Tip region vortices control based on cutback squealers in a high-loading axial turbine DOI

Kailai Chen,

Weihao Zhang, Yufan Wang

et al.

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(10)

Published: Oct. 1, 2024

The evolution of tip region vortices has a significant influence on the aerodynamic performance turbine. Most studies squealer optimization focused enhancing blockage effect inside clearance but had limited controlling outside clearance. In this paper, both and are controlled based trailing edge suction side cutback in non-cooled results indicate that clearance, scraping vortex plays crucial role reducing leakage. enhances strength vortex, thereby expanding effective range. While leakage breakdown exacerbates its dissipation effects, leading to loss downstream blade. injects greater fluid momentum into increased mixing between jet mainstream. Concurrently, also inhibits breakdown, resulting notable reduction loss. combined impact effectively controls total It been demonstrated there exists an optimal length for rim at edge, which can be determined by setting opening initiation breakdown. aforementioned effects cutbacks prominently observed under different operating conditions, indicates possess good applicability certain This offers valuable guidance control optimization.

Language: Английский

Design optimization of prismatic rib turbulators in a rectangular channel based on multi-objective criterion DOI
Ashutosh Jaiswal, Arshad Afzal

International Journal of Thermal Sciences, Journal Year: 2022, Volume and Issue: 185, P. 108091 - 108091

Published: Dec. 13, 2022

Language: Английский

Citations

10
Multi-Objective Optimization Design of Low Specific Speed Centrifugal Pumps Based on Genetic Algorithm DOI Creative Commons

Yuqin Wang,

Luxiang Zhou,

Shimin Zheng

et al.

IEEE Access, Journal Year: 2023, Volume and Issue: 11, P. 97896 - 97908

Published: Jan. 1, 2023

Aiming at the problems of low working efficiency and high energy loss in operation centrifugal pump, an intelligent algorithm for pump design was proposed. On basis hydraulic design, a multi-objective optimization mathematical model established. A Genetic (GA) designed to optimize major structural parameters optimal combination obtained. Calculation results suggested that optimized significantly augmented lower. The external characteristics test platform indicated head, had been effectively improved after optimization. Under rated conditions, based on GA increased head by 26.92%, boosted 32.28%, diminished 14.38%, which achieved expected goal. Obviously, is better than Particle Swarm Optimization (PSO) improving performance pump. accuracy superiority were verified. This served reference future pumps with consumption.

Language: Английский

Citations

5
Mitigating Measurement Inaccuracies in Digital Twins of Construction Machinery through Multi-Objective Optimization DOI Creative Commons

Misganaw Abebe,

Yonggeun Cho,

Seung Chul Han

et al.

Sensors, Journal Year: 2024, Volume and Issue: 24(11), P. 3347 - 3347

Published: May 23, 2024

The advent of digital twins facilitates the generation high-fidelity replicas actual systems or assets, thereby enhancing design’s performance and feasibility. When developing twins, precise measurement data is essential to ensure alignment between models. However, inherent uncertainties in sensors models lead disparities observed predicted (simulated) behaviors. To mitigate these uncertainties, this study originally proposes a multi-objective optimization strategy utilizing Gaussian process regression surrogate model, which integrates various uncertain parameters, such as load angle, bucket cylinder stroke, arm boom stroke. This employs genetic algorithm indicate Pareto frontiers regarding pressure exerted on boom, arm, cylinders. Subsequently, TOPSIS applied ascertain optimal candidate among identified optima. findings reveal substantial congruence experimental numerical outcomes devised virtual conjunction with TOPSIS-derived parameter configuration.

Language: Английский

Citations

1
Performance improvement of turbo energy recovery device in desalination using flow field simulation and uniform design experiment DOI Creative Commons
Shenghui Wang, Yexiang Xiao, Chengpeng Wang

et al.

Desalination and Water Treatment, Journal Year: 2024, Volume and Issue: unknown, P. 100980 - 100980

Published: Dec. 1, 2024

Language: Английский

Citations

1
Multi-Objective Optimization of Two-Stage Helical Pairs in Helical Hydraulic Rotary Actuator Using Ensemble of Metamodels and NSGA-II DOI Creative Commons
Song Liu, Baoren Li,

Runlin Gan

et al.

Actuators, Journal Year: 2023, Volume and Issue: 12(10), P. 385 - 385

Published: Oct. 13, 2023

This paper aims to optimize the two-stage helical pairs (TSHPs) in a hydraulic rotary actuator (HHRA) terms of volume, transmission efficiency, and maximum contact stress. Volume efficiency can be determined through analytical mathematical models. However, calculating stress necessitates complex time-consuming finite element simulation. To address this issue, method for predicting using an ensemble metamodels (EMs) is proposed, with automated simulation process developed data provision. The superiority EMs validated comparative analysis three stand-alone metamodels. optimization carried out NSGA-II algorithm, including four combinations objectives, global sensitivity analyzed over objectives. results indicate trade-off relationship between volume optimal space. Moreover, considering multiple enhances robustness results. effectively applied design TSHPs provides new idea related design.

Language: Английский

Citations

3
Impact of Transient Gas Injection on Flow-Induced Noise in Centrifugal Pumps DOI Creative Commons
Sheng Wang, Shangfeng Yang, Chunlei Shao

et al.

Journal of Applied Fluid Mechanics, Journal Year: 2023, Volume and Issue: 16(3)

Published: Jan. 9, 2023

The influence of inlet gas volume fractions on flow-induced noise in centrifugal pumps during the transition process injection and generation mechanism this was studied. To end, numerical simulations flow sound fields as well visual experiments field were conducted. variation laws field, frequency-domain time-domain investigated. relationship between pressure pulsation analysed detail. results indicate that it is more reasonable to consider outlet fraction judgement criterion for end process. axial blade passing frequencies are characteristic discrete level at frequency stable early stage Subsequently, they decrease first then increase middle return a state final stage. two exhibit consistency, indicating directly induces change level. Furthermore, can weaken disturbance effect blade.

Language: Английский

Citations

2
Optimization of cavitation characteristics of aviation fuel centrifugal pump inducer based on surrogate model DOI
Jiangfeng Fu, Xianwei Liu, Junjie Yang

et al.

Structural and Multidisciplinary Optimization, Journal Year: 2023, Volume and Issue: 66(11)

Published: Nov. 1, 2023

Language: Английский

Citations

2
Double-Tongue Worm Shell Structure on Plastic Centrifugal Pump Performance Study DOI Creative Commons
Zhi Rao,

Lingfeng Tang,

Zhang Hui

et al.

Applied Sciences, Journal Year: 2023, Volume and Issue: 13(14), P. 8507 - 8507

Published: July 23, 2023

Aiming at the problem of high vibration and wear centrifugal pump tongue, this paper proposes a double-tongue volute structure. Under condition ensuring reliability CFD results, influence various combinations tongue base circle on turbulent kinetic energy radial force impeller is explored. The traditional single-tongue compared with characteristic indexes, unsteady numerical calculation carried out based different working conditions. It concluded that structure can improve pressure fluctuation monitoring points near tongue. results show static gradient velocity middle section reduce maximum value under small flow When 1.0 Q, C-type reaches minimum 3.03 N, which effectively balance part force.

Language: Английский

Citations

2
Interactive multiobjective optimization of an extremely computationally expensive pump design problem DOI Creative Commons
Jana Burkotová, Pouya Aghaei Pour, Tomáš Krátký

et al.

Engineering Optimization, Journal Year: 2023, Volume and Issue: 56(8), P. 1318 - 1333

Published: Sept. 8, 2023

The hydraulic design of a pump is challenging optimization problem. It has multiple conflicting objective functions based on computationally very expensive (16–20 hours) numerical simulations, and simulation failures, meaning that calls can be unsuccessful. In this article, surrogate-assisted evolutionary interactive multiobjective method applied to designing stator. A decision maker's preferences are iteratively incorporated into the solution process advantages an demonstrated in two areas: (1) reducing computation time; (2) finding preferred reflects with low cognitive load. maker was satisfied final reflected his well. Additionally, because he familiar domain problem, provided guided search directions where no failed simulations were encountered. Importantly, could save days time.

Language: Английский

Citations

2
Investigation on the Transient Characteristics of Self-Priming Pumps with Different Hub Radii DOI Creative Commons
Hao Chang, Shiming Hong, Chuan Wang

et al.

Machines, Journal Year: 2021, Volume and Issue: 9(12), P. 311 - 311

Published: Nov. 25, 2021

Self-priming pumps, important fluid equipment, are widely used in the disaster relief and emergency fields. Meanwhile, impeller is only rotational unit of self-priming pump, which plays an essential part power capability pump. In this paper, impellers with different hub radii proposed; by comparing internal flow characteristics, blade surface load, pressure pulsation radial force distribution each scheme, relationship between transient characteristics radius obtained. The results present that a large can not weaken pulsation, distribution, but also improve ability to work on field. Finally, relevant hydraulic experiment conducted, difference calculation below 3%, ensures accuracy results.

Language: Английский

Citations

5