Ocean Engineering最新文献_第5页

Characterization of solid-liquid two-phase flow in a canned-motor pump for marine vehicles based on the Euler-Lagrange method 基于欧拉-拉格朗日方法的船用罐装泵固液两相流动表征

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-06-03 DOI: 10.1016/j.oceaneng.2025.121726

Ze Chen , Yandong Gu , Weigang Lu , Lin Zhang , Dongdong Zhu , Zhiqiang Zhou

{"title":"Characterization of solid-liquid two-phase flow in a canned-motor pump for marine vehicles based on the Euler-Lagrange method","authors":"Ze Chen , Yandong Gu , Weigang Lu , Lin Zhang , Dongdong Zhu , Zhiqiang Zhou","doi":"10.1016/j.oceaneng.2025.121726","DOIUrl":"10.1016/j.oceaneng.2025.121726","url":null,"abstract":"<div><div>Canned motor pumps are critical components in marine liquid cooling systems, directly impacting operational safety. However, in practical applications, trace impurities accumulate within the system and prolonged operation may lead to wear of the hydraulic components in canned motor pumps, resulting in performance degradation. Complex internal structures hinder particle motion prediction. This research employs the Euler-Lagrange method to simulate solid-liquid two-phase flow. By comparing simulation and experimental results, the accuracy of the simulation model was confirmed. Furthermore, the Stokes number is introduced to analyze the influence of particle trajectories, solid-liquid two-phase velocity and external characteristics under varying particle counts and sizes. Results show that the Stokes number effectively characterizes particle motion. Increasing particle count or size, particle trajectories exhibit pronounced deflection toward the blade pressure surface and accumulate along the volute periphery. Simultaneously, both the head coefficient and efficiency decrease accordingly. An increasing in particle count or decrease in particle size enhances the likelihood of particles entering the motor gap. Moreover, particle velocity within the flow field increases, whereas the liquid phase velocity remains largely unaffected by particle phase. These findings on solid-liquid two-phase flow characteristics provide insights for optimizing marine cooling system performance and extending service life.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"335 ","pages":"Article 121726"},"PeriodicalIF":4.6,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144195235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural parameter optimization of a semi-submersible floating offshore wind turbine platform under typhoon conditions considering wind-wave interaction 台风条件下考虑风浪相互作用的半潜式浮式海上风力发电平台结构参数优化

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-06-03 DOI: 10.1016/j.oceaneng.2025.121717

Lun He , Ruixing Zhang , Xinmeng Yang , Zenghao Huang , Liqiang An

{"title":"Structural parameter optimization of a semi-submersible floating offshore wind turbine platform under typhoon conditions considering wind-wave interaction","authors":"Lun He , Ruixing Zhang , Xinmeng Yang , Zenghao Huang , Liqiang An","doi":"10.1016/j.oceaneng.2025.121717","DOIUrl":"10.1016/j.oceaneng.2025.121717","url":null,"abstract":"<div><div>Floating offshore wind turbines (FOWTs) in typhoon-prone regions face extreme wind-wave loads and high maintenance costs, necessitating an optimized design that ensures both structural safety and economic efficiency. In this study, a structural parameter optimization framework for semi-submersible platforms considering coupled wind and wave effects is proposed for FOWTs installed in typhoon-prone regions. The framework consists of two main components. First, extreme environmental conditions are characterized by constructing a joint probability distribution of wind speed and significant wave height using the Frank Copula function, based on stochastic simulations of typhoon scenarios. The Kendall return period is introduced to more accurately capture the risk associated with joint extreme events. Second, a multi-objective optimization process is established by combining a multi-objective particle swarm optimization algorithm, a Kriging surrogate model, and the CRITIC decision-making method. Platform mass, nacelle acceleration, and pitch angle are selected as optimization objectives to derive a Pareto-optimal solution set. The framework is applied to the IEA 22-MW FOWT benchmark model with the VolturnUS-S semi-submersible platform. Results show that the optimized design reduces platform mass and mitigates system responses such as nacelle acceleration, pitch motion, and tower damage, thereby enhancing typhoon resistance and fatigue durability.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"335 ","pages":"Article 121717"},"PeriodicalIF":4.6,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144204855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Distributed fixed-time cooperative tracking control of networked uncertain underactuated surface vessels with unmeasured velocity and input saturation 具有不可测速度和输入饱和的网络不确定欠驱动水面舰船的分布式固定时间协同跟踪控制

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-06-03 DOI: 10.1016/j.oceaneng.2025.121681

Hailun Chen, Yujie Xu, Mingyu Fu, Lijing Dong, Xuyu Min

{"title":"Distributed fixed-time cooperative tracking control of networked uncertain underactuated surface vessels with unmeasured velocity and input saturation","authors":"Hailun Chen, Yujie Xu, Mingyu Fu, Lijing Dong, Xuyu Min","doi":"10.1016/j.oceaneng.2025.121681","DOIUrl":"10.1016/j.oceaneng.2025.121681","url":null,"abstract":"<div><div>This article proposes a distributed fixed-time cooperative tracking control scheme based on a hierarchical design framework, consisting of a distributed cooperative estimation layer and a decentralized control layer, to address cooperative tracking control of networked uncertain underactuated surface vessels (USVs) with unmeasured velocity and input saturation. Firstly, in the distributed cooperative estimation layer, a novel distributed fixed-time cooperative observer is designed to rapidly estimate the reference trajectory of the leader. Then, in the decentralized tracking control layer, a fixed-time compound disturbance and velocity observer is designed to address the unmeasured velocity and the compound disturbance (including external environmental disturbances, model parameter uncertainties, and unknown dynamic coupling) for the follower vessel. Furthermore, to address the complexity and error accumulation caused by the repeated differentiation of the virtual velocity control law, a non-smooth filter is designed to enhance system stability. Meanwhile, to avoid the inaccurate estimation of the leader’s reference trajectory at the initial moment, which could result in large control input and trigger input saturation, a fixed-time saturation tracking controller with an auxiliary system signal is designed to rapidly track the leader. Finally, Lyapunov stability analysis and simulation are performed to verify the effectiveness of the proposed cooperative tracking control scheme.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"335 ","pages":"Article 121681"},"PeriodicalIF":4.6,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144195748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamics of wave powered boat considering the heave and pitch motion excited by waves 考虑波浪作用下的起伏和俯仰运动的波浪动力船动力学

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-06-02 DOI: 10.1016/j.oceaneng.2025.121541

Zhanxia Feng , Haibo Wang , Jiayi Zhang , Chao Deng , Zongyu Chang

{"title":"Dynamics of wave powered boat considering the heave and pitch motion excited by waves","authors":"Zhanxia Feng , Haibo Wang , Jiayi Zhang , Chao Deng , Zongyu Chang","doi":"10.1016/j.oceaneng.2025.121541","DOIUrl":"10.1016/j.oceaneng.2025.121541","url":null,"abstract":"<div><div>Wave-powered boats generate forward propulsion by utilizing the heave and pitch motions induced by waves, allowing for potentially unlimited endurance. In this paper, the propulsion and energy utilization performance of tandem hydrofoils mounted on a wave-powered boat considering the coupled heave and pitch excitation is investigated based on a fluid and multibody coupling method. The coupled motion of the tandem hydrofoils is mathematically described, and the propulsion effects of the front and rear hydrofoils, as well as the pressure distribution and the vortex interaction, are examined under the pure heave, pure pitch and coupled heave and pitch excitations. The research indicates that the interplay between heave and pitch motion is critical for maximizing the tandem hydrofoil's propulsion performance, and the pitch motion is the key component responsible for enhancing the energy conversion efficiency of the hydrofoils. The pitch amplitude in coupled excitation affects the phase difference between the movements of the tandem hydrofoils, resulting in an asymmetric thrust and resistance distribution during their upstroke and downstroke, which has the potential to affect the stability of the tandem hydrofoils. Furthermore, an increase in pitch amplitude can reduce the interference of the front hydrofoil's wake on the rear hydrofoil, significantly enhancing both the propulsion performance and energy efficiency of tandem hydrofoils. This study can provide a reference for the design and optimization of the propulsion performance of the wave-powered boats.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"335 ","pages":"Article 121541"},"PeriodicalIF":4.6,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144190222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Progress in large-scale wave flume experimental research in China (2014–2024) 中国大尺度波浪水槽试验研究进展（2014-2024）

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-06-02 DOI: 10.1016/j.oceaneng.2025.121650

Song-Gui Chen , Han-Bao Chen , Zi-Hao Duan , Yang Wang , Jie Huang , Jie-Long Hu , Yi-Na Wang

{"title":"Progress in large-scale wave flume experimental research in China (2014–2024)","authors":"Song-Gui Chen , Han-Bao Chen , Zi-Hao Duan , Yang Wang , Jie Huang , Jie-Long Hu , Yi-Na Wang","doi":"10.1016/j.oceaneng.2025.121650","DOIUrl":"10.1016/j.oceaneng.2025.121650","url":null,"abstract":"<div><div>The large-scale wave flume is a vital facility for coastal and ocean engineering research, offering unique advantages in conducting near-prototype physical model experiments under precisely controlled conditions, effectively mitigating scale effects. Since its establishment in 2014, the Chinese large-scale wave flume has facilitated a series of extensive experimental studies on wave-structure interaction, wave-current-sediment transport and scour protection, and wave-float dynamics response, with the findings successfully applied to practical engineering projects. This paper offers a comprehensive summary of the experiments and research conducted at the Chinese large-scale wave flume over the past decade, aiming to deepen scholars' understanding of its functions and contributions. It also suggests future research directions in coastal structures and sediment transport, coastal engineering disaster prevention and mitigation, maritime transportation, and energy, to further enhance the role of this facility in advancing coastal and ocean engineering research.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"335 ","pages":"Article 121650"},"PeriodicalIF":4.6,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144195229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental study of vertical baffle height on sloshing reduction effects in the rectangular tank 垂直挡板高度对矩形槽内减摇效果的实验研究

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-06-02 DOI: 10.1016/j.oceaneng.2025.121674

Dongxi Liu , Fangyuan Chang , Yujiao Chen

{"title":"Experimental study of vertical baffle height on sloshing reduction effects in the rectangular tank","authors":"Dongxi Liu , Fangyuan Chang , Yujiao Chen","doi":"10.1016/j.oceaneng.2025.121674","DOIUrl":"10.1016/j.oceaneng.2025.121674","url":null,"abstract":"<div><div>This work systematically studies the sloshing suppression effects of baffle height in a 2D rectangular liquid tank. Hundreds of experimental cases for single-layer liquid are carried out. These experiments mainly study the free surface wave height changes and sidewall impact pressure changes in clean and baffled tanks, with the excitation frequency close to the first-mode and third-mode natural frequencies. For the two-layer liquid system, the main research focuses on the motion behaviors of the two kinds of liquid surfaces under the first-mode and third-mode resonant sloshing. Finally, a comparison of the free surface wave movement behaviors in the two-layer liquid and single-layer liquid is carried out. The results show that, whether it is the two-layer liquid or single-layer liquid, in the vicinity of the first-mode natural frequency, the installation of baffle effectively suppresses liquid sloshing, and the suppression effect is proportional to its height. In the vicinity of the third-mode natural frequency, the installation of baffle has no significant effect on the liquid sloshing. Furthermore, for clean and baffled tanks, the free surface movement in single-layer liquid does not differ significantly from that in two-layer liquid.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"335 ","pages":"Article 121674"},"PeriodicalIF":4.6,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144195231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental and numerical analysis of cavitation flow characteristics on surface-piercing swept hydrofoils 掠面水翼空化流动特性的实验与数值分析

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-06-02 DOI: 10.1016/j.oceaneng.2025.121616

Zhijian Xiao , Jie Wang , Renfang Huang , Jian Huang , Yuchang Zhi , Yiwei Wang , Jingzhu Wang

{"title":"Experimental and numerical analysis of cavitation flow characteristics on surface-piercing swept hydrofoils","authors":"Zhijian Xiao , Jie Wang , Renfang Huang , Jian Huang , Yuchang Zhi , Yiwei Wang , Jingzhu Wang","doi":"10.1016/j.oceaneng.2025.121616","DOIUrl":"10.1016/j.oceaneng.2025.121616","url":null,"abstract":"<div><div>This study systematically investigated the effects of the sweep angle on the cavitation dynamics of surface-piercing hydrofoils using integrated experimental and numerical approaches. The key findings revealed that the sweep angle critically governed the cavity topology and shedding mechanisms. As the sweep angle increases, the cavity topology transitions progressively from crescent-shaped to triangular-pyramidal, and the cavity shedding modes evolve sequentially from “impact-type” cloud shedding to “open-type” cloud shedding, and finally to irregular small-scale shedding. These modes are accompanied by a reduction in the fluctuations of the unsteady load amplitudes, indicating a cavitation-suppressing effect induced by the sweep angle. The deflection angle of the re-entrant jet exhibits a negative relationship with the cavity closure line angle, which serves as the primary factor governing the cloud-shedding transition. At a sweep angle of 45°, the cavitation mode shifted from sheet/cloud cavitation to leading-edge vortex cavitation, accompanied by the transformation of cloud shedding into irregular small-scale shedding. Concurrently, the near-cavity flow was restructured from chordwise-dominated patterns to strongly three-dimensional vortical patterns. Spectral energy analysis revealed that increasing sweep angles redistributed the turbulent kinetic energy from large-scale coherent structures to small-scale dissipative eddies, signifying a paradigm shift from inertial energy cascades to viscous dissipation dominance.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"335 ","pages":"Article 121616"},"PeriodicalIF":4.6,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144195230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Novel vibration self-attenuation design of drill-string-like pipes transporting fluid with the enhancement of acoustic black hole effect 增强声黑洞效应的类钻柱输液管振动自衰减设计

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-06-02 DOI: 10.1016/j.oceaneng.2025.121694

Yang Bu , Ye Tang , Dongyang Chen , Tianzhi Yang , Qian Ding

{"title":"Novel vibration self-attenuation design of drill-string-like pipes transporting fluid with the enhancement of acoustic black hole effect","authors":"Yang Bu , Ye Tang , Dongyang Chen , Tianzhi Yang , Qian Ding","doi":"10.1016/j.oceaneng.2025.121694","DOIUrl":"10.1016/j.oceaneng.2025.121694","url":null,"abstract":"<div><div>Drill pipe constitutes a critical element of the drill string, susceptible to failure due to fatigue crack or dynamic instability induced by external excitation and double-gyroscopic effects. This paper proposes a novel type of periodically drill-string-like pipe based on photonic crystal (PC) structure and enhanced acoustic black hole (ABH) effect. The pipe is formulated using the discrete equivalent method and a two-dimensional model of Timoshenko beam theory. Based on the spectral element method (SEM) in conjunction with the transfer matrix method (TMM), a fundamental principle in the study of periodic structures, the band structure, natural frequency, frequency response, and the wave energy distribution of the proposed structure are disclosed. We find the proposed drill-string-like pipe can form low-frequency and broadband band gaps (BGs) to achieve self-suppression characteristics. However, these BGs will decay rapidly with the acceleration of spinning motion. By wrapping a viscoelastic tape of small size at the junction of ABH-pipe cells, the kinetic energy gathered at the edge of the ABH-pipe cell is dissipated effectively, resulting in vibration reduction in the pass band between the second and third BGs. This characteristic further broadens the frequency band of vibration reduction and does not disappear with the increasing spinning speed. The vibration reduction performance of the designed structure under operational conditions is further substantiated through frequency response analysis under stochastic loading scenarios. Thus, the proposed pipes receive the effective vibration self-suppression in the wide spinning-speed range. This work proposes a novel idea for the vibration suppression by the cooperation of BG and structural damping and may provide a reference for the vibration control of drill-string-like pipes in the industry.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"335 ","pages":"Article 121694"},"PeriodicalIF":4.6,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144195233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

New methods for the scour protection around the pile foundation based on oyster reef cover 基于牡蛎礁盖层的桩基周边冲刷防护新方法

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-06-02 DOI: 10.1016/j.oceaneng.2025.121682

Anqi Xie , Xuguang Chen , Xixi Liu , Kehu Li , Su Chen , Fengpeng Zhang

{"title":"New methods for the scour protection around the pile foundation based on oyster reef cover","authors":"Anqi Xie , Xuguang Chen , Xixi Liu , Kehu Li , Su Chen , Fengpeng Zhang","doi":"10.1016/j.oceaneng.2025.121682","DOIUrl":"10.1016/j.oceaneng.2025.121682","url":null,"abstract":"<div><div>Offshore wind turbines usually suffer from severe local scour and environmental challenges. Two novel eco-friendly technologies—oyster reef cover (ORC) and grouting overlaying oyster reef cover (GORC) were proposed as scour countermeasures. In this paper, a series of current scour tests were carried out under the protection of ORC, GORC, riprap, and sacrificial piles. The experimental observations indicated that ORC and GORC could significantly reduce the scour depth. The protection efficiency of ORC and GORC significantly surpasses that of riprap and sacrificial piles. The protection efficiency of ORC is proportional to its extent. When thickness increases, the protection efficiency increases and then decreases. An equation to calculate the protection efficiency of ORC was proposed. The optimal protection parameters were given as <span><math><mrow><msub><msub><mi>W</mi><mrow><mi>O</mi><mi>R</mi></mrow></msub><mi>C</mi></msub><mo>/</mo><mi>D</mi><mo>=</mo><mn>7</mn></mrow></math></span> and <span><math><mrow><msub><msub><mi>t</mi><mrow><mi>O</mi><mi>R</mi></mrow></msub><mi>C</mi></msub><mo>/</mo><mi>h</mi><mo>=</mo><mn>0.187</mn></mrow></math></span>, which can reduce 98.8 % of the scour depth. Mechanistically, the ORC weakens the underflow and horseshoe vortex, while the slurry enhances the seabed scour resistance. Consequently, the GORC can reduce 99.8 % of the scour depth. The GORC showed superior stability compared to ORC, surpassing riprap. The ecological value and economic advantages of ORC and GORC were discussed. The present work provides a reference for the design of scour protection systems that integrate wind power development, ecological restoration, and marine pasture management.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"335 ","pages":"Article 121682"},"PeriodicalIF":4.6,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144190223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The impact of counter-flow fin-shape rods cylinder and its geometric parameters on wind-induced vibration energy harvester 逆流鳍形杆筒及其几何参数对风激振动能量采集器的影响

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-06-02 DOI: 10.1016/j.oceaneng.2025.121714

Jian Qiu , Qiaoya Lv , Hanpei Xu , Dongling Li , Quan Wen

{"title":"The impact of counter-flow fin-shape rods cylinder and its geometric parameters on wind-induced vibration energy harvester","authors":"Jian Qiu , Qiaoya Lv , Hanpei Xu , Dongling Li , Quan Wen","doi":"10.1016/j.oceaneng.2025.121714","DOIUrl":"10.1016/j.oceaneng.2025.121714","url":null,"abstract":"<div><div>Improving the output power and bandwidth of small-scale wind-induced vibration piezoelectric energy harvesters (WIVPEH) is attracting increasing attention. This study proposes a novel design of a counter-flow fin-shaped rod (CFSR), which modifies the cylindrical bluff body through geometric parameter variations, and investigates the influence of these geometric parameters on the performance of WIVPEH. Numerical simulations demonstrate that the CFSR cylinder significantly enhances the performance of the WIVEH, not only achieving a cut-in wind speed of less than 1 m/s but also delivering a substantial energy output (a mechanical power output of 0.26 mW and an energy conversion efficiency of 56 %) at a wind speed of 1 m/s. Under low wind speed conditions ranging from 1 to 8 m/s, the CFSR cylinder maintains a minimum amplitude of 0.5D, greatly extending the operational bandwidth of the energy harvester. Through the study of the geometric parameters, it is found that to optimize the performance of the energy harvester, rods symmetrically installed at 90° on the surface of the cylinder should have a certain depth of groove on the windward side and maintain a specific tilt angle relative to the windward side. The CFSR cylinder at the 60° position more effectively promotes the coupling of vortex-induced vibrations (VIV) and galloping. At the wind speed of 8 m/s, the amplitude reaches 3.45D, and the mechanical energy converted is 8.7 mW. The analysis of frequency response, pressure distribution, and vortex shedding modes demonstrates that the CFSR cylinder design facilitates the coupling of VIV and galloping in wind-induced vibrations. Further analysis of time-history displacement-lift reveals the influence of the geometric parameters on the wind-induced vibrations of the CFSR cylinder bluff body. This study provides valuable insights into the parametric design and optimization of small-scale WIVPEH.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"335 ","pages":"Article 121714"},"PeriodicalIF":4.6,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144195232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0