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Altagamoa Al Khames, Main centre of town, end of 90th Street
New Cairo
Egypt
Faculty of Engineering & Technology

Amr Mohamed Metwally Ismaiel

Basic information

Name : Amr Mohamed Metwally Ismaiel
Title: Assistant Professor
Google Schoolar Link
Personal Info: *Name: Amr Muhammad Metwally Ismaiel *Current Occupation: -Assistant Professor in the Faculty of Engineering; FUE

Education

Certificate Major University Year
PhD Mechanical Engineering Kyushu University - Japan 2019
Masters Mechanical Design Engineering Cairo University- Faculty of Engineering 2016
Bachelor Aeronautical and Aerospace Engineering Cairo - Egypt 2012

Researches /Publications

Aeroelastic Analysis for Side-Booms of a Coplanar Twin-Rotor Wind Turbine - 01/0

Amr Mohamed Metwally Ismaiel

Shigeo Yoshida

01/08/2020

As an extension to a previous research made by the authors, this paper represents an aeroelastic analysis for the side-booms supporting the two rotors of a coplanar twin-rotor wind turbine. For a better understanding of the turbine dynamic behavior, the inhouse aeroelastic tool developed by the authors, which is considered as the first approach to study the aeroelasticity of multi-rotor wind turbines, has been extended to model the side-booms and compare three different configurations of the boom size during the analysis. The model is based on deterministic models, where aerodynamic loads are calculated using blade element momentum theory, and virtual work method with a modal approach is used for structure analysis. The three configurations of the side-booms have three different diameters while all other geometrical parameters are kept constant. The bigger the boom diameter, the higher the bending stiffness becomes. It was found that the weight of the rotor is dominant over the fluctuating aerodynamic loads in the in-plane direction, while the deflection is highly affected by the turbulence in the out-of-plane direction. It was also found that the relation between the stiffness and the mean side-boom deflection is of second order, hence, a thorough compromise between weight and strength should be done when designing the side-booms

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Aeroelastic Analysis of a Coplanar Twin-Rotor Wind Turbine - 01/0

Amr Mohamed Metwally Ismaiel

Shigeo Yoshida

01/05/2019

Multi-rotor system (MRS) wind turbines can be a competitive alternative to large-scale wind turbines. In order to address the structural behavior of the turbine tower, an in-house aeroelastic tool has been developed to study the dynamic responses of a 2xNREL 5MW twin-rotor configuration wind turbine. The developed tool has been verified by comparing the results of a single-rotor configuration to a FAST analysis for the same simulation conditions. Steady flow and turbulent load cases were investigated for the twin-rotor configuration. Results of the simulations have shown that elasticity of the tower should be considered for studying tower dynamic responses. The tower loads, and deformations are not straightforward with the number of rotors added. For an equivalent tower, an additional rotor will increase the tower-top deflection, and the tower-base bending moment both in the fore-aft direction will be more than doubled. The tower torsional stiffness becomes a crucial factor in the case of a twin-rotor tower to avoid a severe torsional deflection. Tower natural frequencies are dominant over the flow conditions in regards to the loads and deflections

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Aeroelastic Analysis of a Coplanar Twin-Rotor Wind Turbine - 01/0

Amr Mohamed Metwally Ismaiel

Shigeo Yoshida

01/01/2019

Multi-rotor system (MRS) wind turbines can be a competitive alternative to large-scale wind turbines. In order to address the structural behavior of the turbine tower, an in-house aeroelastic tool has been developed to study the dynamic responses of a 2xNREL 5MW twin-rotor configuration wind turbine. The developed tool has been verified by comparing the results of a single-rotor configuration to a FAST analysis for the same simulation conditions. Steady flow and turbulent load cases were investigated for the twin-rotor configuration. Results of the simulations have shown that elasticity of the tower should be considered for studying tower dynamic responses. The tower loads, and deformations are not straightforward with the number of rotors added. For an equivalent tower, an additional rotor will increase the tower-top deflection, and the tower-base bending moment both in the fore-aft direction will be more than doubled. The tower torsional stiffness becomes a crucial factor in the case of a twin-rotor tower to avoid a severe torsional deflection. Tower natural frequencies are dominant over the flow conditions in regards to the loads and deflections.

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System identification, fuzzy control and simulation of a kite power system with fixed tether length - 01/0

Amr Mohamed Metwally Ismaiel

Tarek N Dief, Uwe Fechner, Roland Schmehl, Shigeo Yoshida, Amr M Halawa

01/05/2018

In wind energy research, airborne wind energy systems are one of the promising energy sources in the near future. They can extract more energy from high altitude wind currents compared to conventional wind turbines. This can be achieved with the aid of aerodynamic lift generated by a wing tethered to the ground. Significant savings in investment costs and overall system mass would be obtained since no tower is required. To solve the problems of wind speed uncertainty and kite deflections throughout the flight, system identification is required. Consequently, the kite governing equations can be accurately described. In this work, a simple model was presented for a tether with a fixed length and compared to another model for parameter estimation. In addition, for the purpose of stabilizing the system, fuzzy control was also applied. The design of the controller was based on the concept of Mamdani. Due to its robustness, fuzzy control can cover a wider range of different wind conditions compared to the classical controller. Finally, system identification was compared to the simple model at various wind speeds, which helps to tune the fuzzy control parameters

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Study of turbulence intensity effect on the fatigue lifetime of wind turbines - 01/0

Amr Mohamed Metwally Ismaiel

Shigeo Yoshida

01/03/2018

In this paper, the effect of variable turbulence intensities on the fatigue lifetime of wind turbines is studied. Time series aeroelastic simulations were carried on the NREL WindPACT 1.5 MW upwind turbine using an open source software FAST. Two turbulence models-von Karman and Kaimal-were used with four different turbulence intensities (1%, 10%, 25%, and 50%). The time series data of the loads were post processed using the tool MLife to estimate the fatigue lifetime of the wind turbine. It is found that high turbulence intensities increase the extreme loadings on the turbine, increase damage equivalent loads, and decrease the estimated lifetime. It is also found that both turbulence models’ results agree, there is no remarkable difference between them in the fatigue behavior of the turbine, and gave very close results

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Fatigue Analysis of an Optimized HAWT Composite Blade - 01/0

Amr Mohamed Metwally Ismaiel

Sayed Mohamed Metwalli, Basman Mohamed Nabil Elhadidi, Shigeo Yoshida

01/09/2017

This work studies the fatigue behavior of an optimized composite wind turbine blade of a previous research. It employs methodologies using classical theory, as well as probabilistic and numerical techniques for the study of the blade. Modal Analysis showed that the blade is safe from resonance phenomenon. Fatigue analysis showed that the service lifetime of the blade until failure is about 17 years for the turbine operating speed of 36 rpm, and about 15.8 years for the operating speed of 47 rpm, which are less than the expected life of 20 years by 14.7% and 20.9% respectively

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Awards

Award Donor Date
Best Poster Presentation at CSS-EEST 20 Busan; South Korea 2018
Best Oral Presentation at IEICES 3 Fukuoka; Japan 2017
Best Oral Presentation at CSS-EEST18 Shanghai; China 2016
Best Graduation Project in the syndicate of Engineering Syndicate of Engineering; Egypt 2012
Best Mechanical Engineering Project in EED IEEE; Egypt 2012

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