Dynamic behaviors of multiphase vortex-induced vibration for hydropower energy conversion

L Li, B Lu, W Xu, C Wang, J Wu, D Tan - Energy, 2024 - Elsevier
To satisfy the growing electricity demand, continuous and stable hydropower conversion is
particularly critical in tidal power station operation. In the above industrial application …

Koopman mode analysis on discovering distributed energy transfer of post-transient flutter of a bluff body

Q Zhu, H Li, H Zhu, L Zhou, KT Tse, H Zhang - Ocean Engineering, 2024 - Elsevier
The flutter response of a rectangular cylinder model with an aspect ratio of 5 is investigated
by direct numerical simulation for various Reynolds numbers (Re) and flow angles of attack …

Effect of baffles on efficiency of darrieus vertical axis wind turbines equipped with J-type blades

R Farzadi, A Zanj, M Bazargan - Energy, 2024 - Elsevier
This study investigates the effects of incorporating baffles in J-type bladed vertical axis wind
turbines. The objectives are to analyze the behavior of vortices and their impact on turbine …

Aerodynamic interference effects of bridge-train-like bluff bodies with small flow attack angle

Q Zhu, L Zhou, KT Tse, X Ning, H Zhang - Physics of Fluids, 2024 - pubs.aip.org
This paper employs numerical simulation to examine the impact of variations in flow angle of
attack (α) and low Reynolds number (Re) on the aerodynamic performance of the RC-TLBB …

Vibration-based multiphase flow identification by deep learning for the vertical section of subsea pipelines

W Qiao, H Guo, E Huang, H Chen - Applied Ocean Research, 2024 - Elsevier
Flow pattern identification is critical for the flow assurance of the multiphase flow in the
offshore oil & gas industry. For this purpose, an intelligent flow pattern identification model …

Coherence mode and Floquet analysis on flow past a rectangular cylinder with small angle of attack

L Qiao, Y Zhao, L Zhou, Y Ai, Q Zhu, H Zhang - Physics of Fluids, 2024 - pubs.aip.org
This paper focuses on a typical bluff body, a rectangular cylinder with an aspect ratio of 5,
and quantitatively analyzes the fluid force coefficients and Strouhal number (St) under …

Exploring Vortex–Flame Interactions and Combustion Dynamics in Bluff Body-Stabilized Diffusion Flames: Effects of Incoming Flow Velocity and Oxygen Content

M Chen, M Zhao, Z Wang, X Huang, H Zheng, F Deng - Processes, 2024 - mdpi.com
An afterburner encounters two primary features: high incoming flow velocity and low oxygen
concentration in the incoming airflow, which pose substantial challenges and contribute …

Vortex-induced vibration characteristic and trigger mechanism of semi-closed streamlined box girder trans-sea bridges

Q Duan, C Ma, T Zhang, Z Li - Ocean Engineering, 2024 - Elsevier
In this study, sectional model wind-tunnel tests are conducted to investigate the vortex-
induced vibration (VIV) of semi-closed girders with different aspect ratios. The influencing …

Mitigating the lift of a circular cylinder in wake flow using deep reinforcement learning guided self-rotation

F Zhao, Y Zhou, F Ren, H Tang, Z Wang - Ocean Engineering, 2024 - Elsevier
This study applies deep reinforcement learning (DRL) to reduce lift forces on a circular
object in the wake of another. The proximal policy optimization (PPO) method is utilized to …

Development and validation of a three-dimensional wind-turbine wake model based on high-order Gaussian function

H Wei, Z Zhao, Y Liu, Y Liu, K Ali, H Liu, S Wei, Y Ma… - Ocean …, 2024 - Elsevier
Under natural conditions, the wake velocity distribution approximates top-hat shape in the
near wake center, and a Gaussian shape in the far wake. To improve the prediction …