx.doi.org/10.4028/www.scientific.net/amm.152-154.1572.

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The performance curves of a submersible axial flow pump were predicted based on mixture multiphase flow model, RNG k-ε turbulence model and SIMPLEC algorithm, and the solid-liquid two-phase flow in the impeller was simulated. The numerical results show that the performance prediction of the head and efficiency curves show good agreement with the experimental data in the whole flow rate range, and the solid particles in the impeller are mainly distributed on pressure side of blades, while less on the suction side.The solid particles are mainly concentrated in the blade inlet and region near the

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36

Yang, Fan, Zhongbin Li, Yao Yuan, Chao Liu, Yiqi Zhang, and Yan Jin. "Numerical and Experimental Investigation of Internal Flow Characteristics and Pressure Fluctuation in Inlet Passage of Axial Flow Pump under Deflection Flow Conditions." Energies 14, no. 17 (2021): 5245. http://dx.doi.org/10.3390/en14175245.

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The deflection flow of inlet passage seriously affects the performance of axial flow pump devices, and reduces the operation efficiency and stability of pumping station systems. In this paper, the influence of different deflection angles on the internal flow characteristics and outlet pulsation characteristics of the inlet passage of the vertical axial flow pump are studied. Based on the Reynolds time-averaged N-S equation of the three-dimensional incompressible fluid and the standard k-ε turbulence model, the model axial flow pump device was numerically simulated. Under optimal working condit

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Goltz, I., G. Kosyna, U. Stark, H. Saathoff, and S. Bross. "Stall inception phenomena in a single-stage axial-flow pump." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 217, no. 4 (2003): 471–79. http://dx.doi.org/10.1243/095765003322315531.

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The paper describes an experimental investigation on stall inception phenomena in a single-stage axial-flow pump, utilizing an oil flow technique and two different photo techniques. Moreover, the unsteady casing wall pressure was measured. Representative results are shown and discussed: the pump characteristic for two different NPSH values, selected oil flow pictures of the casing wall and the rotor blades, the wall pressure distribution at design, selected pictures of the cavitating core of the tip clearance vortex at stable and unstable operating conditions and the visualization of a cross-p

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Bulten, Norbert W. H., and Bart P. M. van Esch. "Fully Transient CFD Analyses of Waterjet Pumps." Marine Technology and SNAME News 44, no. 03 (2007): 185–93. http://dx.doi.org/10.5957/mt1.2007.44.3.185.

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This paper presents results of fully transient calculations of flow through waterjet pumps. The fully transient method is based on a moving mesh option to implement the rotation of the impeller. In this way, the time-dependent forces acting on the impeller can be determined. These forces can be divided into axial and radial forces, for example, as a result of rotor-stator interaction. In waterjet applications, the nonuniform inflow velocity distribution creates an additional radial impeller force that is steady in the inertial frame of reference. Computational fluid dynamics (CFD) analyses are

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Zhang, Yuquan, Yanhe Xu, Yuan Zheng, et al. "Multiobjective Optimization Design and Experimental Investigation on the Axial Flow Pump with Orthogonal Test Approach." Complexity 2019 (December 5, 2019): 1–14. http://dx.doi.org/10.1155/2019/1467565.

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A multiobjective optimization technique based on the computational fluid dynamics (CFD) simulations and the orthogonal test is proposed to reduce the pressure pulsation in this paper. Three levels of four well-known performance factors L9 (34) were considered in the orthogonal test scheme: the number of blades, the blade setting angle, the hub ratio, and the distance between the blade and the guide vane. The evaluation indexes corresponded to the head, efficiency, shaft power, and pressure pulsation, respectively. An optimal configuration A2B1C2D3 was obtained by comprehensive frequency analys

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Tao, Yi, Shouqi Yuan, Jianrui Liu, Fan Zhang, and Jianping Tao. "The influence of the blade thickness on the pressure pulsations in a ceramic centrifugal slurry pump with annular volute." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 231, no. 5 (2017): 415–31. http://dx.doi.org/10.1177/0957650917708495.

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Due to the serious abrasion caused by the existence of solid phase in slurry, the slurry pumps usually adopt thick impeller blades to prolong its service life. In this paper, the influence of the blade thickness on the transient characteristics, the vibration, and the solid–liquid two-phase flow in a ceramic centrifugal pump with annular volute was investigated by the numerical method. And the experimental test was also conducted for computational fluid dynamics validation. The static pressure, the velocity, the force, and the solid fraction within the impeller passage and the volute casing ha

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Wu, Xian Fang, Hou Lin Liu, Ming Gao Tan, and Hong Hui Li. "Design and Test for High Specific Speed Mixed Flow Pump with Volute." Advanced Materials Research 354-355 (October 2011): 669–73. http://dx.doi.org/10.4028/www.scientific.net/amr.354-355.669.

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The characteristics and research actuality on mixed flow pumps are introduced simplely. A mixed flow pump with volute as diffusion part is designed and its specific speed is 556.8. The axial velocity circulation and blade angle variety with linearity distribution are used to deisign the impeller. The fixed diffeuser between impeller and volute is deigned by arc airfoil.The cross sections of volute are all asymmetry. The commercial code FLUENT is applied to simulate the inner flow in the mixed flow pump and its energy characteristics are predicted according to the simulation results. The inner

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Xu, Bin, Xi Shen, Desheng Zhang, and Weibin Zhang. "Experimental and Numerical Investigation on the Tip Leakage Vortex Cavitation in an Axial Flow Pump with Different Tip Clearances." Processes 7, no. 12 (2019): 935. http://dx.doi.org/10.3390/pr7120935.

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The tip gap existing between the blade tip and casing can give rise to tip leakage flow and interfere with the main flow, which causes unstable flow characteristics and intricate vortex in the passage. Investigation on the tip clearance effect is of great important due to its extensive applications in the rotating component of pumps. In this study, a scaling axial flow pump used in a south-north water diversion project with different sizes of tip clearances was employed to study the tip clearance effect on tip leakage vortex (TLV) characteristics. This analysis is based on a modified turbulenc

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Liu, Guang-Mao, Dong-Hai Jin, Jian-Ye Zhou, et al. "Design and Numerical Evaluation of an Axial Partial-assist Blood Pump for Chinese and other Heart Failure Patients." International Journal of Artificial Organs 40, no. 9 (2017): 489–97. http://dx.doi.org/10.5301/ijao.5000616.

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A fully implantable axial left ventricular assist device LAP31 was developed for Chinese or other heart failure patients who need partial support. Based on the 5-Lpm total cardiac blood output of Chinese without heart failure disease, the design point of LAP31 was set to a flow rate of 3 Lpm with 100-mmHg pressure head. To achieve the required pressure head and good hemolytic performance, a structure that includes a spindly rotor hub and a diffuser with splitter and cantilevered main blades was developed. Computational fluid dynamics (CFD) was used to analyze the hydraulic and hemodynamic perf

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Суббота, Анатолий Максимович, та Виталий Георгиевич Джулгаков. "ПОВЫШЕНИЕ ЭФФЕКТИВНОСТИ ВЕТРОЭНЕРГЕТИЧЕСКОЙ УСТАНОВКИ С ВЕРТИКАЛЬНОЙ ОСЬЮ ВРАЩЕНИЯ". RADIOELECTRONIC AND COMPUTER SYSTEMS, № 1 (23 лютого 2018): 77–86. http://dx.doi.org/10.32620/reks.218.1.10.

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The questions connected with increase of efficiency of functioning of a wind power plant with a vertical axis of rotation are considered.Such plants convert the energy of the wind flow into rotational energy of the generator shaft, pump or other actuators. An overview of the design options for wind turbines of this type is presented. For vertically-axial wind power plants, in comparison with horizontally-propeller ones, it is possible to increase their efficiency by providing insensitivity to wind direction change. This is possible provided that the angular position of the blades with respect

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Dai, Jing, Xueqin Liu, Congbing Huang, et al. "Experiment on Pressure Pulsation of Axial Flow Pump System with Different Runaway Head." Processes 9, no. 9 (2021): 1597. http://dx.doi.org/10.3390/pr9091597.

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The runaway condition is a damage condition for pumps and turbines which can induce the wake vortex, reverse flow, and severe pressure pulsation. This study aimed to research the characteristics of pressure pulsation of axial flow pumps under different runaway conditions, and the runaway model test was performed with different blade angles and heads. Moreover, four pressure sensors were uniformly arranged at the impeller inlet section to eliminate the random error. The time domain and frequency domain analysis were the main methods to obtain the change regulations. Results showed that the pres

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Cao, Shuliang, Guoyi Peng, and Zhiyi Yu. "Hydrodynamic Design of Rotodynamic Pump Impeller for Multiphase Pumping by Combined Approach of Inverse Design and CFD Analysis." Journal of Fluids Engineering 127, no. 2 (2004): 330–38. http://dx.doi.org/10.1115/1.1881697.

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A combined approach of inverse method and direct flow analysis is presented for the hydrodynamic design of gas-liquid two-phase flow rotodynamic pump impeller. The geometry of impeller blades is designed for a specified velocity torque distribution by treating the two-phase mixture as a homogeneous fluid under the design condition. The three-dimensional flow in the designed impeller is verified by direct turbulent flow analysis, and the design specification is further modified to optimize the flow distribution. A helical axial pump of high specific speed has been developed. To obtain a favorab

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Yang, Fan, Pengcheng Chang, Wenzhu Hu, Beibei Mao, Chao Liu, and Zhongbin Li. "Numerical Study on Pressure Pulsation in a Slanted Axial-Flow Pump Device under Partial Loads." Processes 9, no. 8 (2021): 1404. http://dx.doi.org/10.3390/pr9081404.

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The 30° slanted axial-flow pump device is widely used in agricultural irrigation and urban drainage in plains areas of China. However, during the actual operation process, the 30° slanted axial-flow pump device is prone to vibration, noise, cracks in the blades, and other phenomena that affect the safe and stable operation of the pump device. In order to analyze the flow pressure pulsation characteristics of the 30° slanted axial-flow pump device under different flow conditions, the time–frequency domain analysis method was used to analyze the pressure pulsation of each flow structure of the 3

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Volkov, A. V., A. G. Parygin, A. A. Vikhlyantsev, and A. A. Druzhinin. "On optimization of flow passages of impellers of centrifugal pumps." Safety and Reliability of Power Industry 11, no. 4 (2019): 311–18. http://dx.doi.org/10.24223/1999-5555-2018-11-4-311-318.

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The conventional solution for HAPPs is the use of reversible hydraulic machines operating both in the pump mode as well as in the turbine mode. At the same time, for example, a blade system of a hydraulic machine designed for the pumping mode has a high efficiency. However, in the turbine mode, the energy characteristics of such machine are far from optimal. Considering different patterns of micro- and mini-HAPPs (up to 100 kW) of modular design, it is most appropriate to use a pump and a turbine separately, since the efficiency of hydraulic machines is very important in the case of such low p

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Bogdanovic-Jovanovic, Jasmina, Bozidar Bogdanovic, and Dragica Milenkovic. "Determination of averaged axisymmetric flow surfaces according to results obtained by numerical simulation of flow in turbomachinery." Thermal Science 16, suppl. 2 (2012): 577–91. http://dx.doi.org/10.2298/tsci120426193b.

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In the increasing need for energy saving worldwide, the designing process of turbomachinery, as an essential part of thermal and hydroenergy systems, goes in the direction of enlarging efficiency. Therefore, the optimization of turbomachinery designing strongly affects the energy efficiency of the entire system. In the designing process of turbomachinery blade profiling, the model of axisymmetric fluid flows is commonly used in technical practice, even though this model suits only the profile cascades with infinite number of infinitely thin blades. The actual flow in turbomachinery profile cas

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Han, Wei, Xing Li, Youliang Su, Min Su, Rennian Li, and Yu Zhao. "Effect of Thickness Ratio Coefficient on the Mixture Transportation Characteristics of Helical–Axial Multiphase Pumps." Applied Sciences 10, no. 1 (2020): 345. http://dx.doi.org/10.3390/app10010345.

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With the decrease of oil and gas resources on land, increased attention has been paid to multiphase oil–gas exploitation and the transportation technology represented by oil–gas multiphase pumps. The helical–axial multiphase pump has become the focus of research on oil and gas mixed transmission technology due to its relatively high operating efficiency and adaptability to a wide range of gas volume fraction changes. In order to investigate the thickness variation in the air foil from the hub to the shroud of the blade on the mixture transportation characteristics of the gas–liquid two-phase f

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