Modeling of pulsating incoming flow using vortex particle methods to investigate the performance of flutter-based energy harvesters

Chawdhury, Samir; Milani, Dario; Morgenthal, Guido

doi:10.1016/j.compstruc.2018.08.008

Cited by 10 publications

(5 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…gust amplitudes. Chawdhury et al (2018) used the concept of counterrotating vortices in the VPM to simulate pulsating flow, i.e. longitudinal gusts with much longer lengths than the CFD domain, to study the performance of flutter-based energy harvesters.…”

Section: Conceptmentioning

confidence: 99%

Determination of complex aerodynamic admittance of bridge decks under deterministic gusts using the Vortex Particle Method

Kavrakov

Argentini

Omarini

et al. 2019

Journal of Wind Engineering and Industrial Aerodynamics

Self Cite

View full text Add to dashboard Cite

The accurate description of the aerodynamic forces due to free-stream turbulence acting on a stationary bridge deck represents a challenging task. This paper presents a Computational Fluid Dynamics (CFD) approach based on the two-dimensional (2D) Vortex Particle Method (VPM) for simulation of a six-component complex aerodynamic admittance. Deterministic free-stream turbulence is simulated by modeling the wakes of two fictitious pitching airfoils with vortex particles. For out-of-or in-phase sinusoidal oscillations of the airfoils, a longitudinal or vertical sinusoidal gust is obtained along the centerline, respectively. A closed-form solution, based on an existing mathematical model, is deduced to relate the gust amplitudes and vortex particles' circulation. Positioning a section downstream of the particle release locations yields sinusoidal buffeting forces. The complex aerodynamic admittance is then determined as a transfer function between the buffeting forces and the deterministic free-stream turbulence. A verification of the method is performed for the complex Sears' admittance of a flat plate. Finally, the CFD method is validated against wind tunnel tests for a streamlined bridge deck. The results from both, verification and validation, yielded a good agreement. Applications of the presented method are foreseen in the scope of buffeting analyses of line-like structures under the strip assumption.

show abstract

Section: Conceptmentioning

confidence: 99%

Determination of complex aerodynamic admittance of bridge decks under deterministic gusts using the Vortex Particle Method

Kavrakov

Argentini

Omarini

et al. 2019

Journal of Wind Engineering and Industrial Aerodynamics

Self Cite

View full text Add to dashboard Cite

show abstract

“…The section forces for aerodynamic analysis can be calculated by integrating pressures on the surface panels. More details about the solver can be found in [8,9] while its specific implementations can be found in [10,14,15,13,16].…”

Section: A Pseudo-3d Algorithm For Fluid-structure Interaction 21 Flmentioning

confidence: 99%

A Pseudo Three-Dimensional Multi-Slice Numerical Model to Simulate Wind-Induced Vibration of Thin-Walled Roof Systems

Chawdhury¹,

Morgenthal²

2019

Proceedings of the 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

Self Cite

View full text Add to dashboard Cite

show abstract

“…The concept of fluttering plays a vital role in determining the effectiveness of wind energy harvesters. Therefore, researchers have been trying to design and develop wind energy harvesters based on the flutter phenomenon [35,36]. A concept of fluid-structure interaction (FSI) is also getting popular in the designing of piezoelectric energy harvesters.…”

Section: Introductionmentioning

confidence: 99%

Numerical Assessment and Parametric Optimization of a Piezoelectric Wind Energy Harvester for IoT-Based Applications

et al. 2021

View full text Add to dashboard Cite

In the 21st century, researchers have been showing keen interest in the areas of wireless networking and internet of things (IoT) devices. Conventionally, batteries have been used to power these networks; however, due to the limited lifespan of batteries and with the recent advancements in piezoelectric technology, there is a dramatic increase in renewable energy harvesting devices. In this research, an eco-friendly wind energy harvesting device based on the piezoelectric technique is analytically modeled, numerically simulated, and statistically optimized for low power applications. MATLAB toolbox SIMSCAPE is utilized to simulate the proposed wind energy harvester in which a windmill is used to produce rotational motion due to the kinetic energy of wind. The windmill’s rotational shaft is further connected to the rotary to linear converter (RLC) and vibration enhancement mechanism (VEM) for the generation of translational mechanical vibration. Consequently, due to these alternative linear vibrations, the piezoelectric stack produces sufficient electrical output. The output response of the energy harvester is analyzed for the various conditions of piezoelectric thickness, wind speed, rotor angular velocity, and VEM stiffness. It is observed that the electrical power of the proposed harvester is proportional to the cube of wind speed and is inversely proportional to the number of rotor blades. Furthermore, an optimization strategy based on the full factorial design of the experiment is developed and implemented on MINITAB 18.0 for evaluating the statistical performance of the proposed harvester. It is noticed that a design with 3 rotor-blades, having 3 mm piezoelectric thickness, and 40 Nm−1 stiffness generates the optimum electrical response of the harvester.

show abstract

Modeling of pulsating incoming flow using vortex particle methods to investigate the performance of flutter-based energy harvesters

Cited by 10 publications

References 47 publications

Determination of complex aerodynamic admittance of bridge decks under deterministic gusts using the Vortex Particle Method

Determination of complex aerodynamic admittance of bridge decks under deterministic gusts using the Vortex Particle Method

A Pseudo Three-Dimensional Multi-Slice Numerical Model to Simulate Wind-Induced Vibration of Thin-Walled Roof Systems

Numerical Assessment and Parametric Optimization of a Piezoelectric Wind Energy Harvester for IoT-Based Applications

Contact Info

Product

Resources

About