Research on the tandem arrangement of the ducted horizontal-axis tidal turbine

Feng, Bo; Liu, Xiaodong; Ying, You; Si, Yulin; Zhang, Dahai; Qian, Peng

doi:10.1016/j.enconman.2022.115546

Cited by 18 publications

(3 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This interference has both detrimental and beneficial impact on turbine performance in multi-row arrays [3,4]. The disadvantages focus on the power efficiency as well as load fluctuation of turbines located in the wake zone, particularly in near wake, with pronounced momentum decrease and turbulence intensity increase induced by the blade tip vortices, hub vortex and shear layer instability, etc [5,6]. To improve the overall power production capability of turbine array, close lateral interval between adjacent turbines is utilized to amplify micro-scale interactions, restricting free expansion of gap flow with high velocity, and to gain more power [6,7].…”

Section: Introductionmentioning

confidence: 99%

Interactions between Approaching Flow and Hydrokinetic Turbines in a Staggered Layout

Chen

Lin

Liang

2023

Preprint

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Interactions between Approaching Flow and Hydrokinetic Turbines in a Staggered Layout

Chen

Lin

Liang

2023

Preprint

View full text Add to dashboard Cite

“…Djebarri et al [26,27] numerically analyzed the electromagnetic characteristics of a flux PM generator on RDT. Feng et al [28] experimentally and numerically tested the performance of a RDT array. In addition, the OpenHydro turbine is one of few examples of an industrial RDT [29].…”

Section: Introductionmentioning

confidence: 99%

A Numerical Performance Analysis of a Rim-Driven Turbine in Real Flow Conditions

Song

Kang

2022

JMSE

View full text Add to dashboard Cite

The tidal turbines represent a new frontier for extracting energy from tides source. Despite the technology being mature, new solutions aimed at improving performance, reliability with reduced environmental impact, manufacturing and installation costs are currently under investigation. The Rim-driven turbine (abbreviated as RDT) was recently proposed. A RDT resembles a ducted turbine (abbreviated as DT), as both contain blades and a duct. The present study aims at investigating the detail performance and flow field of a RDT in a real flow based on the China Zhaitang Island’s tidal current data. To show the difference between the RDT and DT, simulations are also performed on the corresponding DT. It is found that the power and thrust for the two configurations exhibit time-periodic behavior that is consistent with the wave frequency. At axial flow, the fluctuation amplitude on the power and thrust increase with the increase of tip speed ratio. The RDT has higher power output when operating at lower tip speed ratio and has a potential reduction in flow resistance and disturbance with respect to the DT. At yawed flow, the fluctuation amplitude on the power and thrust decrease with the increase of yaw angle. The RDT has less capable of compensating the effect of yawed inflow in reducing the power than the DT at larger yaw angle. In addition, the power and thrust generates micro-amplitude fluctuation integrated into the main waveform, which the frequency is consistent with the turbine rotation frequency. The wake characteristics analysis reveals that the yawed flow field is more turbulent, and the two configurations suffer strong unsteady flow separation along the whole span. Strong interactions are observed between the rotor’s main wake and the duct’s upper wake. The yaw angle primarily determines the downstream wake deflection direction and significantly changes the wake shape and vortex structures. Meanwhile, the wake flow is found to recover more quickly at larger yaw angle. Besides, due to the open-center of RDT, a part free-stream flow is allowed to travel through and forms an obvious high velocity zone. The presence of open-center of RDT has avoided the low velocity zone, improved the wake structure and accelerated wakes recover, which seems to give an advantageous effect in operating a RDT.

show abstract

“…A viable solution is to extract ocean energy, which is inexhaustible and pollution-free with a potential of 20,000 to 92,000 TWh/year [71]. Although ocean energy is yet to be exploited at a significant scale, diverse conversion mechanisms have been proposed, which include wave energy converters [72][73][74], tidal turbines [75][76][77][78], oscillating cylinders [79], thermal [80,81],…”

Section: Flapping-foil Based Hydrokinetic Convertersmentioning

confidence: 99%

Constructive foil-wake Interactions of tandem flapping hydrofoils for propulsion and energy harvesting

Wang

View full text Add to dashboard Cite

First and foremost, I would like to express my heartfelt gratitude to my supervisor, Assistant Professor Ng Bing Feng, for his invaluable advice, continuous support, and patience during the course of my PhD degree. Prof. Ng has provided effective guidance on my research and academic writing. His immense knowledge and plentiful experience have encouraged me in all the time of my academic research.Moreover, I would like to thank Prof. Lua Kim Boon, for his guidance and thought-provoking discussions, which are influential to my research. I also thank Dr.

show abstract

Research on the tandem arrangement of the ducted horizontal-axis tidal turbine

Cited by 18 publications

References 57 publications

Interactions between Approaching Flow and Hydrokinetic Turbines in a Staggered Layout

Interactions between Approaching Flow and Hydrokinetic Turbines in a Staggered Layout

A Numerical Performance Analysis of a Rim-Driven Turbine in Real Flow Conditions

Constructive foil-wake Interactions of tandem flapping hydrofoils for propulsion and energy harvesting

Contact Info

Product

Resources

About