Publications related to Correction of wandering smoothing effects on static measurements of a wing-tip vortex

Physical Mechanism and Flow Control of Tip Vortex Cavitation

Occurrence of cavitation in hydraulic machines is a challenging issue because it is often accompanied with loss of efficiency, noise emissions, vibrations, and erosion damages. Tip vortices, in particular, are an ideal site for the development of cavitatio ...

EPFL2020

A point vortex transportation model for yawed wind turbine wakes

Fernando Porté Agel, Haohua Zong

In this study, stereo particle imaging velocimetry measurements are performed at multiple streamwise locations behind a yawed wind turbine to reveal the formation mechanisms of the counter-rotating vortex pair (CVP), and a point vortex transportation (PVT) ...

CAMBRIDGE UNIV PRESS2020

Dynamic stall on an airfoil undergoing VAWT blade angle of attack variations

Karen Ann J Mulleners, Sébastien Le Fouest, Sabrina Henne

Vertical axis wind turbines have several attractive features in the context of energy production in urban areas, but the inherent aerodynamic complexity of the flow around them has challenged their development on a larger scale. They generally operate at l ...

2020

Analysis of Pitot tube Airflow Velocity Sensor Behavior in Blockage Situations

Ata Jedari Golparvar

Several airplanes crashes throughout the past decades are linked to the failure of the airplane flow velocity sensor known as pitot device or pitot tube. The study of its behavior in blockage, either due to human errors or due to environmental factors, cou ...

IEEE2020

Roll-up region of tip vortex: numerical investigation

Mohamed Farhat, Azin Amini, Matthieu Dreyer, Martino Reclari

The appearance of gas-filled vortices at the tip of hydraulic machines blades is usually associated with increase of losses, vibrations, noise and erosion risk. The understanding of the roll-up region, where the boundary layer on the pressure side crosses ...

IOP PUBLISHING LTD2019

LES investigation of the influence of cavitation on flow patterns in a confined tip-leakage flow

Mohamed Farhat, Huaiyu Cheng

In the present paper, Large Eddy Simulations combined with the Zwart-Gerber-Belamri cavitation model are conducted to study the flow characteristics in a tip-leakage flow. A reasonable agreement is obtained between the numerical and experimental data. With ...

PERGAMON-ELSEVIER SCIENCE LTD2019

Suppressing tip vortex cavitation by winglets

Mohamed Farhat, Ali Amini, Martino Reclari

Despite the numerous remedies prescribed so far, tip vortex cavitation (TVC) remains a major issue in design and operation of diverse applications. In this paper, we experimentally investigate the effectiveness of winglets in suppressing TVC. An elliptical ...

SPRINGER2019

Particle transport at arbitrary timescales with Poisson-distributed collisions

Ambrogio Fasoli, Ivo Furno, Paolo Ricci, Marcelo Baquero Ruiz, Fabian Manke

We develop a model to investigate the time evolution of the mean location and variance of a random walker subject to Poisson-distributed collisions at constant rate. The collisions are instantaneous velocity changes where a new value of velocity is generat ...

2019

The stochastic heat equation: hitting probabilities and the probability density function of the supremum via Malliavin calculus

Fei Pu

In this thesis, we study systems of linear and/or non-linear stochastic heat equations and fractional heat equations in spatial dimension

1

driven by space-time white noise. The main topic is the study of hitting probabilities for the solutions to these ...

EPFL2018

Experimental demonstration of the water-holding property of three-dimensional vortices

When injecting dye into a vertical vortex generated by a commercial magnetic stirrer, one finds that dye remains captured around the vortex core over minutes, while it gets mixed with the water outside this region rather rapidly. Thus, considering its hori ...

2018

Correction of wandering smoothing effects on static measurements of a wing-tip vortex

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Physical Mechanism and Flow Control of Tip Vortex Cavitation

A point vortex transportation model for yawed wind turbine wakes

Dynamic stall on an airfoil undergoing VAWT blade angle of attack variations

Analysis of Pitot tube Airflow Velocity Sensor Behavior in Blockage Situations

Roll-up region of tip vortex: numerical investigation

LES investigation of the influence of cavitation on flow patterns in a confined tip-leakage flow

Suppressing tip vortex cavitation by winglets

Particle transport at arbitrary timescales with Poisson-distributed collisions

The stochastic heat equation: hitting probabilities and the probability density function of the supremum via Malliavin calculus

Experimental demonstration of the water-holding property of three-dimensional vortices

Physical Mechanism and Flow Control of Tip Vortex Cavitation

Particle transport at arbitrary timescales with Poisson-distributed collisions

Analysis of Pitot tube Airflow Velocity Sensor Behavior in Blockage Situations

LES investigation of the influence of cavitation on flow patterns in a confined tip-leakage flow

Experimental demonstration of the water-holding property of three-dimensional vortices

A point vortex transportation model for yawed wind turbine wakes

Suppressing tip vortex cavitation by winglets

The stochastic heat equation: hitting probabilities and the probability density function of the supremum via Malliavin calculus

Dynamic stall on an airfoil undergoing VAWT blade angle of attack variations

Roll-up region of tip vortex: numerical investigation