A CFD simulation of wave loads on a pile-type oscillating-water-column device

Huang, Zhenhua; Xu, Conghao; Huang, Shijie

doi:10.1007/s42241-019-0015-3

Cited by 23 publications

(4 citation statements)

References 16 publications

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“…Ning et al (2016) showed that horizontal wave forces in OWCs increase with the wave height and decrease with the wave length [44]. Rezanejad et al (2017) observed that the influence of the wave height on the performance of the OWC device is of lesser importance than the influence of the wave period [45], and Huang et al (2019) reported that horizontal and vertical wave forces are less sensitive to the wave period, but increase with the wave height [46].…”

Section: Influence Of Wave Characteristicsmentioning

confidence: 99%

Review of the Influence of Oceanographic and Geometric Parameters on Oscillating Water Columns

Juan

Valdecantos

Esteban

et al. 2022

JMSE

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Wave energy is one of the most powerful sources of energy on our planet, but its exploitation is difficult. Much current research on renewable energy is focused on how to harness ocean energy. However, wave energy converter (WEC) technology is still immature and how to reach high levels of efficiency is still unknown. In coming years, this field is likely to reach a high level of development, so it is important to continue research on the improvement of the performance of these devices. One of the most important wave energy converters is the oscillating water column (OWC). The main difficulty of OWCs is that they have to provide good rates of hydrodynamic efficiency for many different types of sea states (different periods, heights, wavelengths, etc.). The other big concern is the optimization of the geometric parameters of the device. This research paper is focused on these two big concerns: how oceanographic parameters affect the hydrodynamic behavior of an OWC and its geometric optimization. Different studies about how wave and geometric characteristics affect the performance of an OWC are reviewed and relationships between these and the hydrodynamic performance of an OWC are finally outlined and summed up.

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Section: Influence Of Wave Characteristicsmentioning

confidence: 99%

Review of the Influence of Oceanographic and Geometric Parameters on Oscillating Water Columns

Juan

Valdecantos

Esteban

et al. 2022

JMSE

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“…Fortunately, the OWC power plant was not yet under operation because the operational license had not been granted, but still it reflected that no matter how carefully the exerting forces could be calculated, the response and safety of the chamber structure was the essential matter for an OWC wave energy converting system. Some other studies also were concerned about the safety of operation of an OWC conversion system but only very few focused on the structural safety [15]. That study considered the safety for an OWC integrated into a bottom-sitting pile structure (an OWC pile).…”

Section: Development Of An Oscillating Water Column (Owc) Wave Energy...mentioning

confidence: 99%

Structural Safety Analysis for an Oscillating Water Column Wave Power Conversion System Installed in Caisson Structure

Lee

Lin

et al. 2020

JMSE

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In this study, an alternative way, a so called caisson based type of oscillating water column (OWC) wave energy converting system was proposed to capture and convert wave energy. Since the caisson structure is constructed to protect the coastal line or ports, it is important to know if a built-in associated OWC system will be a burden to affect the safety of the structure or it is safe enough to work appropriately. In this study, three steps of structural analysis were performed: firstly, the analysis for the structural safety of the whole caisson structure; secondly, performing the mechanic analysis for the chamber of the associated OWC system; and finally, performing the analysis for the wave induced air-pressure in the chamber under the design conditions of a local location during the wave-converting operation. For the structural safety analysis, a typical structural model associated with caisson breakwater was built and analyzed while the shape of the structure, material applied to the construction, and associated boundary conditions were all set-up according to the wave and structures. The motion and the strain distribution of the caisson structure subjected to designated waves of 50-year return period were evaluated and compared to the safety requirement by the code. For the analysis of the energy converting performance, a numerical method by using a theorem of unsteady Navier–Stokes equations in conservation form was used to analyze the proposed OWC model when the structure subjected to an incident wave of a 10-year return period.

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“…A deep understanding of the hydrodynamic loads on vertical piles induced by waves and currents is very important for designing marine structures such as sea-crossing bridges, offshore platforms, and wind farms [1][2][3][4][5]. As marine engineering develops gradually into deeper water and its scale expands continuously, pile foundations must withstand the huge forces associated with strong wave and current actions, which are the key control factors in the design and construction of such engineering structures.…”

Section: Introductionmentioning

confidence: 99%

Wave-Current Loads on a Super-Large-Diameter Pile in Deep Water: An Experimental Study

Hong,

Lyu,

Wang

et al. 2023

Applied Sciences

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Recently, the diameters and construction water depths of the pile foundations of planned and newly built sea-crossing bridges have been increasing greatly. Hydrodynamic loads are the key control factors in the design of super-large-diameter piles. However, most of the previous studies focused on the inline force on the pile with a small diameter, and there were few cases to consider the impact of the transverse force on the hydrodynamic load of the pile under wave-current actions. In this study, to understand the hydrodynamic loads on such deep-water super-large-diameter piles, the prototype was one of the 6.3-m piles used in the Xihoumen Rail-cum-Road Bridge, and 1:60-scale model tests were carried out in an experimental tank, with the actions of regular waves and waves combined with currents used as loads. The influence of the current velocity and static wave height on the inline and transverse forces on the pile was measured and analyzed. The experimental results indicate that with increasing current velocity, the fluctuation characteristics of the wave-current-induced inline and transverse forces change significantly, and their peak values increase obviously compared to those induced by only waves. In particular, the peak transverse force increases tens of times and can become equivalent to the inline force. The modified Morison formula and Kutta–Joukowski formula are used to derive the correlations between the drag coefficient CD, inertia coefficient CM, lift coefficient CL, and redefined Keulegan–Carpenter number KC*. Under wave-current action, the transverse force contributes quite significantly to the hydrodynamic load on a super-large-diameter pile, making it easier to trigger extreme structural loads. The results presented herein are an important reference for the engineering designs of such super-large-diameter piles.

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A CFD simulation of wave loads on a pile-type oscillating-water-column device

Cited by 23 publications

References 16 publications

Review of the Influence of Oceanographic and Geometric Parameters on Oscillating Water Columns

Review of the Influence of Oceanographic and Geometric Parameters on Oscillating Water Columns

Structural Safety Analysis for an Oscillating Water Column Wave Power Conversion System Installed in Caisson Structure

Wave-Current Loads on a Super-Large-Diameter Pile in Deep Water: An Experimental Study

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