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您的检索式：作者名="N.I.Ismail"
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| 1 | Optimization of aerodynamic efficiency for twist morphing MAV wing显示文摘Twist morphing(TM) is a practical control technique in micro air vehicle(MAV) flight.However, TM wing has a lower aerodynamic efficiency(CL/CD) compared to membrane and rigid wing. This is due to massive drag penalty created on TM wing, which had overwhelmed the successive increase in its lift generation. Therefore, further CL/CDmaxoptimization on TM wing is needed to obtain the optimal condition for the morphing wing configuration. In this paper, two-way fluid–structure interaction(FSI) simulation and wind tunnel testing method are used to solve and study the basic wing aerodynamic performance over(non-optimal) TM, membrane and rigid wings. Then,a multifidelity data metamodel based design optimization(MBDO) process is adopted based on the Ansys-DesignXplorer frameworks. In the adaptive MBDO process, Kriging metamodel is used to construct the final multifidelity CL/CDresponses by utilizing 23 multi-fidelity sample points from the FSI simulation and experimental data. The optimization results show that the optimal TM wing configuration is able to produce better CL/CDmaxmagnitude by at least 2% than the non-optimal TM wings. The flow structure formation reveals that low TV strength on the optimal TM wing induces low CDgeneration which in turn improves its overall CL/CDmaxperformance. | N.I.Ismail A.H.Zulkifli M.Z.Abdullah M.Hisyam Basri Norazharuddin Shah Abdullah | 2014 | Chinese Journal of Aeronautics2014，27，3： | 3 |
| 2 | Computational aerodynamic analysis on perimeter reinforced(PR)-compliant wing显示文摘Implementing the morphing technique on a micro air vehicle(MAV) wing is a very challenging task,due to the MAV's wing size limitation and the complex morphing mechanism.As a result,understanding aerodynamic characteristics and flow confgurations,subject to wing structure deformation of a morphing wing MAV has remained obstructed.Thus,this paper presents the investigation of structural deformation,aerodynamics performance and flow formation on a proposed twist morphing MAV wing design named perimeter reinforced(PR)-compliant wing.The numerical simulation of two-way fluid structure interaction(FSI) investigation consist of a quasistatic aeroelastic structural analysis coupled with 3D incompressible Reynolds-averaged Navier-Stokes and shear-stress-transport(RANS-SST) solver utilized throughout this study.Verifcation of numerical method on a rigid rectangular wing achieves a good correlation with available experimental results.A comparative aeroelastic study between PR-compliant to PR and rigid wing performance is organized to elucidate the morphing wing performances.Structural deformation results show that PR-compliant wing is able to alter the wing's geometric twist characteristic,which has directly influenced both the overall aerodynamic performance and flow structure behavior.Despite the superior lift performance result,PR-compliant wing also suffers from massive drag penalty,which has consequently affected the wing effciency in general.Based on vortices investigation,the results reveal the connection between these aerodynamic performances with vortices formation on PR-compliant wing. | N.I.Ismail A.H.Zulkifli M.Z.Abdullah M.Hisyam Basri Norazharuddin Shah Abdullah | 2013 | Chinese Journal of Aeronautics2013，26，5： | 2 |
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