scispace - formally typeset
Search or ask a question
Author

Simone Michele

Other affiliations: University of Rome Tor Vergata
Bio: Simone Michele is an academic researcher from Loughborough University. The author has contributed to research in topics: Nonlinear system & Eigenfunction. The author has an hindex of 8, co-authored 14 publications receiving 142 citations. Previous affiliations of Simone Michele include University of Rome Tor Vergata.

Papers
More filters
Journal ArticleDOI
TL;DR: In this paper, a mathematical model is developed to analyze the hydrodynamics of a novel oscillating water column (OWC) in a hybrid wind-wave energy system, which has a coaxial cylindrical structure in which the internal cylinder represents the mono-pile of an offshore wind turbine while the external cylinder has a skirt whose scope is to guide the wave energy flux inside the chamber.

45 citations

Journal ArticleDOI
TL;DR: In this paper, a wave energy converter made of an array of Q neighbouring floating flap gates with finite thickness in front of a straight vertical wall in constant depth is considered, and the authors show that large values of the exciting torque on the gates can be obtained by tuning the wall distance with the resonance of the natural modes of the array; this yields large power extraction for a wide range of frequencies.

26 citations

Journal ArticleDOI
TL;DR: In this article, the authors considered a flap-gate farm with a series of P arrays, each made by Q neighboring flap gates, in an infinitely long channel and determined their eigenfrequencies and modal forms.

23 citations

Journal ArticleDOI
TL;DR: In this paper, the effect of gate surface curvature on the nonlinear behaviour of an array of gates in a semi-infinite channel is analyzed. But the effects of surface curvatures are not always beneficial as previously thought.
Abstract: We analyse the effect of gate surface curvature on the nonlinear behaviour of an array of gates in a semi-infinite channel. Using a perturbation-harmonic expansion, we show the occurrence of new detuning and damping terms in the Ginzburg-Landau evolution equation, which are not present in the case of flat gates. Unlike the case of linearised theories, synchronous excitation of trapped modes is now possible because of interactions between the wave field and the curved boundaries at higher orders. Finally, we apply the theory to the case of surging wave energy converters (WECs) with curved geometry and show that the effects of nonlinear synchronous resonance are substantial for design purposes. Conversely, in the case of subharmonic resonance we show that the effects of surface curvature are not always beneficial as previously thought.

23 citations

Journal ArticleDOI
TL;DR: A second-order nonlinear theory for an array of curved flap-type wave energy converters (WECs) in open sea, excited by oblique incident waves is presented in this paper.

22 citations


Cited by
More filters
Book
01 Jan 1985
TL;DR: Theoretical Description of Random Sea Waves Statistical Theory of Irregular Waves Techniques of Random Wave Analysis 2D Computation of Wave Transformation with Random Breaking and Nearshore Currents Statistical Analysis of Extreme Waves Prediction and Control of Beach Deformation Processes.
Abstract: Evolution of Design Method Against Random Waves Statistical Properties and Spectral of Sea Waves Transformation and Deformation of Random Sea Waves Design of Breakwaters Design of Coastal Dikes and Seawalls Probabilistic Design of Harbor Facilities Harbor Tranquility and Vessel Mooring Hydraulic Model Tests with Random Waves Theoretical Description of Random Sea Waves Statistical Theory of Irregular Waves Techniques of Random Wave Analysis 2D Computation of Wave Transformation with Random Breaking and Nearshore Currents Statistical Analysis of Extreme Waves Prediction and Control of Beach Deformation Processes.

436 citations

01 Sep 1985
TL;DR: In this paper, some useful formulas are developed to evaluate integrals having a singularity of the form (t-x) sup-m, m, m or = 1.
Abstract: In this paper some useful formulas are developed to evaluate integrals having a singularity of the form (t-x) sup-m, m or = 1 Interpreting the integrals with strong singularities in Hadamard sense, the results are used to obtain approximate solutions of singular integral equations A mixed boundary value problem from the theory of elasticity is considered as an example Particularly for integral equations where the kernel contains, in addition to the dominant term (t,x) sup-m, terms which become unbounded at the end points, the present technique appears to be extremely effective to obtain rapidly converging numerical results

377 citations

Journal ArticleDOI
TL;DR: In this paper, a theoretical model is developed based on the linear potential flow theory and eigenfunction matching method to evaluate the hydrodynamic performance of an array of OWCs installed along a vertical straight coast.
Abstract: The integration of oscillating water column (OWC) wave energy converters into a coastal structure (breakwater, jetty, pier, etc.) or, more generally, their installation along the coast is an effective way to increase the accessibility of wave power exploitation. In this paper, a theoretical model is developed based on the linear potential flow theory and eigenfunction matching method to evaluate the hydrodynamic performance of an array of OWCs installed along a vertical straight coast. The chamber of each OWC consists of a hollow vertical circular cylinder, which is half embedded in the wall. The OWC chambers in the theoretical model may have different sizes, i.e. different values of the radius, wall thickness and submergence. At the top of each chamber, a Wells turbine is installed to extract power. The effects of the Wells turbine together with the air compressibility are taken into account as a linear power take-off system. The hydrodynamic and wave power extraction performance of the multiple coast-integrated OWCs is compared with that of a single offshore/coast-integrated OWC and of multiple offshore OWCs. More specifically, we analyse the role of the incident wave direction, chamber size (i.e. radius, wall thickness and submergence), spacing between OWCs and number of OWCs by means of the present theoretical model. It is shown that wave power extraction from the coast-integrated OWCs for a certain range of wave conditions can be significantly enhanced due to both the constructive array effect and the constructive coast effect.

93 citations

Journal ArticleDOI
TL;DR: A review of synergetic technologies with the potential for hybridization and/or co-location with wave energy converters is presented and it is found that mutual gains can be attained from this complementary approach.
Abstract: Within the scope of a changing energy market, wave energy has yet to reach a level of commercial viability that enables it to become competitive with alternative energy sources, both renewable and non-renewable. Despite the well-known advantages inherent to the resource, there are several challenges that must be overcome before wave energy gains a relevant share of the global energy market. While near-commercial stages of development are still outside the reach of most wave energy converters, it is important to find new perspectives that facilitate the development process and improve the chances of a successful deployment and operation. In this paper, a review of synergetic technologies with the potential for hybridization and/or co-location with wave energy converters is presented. Potential applications of wave energy conversion devices, within the context of nearshore and offshore niche markets that minimize/eliminate, respectively, mainland grid connection and inherent costs are also discussed. It is found that mutual gains can be attained from this complementary approach, namely in terms of infrastructure sharing, critical component protection, introduction of a beneficial shielding effect, energy storage upgrading, coastal erosion mitigation and electricity supply to various marine mobile platforms for different offshore and nearshore activities, amongst others.

78 citations