abdelgali eltayesh

abdelgali eltayesh

Benha University

H-index: 6

Africa-Egypt

Professor Information

University

Benha University

Position

Asst. Lecture

Citations(all)

148

Citations(since 2020)

146

Cited By

16

hIndex(all)

6

hIndex(since 2020)

5

i10Index(all)

3

i10Index(since 2020)

3

Email

University Profile Page

Benha University

Research & Interests List

Wind Turbine

Gas turbine heat transfer

Top articles of abdelgali eltayesh

Experimental Examination for the Electric Power Generation of a Commercial Small-scale Wind Turbine with Modified Aerodynamic Design

Small-scale horizontal axis wind turbines (SSHAWT) have recently gained more interest due to fuel shortages and environmental issues. Generally, they are installed close to the ground in the wind boundary layer, where the velocity is relatively small. This study aims to evaluate the performance of a commercial SSHAWT and to modify rotor design based on wind velocity in the field. The experimental measurements are performed to examine a commercial 1.5 m radius rotor of 1 kW SSHAWT, which was designed at a rated velocity of about 8 m/s. The CFD calculations are performed as well to understand flow characteristics and to verify the experimental measurements. In the experimental procedure, the test of the wind turbine with a permanent magnet synchronous generator showed that at a wind velocity of 5 and 6 m/s, the highest generated power is 163.9 and 306 W corresponding to power coefficients of 0.255 …

Authors

Mahmoud E Hasan,Abdelgalil Eltayesh,Mohamed I Awaad,Hesham M El-Batsh

Journal

Alexandria Engineering Journal

Published Date

2023/2/1

Improving performance of H-Type NACA 0021 Darrieus rotor using leading-edge stationary/rotating microcylinders: Numerical studies

In the current paper, a computational study has been performed to simulate a novel concept in which a fixed/rotating microcylinder is installed upstream of the leading edge of the NACA 0021 airfoil, aiming to enhance the performance of the H-type Darrieus rotor. The idea behind implementing a fixed/rotating microcylinder is to enhance the lift to drag ratio due to increasing near-wall momentum through generated vortices transferring the momentum from the outer flow to the near-wall flow region of the airfoil. Parametric analyses for the microcylinder including its location, size, shape (circular, square and rhombus), and rotation were performed. The commercial Computational Fluid Dynamics (CFD) package ANSYS Fluent was used for solving the Unsteady Reynolds Averaged Navier-Stokes (URANS), and turbulence equations. The code has been based on Finite Volume Method (FVM) with the pressure-based …

Authors

WA El-Askary,Massimiliano Burlando,Mohamed H Mohamed,Abdelgalil Eltayesh

Journal

Energy Conversion and Management

Published Date

2023/9/15

Aerodynamic upgrades of a Darrieus vertical axis small wind turbine

Wind energy conversion is contributing significantly to the new clean energy transition but, up to now, such contribution is mainly driven by large multi-MW windfarms. On the other hand, the recent needs in terms of distributed energy production are revealing a new interest in small-scale wind energy conversion technologies for residential and urban applications. In this context, vertical axis wind turbines (VAWT) are often the most valid choice from the point of view of building integrating possibilities, but it is well known that they suffer a considerable gap in performance when compared to horizontal axis technologies. Based on these premises, in the present work some innovative solutions for improving the performance of a Darrieus vertical axis wind turbine are investigated through numerical and engineering approaches. The investigated interventions include rotor hybridization by the use of an inner Savonius …

Authors

Abdelgalil Eltayesh,Francesco Castellani,Francesco Natili,Massimiliano Burlando,Amr Khedr

Journal

Energy for Sustainable Development

Published Date

2023/4/1

Experimental and numerical investigation for PV cooling by forced convection

A photovoltaic (PV) cell is very sensitive to temperature changes where decreasing temperature plays the main role in the increase of PV electrical efficiency and output power. Therefore, researchers used different techniques for cooling PV modules to avoid immoderate heating PV modules and to decrease the panel temperature, resulting in raising power output, energy efficiency, performance, and life of the panel. In the present work, PV panels are cooled by forced convection. Cooling airflow characteristics and panel temperature distribution are examined using computational fluid dynamics (CFD). In order to evaluate CFD predictions, experimental measurements are obtained in a sunny day on 23rd September 2021 for the period from 10 AM to 4 PM. The experimental measurements are performed on three different arrangements of PV panels. The uncooled panel was considered as the reference case. Two …

Authors

Ahmed Hussien,Abdelgalil Eltayesh,Hesham M El-Batsh

Journal

Alexandria Engineering Journal

Published Date

2023/2/1

Experimental and Numerical Investigation of the Effect of Blades Number on the Dynamic Response of a Small Horizontal-Axis Wind Turbine

The most commonly used method for excavating rock mass is drilling and blasting. Rock mass properties play an important role in blasting design and influence the blasting performance significantly. Rock masses consist essentially of intact rock and discontinuities such as joints. To investigate the effects of joints on the fragmentation by blasting, a series of small-scale experiments with different joint patterns were carried out. Small-scale experiments without joints were also carried out as references. The fragment size distributions based on experimental results were analyzed and compared. Based on the small-scale experiments, numerical models with different joint patterns were generated and run in the LS-DYNA code. In these numerical models, a bonded particle model based on the discrete element method was used to represent the rock to be blasted, a finite element model was adopted to model the remaining rock mass. A particle blast model was employed to describe the detonation process of explosives and the interaction between explosives and the rock mass. A contact model was used to describe the behavior of joints under dynamic loads. A method was developed to obtain the fragment size based on the numerical modeling results. Both experimental and numerical results indicated that the models with joints produced finer fragmentation compared to the model without joints based on the experimental joint patterns.

Authors

Changping Yi,Daniel Johansson,Nikolaos Petropoulos,Håkan Schunnesson

Published Date

2022

Wind flow characterisation over a PV module through URANS simulations and wind tunnel optical flow methods

Despite their simplicity, photovoltaic (PV) modules are often arranged in structures that can be affected by severe and complex wind loads: in this context, the wind flow and the dynamic excitation induced by vortex shedding can introduce unexpected aeroelastic responses. This work introduces a novel wind tunnel application of experimental techniques to address this issue by the use of flow visualisation and video postprocessing, through the optical flow algorithm. Numerical simulations based on unsteady Reynolds-averaged Navier–Stokes (RANS) models are performed and compared against the experimental wind tunnel tests on a PV panel that was also instrumented with pressure taps. A setup with a 65∘ tilt angle was examined because, based on preliminary analyses, it was considered interesting for the free flow–wake transition associated with the dynamic response of the PV panel. The comparison of the experimental and numerical average wind fields supported that the proposed optical flow method was appropriate for characterising the wake of the panel, because there was enough seeding to perform the video postprocessing. Experiments and numerical predictions were compared as regards the average pressure distribution on the panel surfaces, and the average percentage was in the error of 7%; this supports that the URANS method was capable of reproducing the average behaviour of the panel, as well as for the selected configuration, which is particularly challenging. Furthermore, the simulated and measured power spectral densities of the wind speed were compared, and this resulted in the numerical model quite faithfully …

Authors

Francesco Castellani,Abdelgalil Eltayesh,Francesco Natili,Tommaso Tocci,Matteo Becchetti,Lorenzo Capponi,Davide Astolfi,Gianluca Rossi

Journal

Energies

Published Date

2021/10/12

Aerodynamic analysis of a wind-turbine rotor affected by pitch unbalance

The aerodynamics of a rotor with pitch imbalance has been investigated experimentally and numerically in the present work. The comparison of mean velocity and turbulence intensity in the balanced and unbalanced cases indicated that a pitch imbalance modifies both the mean velocity and the turbulent activity; the latter is weakly increased by the imbalance. Spectral analysis indicated that the dynamics of the wake is also affected by the pitch imbalance since the tip vortices loose strength and disorganise more quickly than in the balanced case. The pitch imbalance has, however, a detrimental effect on the power coefficient and it affects the thrust coefficient as well. Only the blade affected by the imbalance shows significant modifications of the applied load, while the other blades operate with the same loading conditions.

Authors

Francesco Castellani,Abdelgalil Eltayesh,Matteo Becchetti,Antonio Segalini

Journal

Energies

Published Date

2021/1/31

Professor FAQs

What is abdelgali eltayesh's h-index at Benha University?

The h-index of abdelgali eltayesh has been 5 since 2020 and 6 in total.

What are abdelgali eltayesh's research interests?

The research interests of abdelgali eltayesh are: Wind Turbine, Gas turbine heat transfer

What is abdelgali eltayesh's total number of citations?

abdelgali eltayesh has 148 citations in total.

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