Hydrodynamic Coefficients of Heave Plates, With Application to Wave Energy Conversion

Brown, Adam; Thomson, Jim; Rusch, Curtis

doi:10.1109/joe.2017.2762258

Cited by 25 publications

(12 citation statements)

References 31 publications

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“…It is common to use the concept of added mass to describe the acceleration reaction of a solid body moving in a fluid. An order-of-magnitude estimate can be obtained by the following formula 8 : …”

Section: Supplementary Informationmentioning

confidence: 99%

A novel flight style allowing the smallest featherwing beetles to excel

Farisenkov

Kolomenskiy

Petrov

et al. 2021

Preprint

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Flight speed generally correlates positively with animal body size [1]. Surprisingly, miniature featherwing beetles can fly at speeds and accelerations of insects three times as large [2]. We show here that this performance results from a previously unknown type of wing motion. Our experiment combines three-dimensional reconstructions of morphology and kinematics in one of the smallest insects, Paratuposa placentis (body length 395 μm). The flapping bristled wing follows a pronounced figure-eight loop that consists of subperpendicular up and down strokes followed by claps at stroke reversals, above and below the body. Computational analyses suggest a functional decomposition of the flapping cycle in two power half strokes producing a large upward force and two down-dragging recovery half strokes. In contrast to heavier membranous wings, the motion of bristled wings of the same size requires little inertial power. Muscle mechanical power requirements thus remain positive throughout the wing beat cycle, making elastic energy storage obsolete. This novel flight style evolved during miniaturization may compensate for costs associated with air viscosity and helps explain how extremely small insects preserved superb aerial performance during miniaturization. Incorporating this flight style in artificial flappers is a challenge for designers of micro aerial vehicles.

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Section: Supplementary Informationmentioning

confidence: 99%

A novel flight style allowing the smallest featherwing beetles to excel

Farisenkov

Kolomenskiy

Petrov

et al. 2021

Preprint

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“…The IMU is used to record the movement, speed, and acceleration more accurately (Brown, Thomson, & Rusch, 2018). The outputs from the load cell, ultrasonic 1, ultrasonic 2, and IMU were recorded through DAQ from Arduino Uno.…”

Section: Methodsmentioning

confidence: 99%

Experimental Studies of Interaction Forces Affect the Position of Vertical Plates on Oscillating Heave Plates with Cylindrical Bodies in Regular Waves

Hadi

Iqbal

Wibawa

et al. 2020

Int. J. Renew. Energy Dev.

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This paper discusses an experimental study of a wave energy converter (WEC) without using reaction from the seabed. The WEC uses buoys and heave plates, which can react to their self-reacting. The interaction force between heave plates and buoys can absorb energy from ocean waves better. The heave plate model affects the output of energy produced. It is presented in this study with variations in the position of upright plates. The research aims to measure the influence of the place of the addition of vertical plates into heave plates on the WEC on the hydrodynamic performance (coefficient of mass increase, drag coefficient, and KC value) and the interaction of the force it produces with the buoy on regular waves. The conclusion is the vertical plate position makes the coefficient of mass added Ca increase with an increasing amount of KC, and an almost linear relationship was observed between them. As the frequency increases, the value of C increases slightly, but it is not clear. Thus, the oscillating frequency has little effect on the mass coefficient of added heave plates with vertical plates. Thus, the change in the vertical plate position has only a powerful effect on KC < 0.75. ©2020. CBIORE-IJRED. All rights reserved

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“…A number of studies seek to identify appropriate drag coefficients using data from PWT experiments on scale model WECs [204][205][206][207][208][209]. The work in [207,208] consider the drag on a heave plate for an HPA and show that identified coefficients have strong intracycle variations, but that constant coefficients can nonetheless result in reasonable model agreement with the data.…”

Section: Viscous Force Termmentioning

confidence: 99%

Efficient Nonlinear Hydrodynamic Models for Wave Energy Converter Design—A Scoping Study

Davidson

Costello²

2020

JMSE

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This review focuses on the most suitable form of hydrodynamic modeling for the next generation wave energy converter (WEC) design tools. To design and optimize a WEC, it is estimated that several million hours of operation must be simulated, perhaps one million hours of WEC simulation per year of the R&D program. This level of coverage is possible with linear potential flow (LPF) models, but the fidelity of the physics included is not adequate. Conversely, while Reynolds averaged Navier–Stokes (RANS) type computational fluid dynamics (CFD) solvers provide a high fidelity representation of the physics, the increased computational burden of these models renders the required amount of simulations infeasible. To scope the fast, high fidelity options, the present literature review aims to focus on what CFD theories exist intermediate to LPF and RANS as well as other modeling options that are computationally fast while retaining higher fidelity than LPF.

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Hydrodynamic Coefficients of Heave Plates, With Application to Wave Energy Conversion

Cited by 25 publications

References 31 publications

A novel flight style allowing the smallest featherwing beetles to excel

A novel flight style allowing the smallest featherwing beetles to excel

Experimental Studies of Interaction Forces Affect the Position of Vertical Plates on Oscillating Heave Plates with Cylindrical Bodies in Regular Waves

Efficient Nonlinear Hydrodynamic Models for Wave Energy Converter Design—A Scoping Study

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