Bio-inspired design for impeller and diffuser optimization to enhance the hydraulic performance of slanted axial flow pumps DOI
Zhongqin Yang, Zheming Tong

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(12)

Published: Dec. 1, 2024

While bionic designs show significant promise in improving the hydraulic performance of fluid machinery, achieving these benefits engineering applications requires meticulous design and optimization. Inspired by biomimetic features humpback whale Atlantic bluefin tuna, we proposed a bio-inspired approach to collaboratively optimize both impeller diffuser slanted axial-flow pumps, incorporating leading-edge (LE) tubercles trailing-edge (TE) serrations. To improve overall performance, several geometric variables LE TE serrations were considered using surrogate model for multi-objective In contrast with baseline case without design, significantly improved under overload conditions, increasing head efficiency up 7.59% 3.47%, respectively. particular, found that wavy shape promoted more gradual pressure distribution around impeller, reducing formation low-pressure regions near suction side lead cavitation decreasing bubble volume 19.40%. shown minimize flow separations vortex shedding, thereby stabilizing patterns transverse between Optimizing resulted 16.38% decrease discharge passage loss compared baseline. Extending serration section helped reduce deviation outlet passage, coefficient 17.46% rated condition. An experimental comparison validated advantage approach.

Language: Английский

Co-adjustable guide vane and diffuser vane to improve the energy generation potential of an axial-flow pump as turbine DOI
Duc-Anh Nguyen, Jin‐Hyuk Kim

Energy, Journal Year: 2024, Volume and Issue: 291, P. 130325 - 130325

Published: Jan. 9, 2024

Language: Английский

Citations

15
Multiobjective hydraulic optimization of the diffuser vane in an axial flow pump DOI
Duc-Anh Nguyen,

Hyeong-Jin Lee,

Sung Kim

et al.

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(7)

Published: July 1, 2024

Separation flows tend to induce a chaotic flow field that eventually leads energy losses and reduced efficiency. The present study performed multiobjective optimization improve the hydraulic performance of an axial pump at best efficiency point (BEP) critical stall based on diffuser vane (DV) geometry. Computational fluid dynamics were applied predict series DV models with design points generated through experiment. Six different surrogate evaluated R-squared criteria. nondominated sorting genetic algorithm II was also employed search for optimum solutions variables. Hydraulic balance between low high rate conditions analyzed velocity triangle. After optimization, total head BEP model increased by 2.341% 2.779%, respectively, compared reference model. Despite minimal changes point, optimal operating range notably expanded in region. Thorough evaluation attributed horseshoe, corner, trailing-edge vortices conducted meridional planes, multiple spans, various cross sections domain. Additionally, formation development turbulent detail transient simulation. Vibration noise caused instabilities characteristics substantially 36.76% 67.342% first higher-harmonic frequencies respectively.

Language: Английский

Citations

4
Multi-Condition Hydraulic Performance Enhancement for a Mixed Flow Pump through Improved AIGV DOI
Yunhao Zheng, Yanjun Li, Fan Zhang

et al.

Energy, Journal Year: 2025, Volume and Issue: unknown, P. 136319 - 136319

Published: April 1, 2025

Language: Английский

Citations

0
Energy performance improvement for a mixed flow pump based on advanced inlet guide vanes DOI
Yunhao Zheng, Yanjun Li, Fan Zhang

et al.

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(9)

Published: Sept. 1, 2024

The sharp decrease in the efficiency of a mixed flow pump within over-load rates presents challenge for coastal drainage pumping stations. To address this issue, two different structures advanced inlet guide vanes (AIGV), full-adjustable (FA) and half-adjustable (HA) structures, are designed to approach better energy performance improvement strategy. Entropy production theory is applied into transient field reveal their influence mechanism on spatial distribution dissipation. primary findings as follows: (1) AIGVs effectively solve mixed-flow pumps rate range, broadening its efficient operation range. (2) axial velocity under effect AIGV explains fluid physics increased efficiency. (3) match between impeller inflow angle blades structure suppresses generation transmission separation pressure side, reduce near-wall novel HA-AIGV obtains control effect.

Language: Английский

Citations

3
Optimum geometry of the Hydraulic Machinery impeller based on the response surface approximation surrogate model DOI Open Access
Duc-Anh Nguyen, Jin‐Hyuk Kim

Journal of Physics Conference Series, Journal Year: 2024, Volume and Issue: 2854(1), P. 012052 - 012052

Published: Oct. 1, 2024

Abstract Centrifugal pumps are known for their simplicity, reliability, and versatility, making them a preferred choice wide range of fluid transfer applications. Improving pump performance has an important meaning in saving energy protecting the environment. Therefore, impeller centrifugal this study was optimized to improve efficiency at best point based on Response Surface Approximate surrogate model Genetic Algorithm. To be able capture separation flow, numerical simulations carried out using Reynolds-averaged Navier-Stokes (RANS) equation Shear Stress Transport (SST k − ω) reattachment modification turbulence with small y+ values all wall surfaces. Experiments base prototype performed confirm reliability simulation results. Two crucial parameters hub selected as design variables. The points these two variables initialized space by Latin Hypercube Sampling method. Using Algorithm, optimum is identified increase 1.445% power consumption decrease 7.37% compared point. After optimization, elimination flow leading edge impeller, arising from mismatch between blade angle angle, obtained successfully resulting noteworthy reduction loss inside passage.

Language: Английский

Citations

0
Bio-inspired design for impeller and diffuser optimization to enhance the hydraulic performance of slanted axial flow pumps DOI
Zhongqin Yang, Zheming Tong

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(12)

Published: Dec. 1, 2024

While bionic designs show significant promise in improving the hydraulic performance of fluid machinery, achieving these benefits engineering applications requires meticulous design and optimization. Inspired by biomimetic features humpback whale Atlantic bluefin tuna, we proposed a bio-inspired approach to collaboratively optimize both impeller diffuser slanted axial-flow pumps, incorporating leading-edge (LE) tubercles trailing-edge (TE) serrations. To improve overall performance, several geometric variables LE TE serrations were considered using surrogate model for multi-objective In contrast with baseline case without design, significantly improved under overload conditions, increasing head efficiency up 7.59% 3.47%, respectively. particular, found that wavy shape promoted more gradual pressure distribution around impeller, reducing formation low-pressure regions near suction side lead cavitation decreasing bubble volume 19.40%. shown minimize flow separations vortex shedding, thereby stabilizing patterns transverse between Optimizing resulted 16.38% decrease discharge passage loss compared baseline. Extending serration section helped reduce deviation outlet passage, coefficient 17.46% rated condition. An experimental comparison validated advantage approach.

Language: Английский

Citations

0