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| 1 | Optimization and design of an aircraft's morphing wing-tip demonstrator for drag reduction at low speeds, Part II- Experimental validation using Infra-Red transition measurement from Wind Tunnel tests显示文摘In the present paper, an ‘in-house' genetic algorithm was numerically and experimentally validated. The genetic algorithm was applied to an optimization problem for improving the aerodynamic performances of an aircraft wing tip through upper surface morphing. The optimization was performed for 16 flight cases expressed in terms of various combinations of speeds, angles of attack and aileron deflections. The displacements resulted from the optimization were used during the wind tunnel tests of the wing tip demonstrator for the actuators control to change the upper surface shape of the wing. The results of the optimization of the flow behavior for the airfoil morphing upper-surface problem were validated with wind tunnel experimental transition results obtained with infra-red Thermography on the wing-tip demonstrator. The validation proved that the 2D numerical optimization using the ‘in-house' genetic algorithm was an appropriate tool in improving various aspects of a wing's aerodynamic performances. | Andreea Koreanschi Oliviu Sugar Gabor Joran Acotto Guillaume Brianchon Gregoire Portier Ruxandra Mihaela Botez Mahmoud Mamou Youssef Mebarki | 2017 | Chinese Journal of Aeronautics2017，30，1： | 10 |
| 2 | Optimization and design of an aircraft's morphing wing-tip demonstrator for drag reduction at low speed, Part Ⅰ–Aerodynamic optimization using genetic, bee colony and gradient descent algorithms显示文摘In this paper, an ‘in-house' genetic algorithm is described and applied to an optimization problem for improving the aerodynamic performances of an aircraft wing tip through upper surface morphing. The algorithm's performances were studied from the convergence point of view, in accordance with design conditions. The algorithm was compared to two other optimization methods,namely the artificial bee colony and a gradient method, for two optimization objectives, and the results of the optimizations with each of the three methods were plotted on response surfaces obtained with the Monte Carlo method, to show that they were situated in the global optimum region. The optimization results for 16 wind tunnel test cases and 2 objective functions were presented. The 16 cases used for the optimizations were included in the experimental test plan for the morphing wing-tip demonstrator, and the results obtained using the displacements given by the optimizations were evaluated. | Andreea Koreanschi Oliviu Sugar Gabor Joran Acotto Guillaume Brianchon Gregoire Portier Ruxandra Mihaela Botez Mahmoud Mamou Youssef Mebarki | 2017 | Chinese Journal of Aeronautics2017，30，1： | 8 |
| 3 | Proportional fuzzy feed-forward architecture control validation by wind tunnel tests of a morphing wing显示文摘In aircraft wing design,engineers aim to provide the best possible aerodynamic performance under cruise flight conditions in terms of lift-to-drag ratio.Conventional control surfaces such as flaps,ailerons,variable wing sweep and spoilers are used to trim the aircraft for other flight conditions.The appearance of the morphing wing concept launched a new challenge in the area of overall wing and aircraft performance improvement during different flight segments by locally altering the flow over the aircraft's wings.This paper describes the development and application of a control system for an actuation mechanism integrated in a new morphing wing structure.The controlled actuation system includes four similar miniature electromechanical actuators disposed in two parallel actuation lines.The experimental model of the morphing wing is based on a full-scale portion of an aircraft wing,which is equipped with an aileron.The upper surface of the wing is a flexible one,being closed to the wing tip;the flexible skin is made of light composite materials.The four actuators are controlled in unison to change the flexible upper surface to improve the flow quality on the upper surface by delaying or advancing the transition point from laminar to turbulent regime.The actuators transform the torque into vertical forces.Their bases are fixed on the wing ribs and their top link arms are attached to supporting plates fixed onto the flexible skin with screws.The actuators push or pull the flexible skin using the necessary torque until the desired vertical displacement of each actuator is achieved.The four vertical displacements of the actuators,correlated with the new shape of the wing,are provided by a database obtained through a preliminary aerodynamic optimization for specific flight conditions.The control system is designed to control the positions of the actuators in real time in order to obtain and to maintain the desired shape of the wing for a specified flight condition.The feasibility and effectiveness of the developed control system by use of a proportional fuzzy feed-forward methodology are demonstrated experimentally through bench and wind tunnel tests of the morphing wing model. | Michel Joёl Tchatchueng Kammegne Ruxandra Mihaela Botez Lucian Teodor Grigorie Mahmoud Mamou Youssef Mebarki | 2017 | Chinese Journal of Aeronautics2017，30，2： | 6 |
| 4 | Groundwater quality assessment using multivariate analysis,geostatistical modeling, and water quality index(WQI): a case of study in the Boumerzoug-El Khroub valley of Northeast Algeria显示文摘In this study,the analytical data set of 26 groundwater samples from the alluvial aquifer of Boumerzoug-E1 khroub valley has been processed simultaneously with Multivariate analysis,geostatistical modeling,WQI,and geochemical modeling.Cluster analysis identified three main water types based on the major ion contents,where mineralization increased from group 1 to group 3.These groups were confirmed by FA/PCA,which demonstrated that groundwater quality is influenced by geochemical processes(water-rock interaction)and human practice(irrigation).The exponential semivariogram model WQI.Groundwater chemistry has a strong spatial structure for Mg,Na,Cl,and NO3,and a moderate spatial structure for EC,Ca,K,HCO3,and SO4.Water quality maps generated using ordinary Kriging are consistent with the HCA and PCA results.All water groups are supersaturated with respect to carbonate minerals,and dissolution of kaolinite and Ca-smectite is one of the processes responsible for hydrochemical evolution in the area. | Oualid Bouteraa Azeddine Mebarki Foued Bouaicha Zeineddine Nouaceur Benoit Laignel | 2019 | Acta Geochimica2019，38，6： | 4 |
| 5 | Numerical Simulation and Control of Two-Phase Flow with Evaporation in a Vertical Tube Submitted to a Conjugate Heat Transfer显示文摘 | Ghazali Mebarki Samir Rahal | 2013 | Journal of Energy and Power Engineering2013，7，7： | 2 |
| 6 | Integrat- ed probabilistic framework for domino effect and risk analysis 显示文摘 | Nguyen Q B Mebarki A Saada R A | 2009 | Advances in Engineering Software2009，，40： | 1 |
| 7 | A proba- bilistic model for the vulnerability of metal plates un- der the impact of cylindrical projectiles 显示文摘 | Mebarki A Nguyen Q B Mercier F | 2007 | Journal of Loss Prevention in the Process Industries2007，20，2： | 1 |
| 8 | Modeling and simulation of the control framework on a flexible manufacturing system显示文摘 | Gertosio C Mebarki N Dussauchoy A | 2000 | Int J Production Economics2000，，64： | 1 |
| 9 | Reliabili- ty analysis of metallic targets under metallic rods im- pact: towards a simplified probabilistic approach 显示文摘 | Mebarki A Nguyen Q B Mercier F | 2008 | Journal of Loss Prevention in the Process Industries2008，21，5： | 1 |
| 10 | Modeling and simulation of control framework on a flexible manufacturing system显示文摘 | GERTOSIO C MEBARKI N DUSSAUCHOY A | 2000 | International Journal of Production Economics2000，64，13： | 1 |
| 11 | Using multi-agent architecture in FMS for dynamic scheduling 显示文摘 | Pierreval H Mebarki N | 1997 | Journal of Intelligent Manufacturing1997，8，1： | 1 |
| 12 | Using multi-agent architecture in FMS for dynamic scheduling显示文摘 | KHALID K HENRI P MEBARKI N | 1997 | Journal of Intelligent Manufacturing1997，16，8： | 1 |
| 13 | Integrated probabilistic framework for domino effect and risk analysis显示文摘 | Nguyen Q B Mebarki A Saada R A | 2009 | Advances in Engineering Software2009，40，9： | 1 |
| 14 | Integratedprobabilistic framework for domino effect and risk analysis 显示文摘 | Nguyen Q B Mebarki A Saada R A | 2009 | Advances in Engineering Software2009，，40： | 1 |
| 15 | A simplified mechanical model to assess the bearing capacity of masonry walls : theory and experimental validation显示文摘 | Mebarki A Bui Q H Ami Saada R | 2009 | Construction and Building Materials2009，23，2： | 1 |
| 16 | Integrated probabilistic framework for domino effect and risk analysis 显示文摘 | Nguyen Q B Mebarki A Saada R A | 2009 | Advances in Engineering Software2009，40，9： | 1 |
| 17 | A probabilistic model for the vulnerability of metal plates under the impact of cylindrical projectiles显示文摘 | Mebarki A Nguyen Q B Mercier F | 2007 | Journal of Loss Prevention in the Process Industries2007，20，2： | 1 |
| 18 | Reliability analysis of metallic targets under metallic rods impact : towards a simplified probabilistic approach 显示文摘 | Mebarki A Nguyen Q B Mercier F | 2008 | Journal of Loss Prevention in the Process Industries2008，21，5： | 1 |
| 19 | Cullin7 : a new gene in- volved in liver carcinogenesis related to metabolic syndrome 显示文摘 | Paradis V Albuquerque M Mebarki M | 2013 | Gut2013，62，6： | 1 |
| 20 | High-speed electrical machines : technologies,trends,anddevelopments显示文摘 | Gerada D Mebarki A Brown N L | 2014 | IEEE Transactions on IndustrialElectronics2014，61，6： | 1 |
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