The Spatio‐Temporal Characteristics of Flow Field Inside a Self‐Priming Pump During the Self‐Priming Process DOI Creative Commons
Yuliang Zhang, Jingfu Li, Yan‐Juan Zhao

et al.

Energy Science & Engineering, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 29, 2024

ABSTRACT In this article, a closed‐loop piping system that includes the self‐priming pump is established and calculated. Two operating processes reflecting real situations are accurately calculated by means of UDF. The vortex identification method, entropy production theory, energy gradient method employed to deeply analyze reveal loss characteristics flow stability. results show in oscillating exhaust stage, greatest during stage process. reflux hole, tongue, outlet section volute have larger loss. Within impeller region, mainly concentrated at inlet outlet; distribution area value clearance wear‐ring. addition, instability region left side significantly than rest locations increases considerably with

Language: Английский

Application of Digital Twins and Metaverse in the Field of Fluid Machinery Pumps and Fans: A Review DOI Creative Commons
Bin Yang, Shuang Yang,

Zhihan Lv

et al.

Sensors, Journal Year: 2022, Volume and Issue: 22(23), P. 9294 - 9294

Published: Nov. 29, 2022

Digital twins technology (DTT) is an application framework with breakthrough rules. With the deep integration of virtual information world and physical space, it becomes basis for realizing intelligent machining production lines, which great significance to processing in industrial manufacturing. This review aims study DTT Metaverse fluid machinery past 5 years by summarizing status pumps fans from perspective through collection, classification, summary relevant literature years. The research found that addition relatively mature applications manufacturing, technologies play a critical role development new pump products are widely used numerical simulation fault detection various other fields. Among fan-type machinery, twin can comprehensively use technologies, such as perception, calculation, modeling, learning, provide efficient smart solutions fan operation detection, power generation visualization, monitoring, monitoring. Still, there some limitations. For example, real-time accuracy cannot fully meet requirements mechanical environment high-precision requirements. However, also have achieved good results. instance, possible achieve significant noise reduction better aerodynamic performance axial improving sawtooth parameters rearranging area. few cases machinery. limited operating real equipment require combination reality DTT. effect still needs further verification.

Language: Английский

Citations

29
Numerical study of the self‐priming process of a prototype pump based on coupled calculations of circulatory system DOI Creative Commons
Yuliang Zhang, Jingfu Li, Yan‐Juan Zhao

et al.

Energy Science & Engineering, Journal Year: 2024, Volume and Issue: 12(7), P. 3008 - 3023

Published: June 2, 2024

Abstract To understand the self‐priming characteristics of a pump, closed‐loop piping system that includes valve, tank, and is established. The acceleration–constant speed operation processes impeller are controlled through user‐defined function ensures computational model startup conditions consistent with real situation. Based on numerical calculations process two different heights, gas–liquid distributions during obtained. results show can be divided into three stages: rapid inhalation, oscillating exhaust, accelerated exhaust. Under time required for inhalation exhaust stages basically same. Thus, difference in mainly concentrated stage. rate at which liquid level rises vertical pipe not proportional to height, change height.

Language: Английский

Citations

3
Transient Hydrodynamic Characteristics of a High-Speed Axial Flow Water-Jet Pump during Variable Speed Process DOI Creative Commons
Rongsheng Zhu, Wenhao Shi,

Gongchang Gan

et al.

Journal of Marine Science and Engineering, Journal Year: 2023, Volume and Issue: 11(10), P. 1965 - 1965

Published: Oct. 11, 2023

To investigate the transient characteristics of high-speed axial flow water-jet pumps during start-up and emergency acceleration as well to analyze how different accelerations affect performance internal flow, k–ω turbulence model SST Zwart cavitation were used perform unsteady simulation on an impeller rotating at a speed 1850. The steady-state numerical method was verified by experimental data, calculation results basically consistent with margin error within 5%, reliable. show that there obvious effect in process variable speed, thrust reached stable state later than speed. buffer times for 1 s, 2 3 s 0.0394 0.0375 0.0282 respectively, 0.5 1.0 1.5 0.0330 0.0273 0.0230 respectively. greater acceleration, more serious rate lag behind impact thrust. Under same time required 19.3~22.6% longer process. During change pump, vortex core area suction surface (SS) first appeared side shroud inlet, increased increase rotational developed toward middle impeller. However, after stabilized, region gradually shrank eventually disappeared. When 0.6 design occurred leading edge (LE) blade, reaching cavitation. is, 6000 r/min, volume fraction 7.32%, 5.84%, 5.32%, 6.86%. 5.04%, 4.23%. 6.7~25% larger Compared under accelerated had smaller core, stronger anti-cavitation ability, actual operation it is advisable use segmented much possible until reached. research findings serve foundation future investigations into operating conditions.

Language: Английский

Citations

2
Special Issue on Optimization and Flow Characteristics in Advanced Fluid Machinery DOI Creative Commons
Chuan Wang

Machines, Journal Year: 2023, Volume and Issue: 11(7), P. 718 - 718

Published: July 6, 2023

This editorial discusses the importance of Advanced Fluid Machinery in sustainable development energy. machinery is crucial many engineering applications, including aerospace, civil, mechanical, and chemical engineering. Special Issue, entitled “Optimization Flow Characteristics Machinery”, features several research articles exploring flow characteristics optimization fluid mechanics. The authors present innovative ideas, methodologies, techniques to advance field papers cover a wide range topics, computational dynamics (CFD), turbulence modeling, heat transfer, multiphase flow, fluid–structure interactions. featured this Issue also investigate relevant hydrodynamic attributes turbomachinery, high-pressure jets, marine propulsion systems, internal combustion engines considerable extent, significantly expanding scope within Issue.

Language: Английский

Citations

1
The Spatio‐Temporal Characteristics of Flow Field Inside a Self‐Priming Pump During the Self‐Priming Process DOI Creative Commons
Yuliang Zhang, Jingfu Li, Yan‐Juan Zhao

et al.

Energy Science & Engineering, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 29, 2024

ABSTRACT In this article, a closed‐loop piping system that includes the self‐priming pump is established and calculated. Two operating processes reflecting real situations are accurately calculated by means of UDF. The vortex identification method, entropy production theory, energy gradient method employed to deeply analyze reveal loss characteristics flow stability. results show in oscillating exhaust stage, greatest during stage process. reflux hole, tongue, outlet section volute have larger loss. Within impeller region, mainly concentrated at inlet outlet; distribution area value clearance wear‐ring. addition, instability region left side significantly than rest locations increases considerably with

Language: Английский

Citations

0