Water wave interaction with a bottom-standing surface-piercing porous compound coaxial cylinder DOI
Jiaxiu Cao, Aijun Li,

Chenxu Gu

et al.

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(11)

Published: Nov. 1, 2024

The concept of the integration offshore wind power and ocean ranch represents a development trend intensive use sea. With rise this concept, paper proposes new type porous marine structure. Based on assumptions linearized theory water waves, wave diffraction radiation problems bottom-standing surface-piercing compound coaxial cylinder are studied in paper. Two seabed conditions considered: (a) ideal state, where is impermeable, (b) actual porous. analytical models for hydrodynamic placed impermeable established. solved by using eigenfunction expansion method velocity potentials fluid motion derived. To verify correctness program, present model reduced compared with existing models. After completing verification, effects structural parameters characteristics studied. results indicate that has run-up cylinder, higher effect parameter, smaller cylindrical surface outer inner cylinder. Enlarging parameter radius ratio leads to decreases force, moment, added mass, damping. By changing can be greatly reduced. This study expected provide support engineering design relevant structures.

Language: Английский

Impact of key airfoil blade parameters on the internal flow and vibration characteristics of centrifugal pumps DOI
Xiaoqi Jia, Jie Zhang, Duan Chen

et al.

Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(1)

Published: Jan. 1, 2025

Pressure pulsations and transient fluid forces resulting from unstable internal flow can significantly impact the vibration performance operational stability of centrifugal pumps. This study delves into influence key parameters like airfoil blade thickness, outlet angle, curvature on dynamics characteristics these The research highlights how variations in primarily affect mid-to-rear regions impeller volute region. By optimizing angle blades, radius pressure side profile, maximum thickness within a specified range, demonstrates reduction velocity at outlet, alteration direction, mitigation vertical casing wall. These adjustments effectively decrease strength quantity vortex structures pump, leading to more stable regime. Consequently, this optimization minimizes rotor–stator interaction effects decreased wall, thereby reducing levels. However, deviations optimal parameters, such as coefficient A < 0.46, profile B 0.53, C > 0.11, lead an uneven distribution loads, increased radial forces, vorticity tongue, pulsations, ultimately compromising pump.

Language: Английский

Citations

1
The Optimization of the Rear Guide Vane of a Bulb Tubular Pump Based on Orthogonal Tests DOI Open Access

Kuilin Wang,

Xingmin Meng, Tao Wang

et al.

Processes, Journal Year: 2025, Volume and Issue: 13(1), P. 264 - 264

Published: Jan. 17, 2025

Bulb tubular pumps have been widely used in hydraulic engineering because of their compact structure, easy maintenance, high adaptability, and other characteristics. In this paper, the performance optimization bulb pump South-to-North water diversion project is studied, as well influence design rear guide vane structure on efficiency pump. This study takes a certain type its research object, optimizing vane. Firstly, accuracy numerical simulation method verified using grid convergence analysis model experimentation. The orthogonal experimental to optimize design, range results show that blade wrap angle has most significant head. Finally, under 0° impeller setting were by analysis, optimized was increased 0.7%, 0.88%, 1.1% low flow, respectively. By introducing entropy generation theory for inflow reduction energy loss proven, thus verifying effectiveness optimization. Through optimization, separation fluid phenomenon surface improved, vortex scale reduced, flow field improved extent.

Language: Английский

Citations

0
A potential solution to recover energy from wastewater environment by using the single-channel pump as turbine DOI Creative Commons
Duc-Anh Nguyen, Cong-Τruong Dinh, Gyeong Sung Kim

et al.

Energy, Journal Year: 2025, Volume and Issue: 320, P. 135399 - 135399

Published: March 1, 2025

Language: Английский

Citations

0
Water wave interaction with a bottom-standing surface-piercing porous compound coaxial cylinder DOI
Jiaxiu Cao, Aijun Li,

Chenxu Gu

et al.

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(11)

Published: Nov. 1, 2024

The concept of the integration offshore wind power and ocean ranch represents a development trend intensive use sea. With rise this concept, paper proposes new type porous marine structure. Based on assumptions linearized theory water waves, wave diffraction radiation problems bottom-standing surface-piercing compound coaxial cylinder are studied in paper. Two seabed conditions considered: (a) ideal state, where is impermeable, (b) actual porous. analytical models for hydrodynamic placed impermeable established. solved by using eigenfunction expansion method velocity potentials fluid motion derived. To verify correctness program, present model reduced compared with existing models. After completing verification, effects structural parameters characteristics studied. results indicate that has run-up cylinder, higher effect parameter, smaller cylindrical surface outer inner cylinder. Enlarging parameter radius ratio leads to decreases force, moment, added mass, damping. By changing can be greatly reduced. This study expected provide support engineering design relevant structures.

Language: Английский

Citations

1