A5045955868- Wind and Air Flow Studies
- Wind Energy Research and Development
- Fluid Dynamics and Vibration Analysis
- Aerodynamics and Fluid Dynamics Research
- Heat Transfer Mechanisms
- Turbomachinery Performance and Optimization
- Fluid Dynamics and Turbulent Flows
- Photovoltaic System Optimization Techniques
- Solar Thermal and Photovoltaic Systems
- Combustion and flame dynamics
Benha University
2013-2023
Wind energy conversion is contributing significantly to the new clean transition but, up now, such contribution mainly driven by large multi-MW windfarms. On other hand, recent needs in terms of distributed production are revealing a interest small-scale wind technologies for residential and urban applications. In this context, vertical axis turbines (VAWT) often most valid choice from point view building integrating possibilities, but it well known that they suffer considerable gap...
A photovoltaic (PV) cell is very sensitive to temperature changes where decreasing plays the main role in increase of PV electrical efficiency and output power. Therefore, researchers used different techniques for cooling modules avoid immoderate heating decrease panel temperature, resulting raising power output, energy efficiency, performance, life panel. In present work, panels are cooled by forced convection. Cooling airflow characteristics distribution examined using computational fluid...
This study presents experimental and numerical investigation for the effect of number blade (solidity) on power thrust coefficients a small-scale horizontal-axis wind turbine HAWT. An set- up was installed rotors with different blades, i.e. three, five six, at tip speed ratios, in closed-circuit open-test section tunnel. The obtained results from CFD simulations were performed to compare data measurements. In addition, there is lack information presented rotor flow field HAWT like vertical...
Blockage corrections for the experimental results obtained a small-scale wind turbine in tunnel are required order to estimate how same would perform real conditions. The blockage is defined as ratio of swept area cross-section area. Experimental measurements power coefficient were performed on horizontal-axis with two rotors diameter equal 2 m and different numbers blades, namely three five. Measurements carried out tip speed ratios closed circuit open test section University Perugia...
The aerodynamics of a rotor with pitch imbalance has been investigated experimentally and numerically in the present work. comparison mean velocity turbulence intensity balanced unbalanced cases indicated that modifies both turbulent activity; latter is weakly increased by imbalance. Spectral analysis dynamics wake also affected since tip vortices loose strength disorganise more quickly than case. has, however, detrimental effect on power coefficient it affects thrust as well. Only blade...
Small-scale horizontal axis wind turbines (SSHAWT) have recently gained more interest due to fuel shortages and environmental issues. Generally, they are installed close the ground in boundary layer, where velocity is relatively small. This study aims evaluate performance of a commercial SSHAWT modify rotor design based on field. The experimental measurements performed examine 1.5 m radius 1 kW SSHAWT, which was designed at rated about 8 m/s. CFD calculations as well understand flow...
Despite their simplicity, photovoltaic (PV) modules are often arranged in structures that can be affected by severe and complex wind loads: this context, the flow dynamic excitation induced vortex shedding introduce unexpected aeroelastic responses. This work introduces a novel tunnel application of experimental techniques to address issue use visualisation video postprocessing, through optical algorithm. Numerical simulations based on unsteady Reynolds-averaged Navier–Stokes (RANS) models...
This study presents experimental and numerical investigation for three-dimensional heat transfer characteristics in a turbine blade. An setup was installed with cascade of five-blade channels. Blade measurements were performed the middle channel under uniform flux boundary conditions. Heat supplied to blades using twenty-nine electric heating strips cemented vertically on outer surface blades. Distributions coefficient obtained at three levels through blade height by measuring temperature...
The new energy scenario is rising a strong interest towards the distributed production from renewable sources; among them, wind seems to be one of most interesting and at same time critical due challenges conversion technology. Operation small systems generally very complex extremely variable regime operation high turbulent wind, so that deep knowledge dynamic response such devices crucial not only for optimising their performances but also make them comfortable used in residential areas....