The optimization is defined to minimize the aircraft fuel consumption for cruise, while satisfying the field performance requirements. Subscribe to get the latest videos, articles, and quizzes that make you a smarter, safer pilot. The planform discretization tool ensures the planform is smooth and continuous. A surrogatebased integrated framework for the aerodynamic. There are other considerations like stealth, controllability etc. The core components are xoptfoil for airfoil design, xflr5 or flow5 for wing design and some additional software to bridge the components and maybe as the icing on the cake a wing outline layouter to support e.
Thus, the low boom optimization simply resulted in a thick fuselage with poor aerodynamic performance. The wing planform is the focus of the study and is performed on an elastic aircraft con. Based on available data, a new optimized planform for the ornithopter wing was designed. Based on the uav mission, a biobjective design optimization problem can be formulated. While there have been multiple blade planform optimization studies conducted previously, they have examined the aerodynamic design in an effort to.
The biplane is inherently lighter and stronger than a monoplane and was the most common configuration until the 1930s. Concurrent wing and highlift system aerostructural optimization. The program calculates a score based on the aircraft performance. We also perform a series of gust load analysis on both the initial and optimized designs and. A coupled adjoint aerostructural tool, that couples a quasithreedimensional aerodynamic analysis method with a finite beam element structural. Three representative processes for wing shape optimization are presented here and demonstrate the viability of computation to improve upon analytical design.
Aerostructural optimization of the common research model. Optimization of planform and cruise conditions of a transport. Design and optimization of a medium altitude long endurance uav wingbox structure y. The optimization increases the aspect ratio of the wing from 9. A fixedwing aircraft may have more than one wing plane, stacked one above another. Aspect ratio is the ratio of wing span to wing chord. Aeroelastic wing planform design optimization of a flutter. Sep 18, 2016 catia software is used for creating the wing geometry.
Wing designer was written as an educational tool to teach the concepts of engineering design tradeoff and parametric analysis. Parametric design, aerodynamic analysis and parametric. The wing planform which is the shape and layout of wing for each aircraft is mainly based on the aerodynamic requirements. Aeroelastic wing planform design optimization of a. A study of morphing wing effectiveness in fighter aircraft. Dec 10, 2011 in both of those examples, the planform makes no difference, but the airfoil sure does. Future works will include extension to threedimensional wing structures, and inclusion of the aerodynamic planform into the optimization process. Design optimization an overview sciencedirect topics. Planform optimization can be considered as large scale design, compared to a section shape design.
In its simplest terms, it is a decrease from wing root to wingtip in wing chord or wing thickness. Mach can perform the simultaneous optimization of aerodynamic shape and structural sizing variables considering aeroelastic deflections. Jameson 2004 215 aerostructural wing planform optimization. Sweepback is the rearward slant of a wing, horizontal tail, or other airfoil surface. They have a variety of fuselage configurations, but a similar planform for wing shapes. After the previously published conceptual design of a 300seat class flying wing, the present article carries out a parametric analysis to optimize its planform and analyse the suitable cruise conditions to achieve the highest efficiency of such configuration. The modelbased software architecture was exploited to optimise the wing planform of the common research model crm flying at mach number, altitude of 0 m, takeoff weight of, and maximum thrust of. Because a similar wing planform leads to a similar lift distribution, the fore body has to become thick to match dardens distribution for low boom. Hybrid wing body planform design with vehicle sketch pad. Solar and gas powered longendurance unmanned aircraft. Surrogate modelling for wing planform multidisciplinary.
A kink is placed on the leading edge because the lift increases due to the leadingedge separation. To formulate the optimization problem properly, it is important to understand how planform parameters aect drag and wing wight. Simulations are also performed for wing with highlift devices, hlds, like leading edge slat and trailing edge flap for takeoff and landing condition. Aerodynamic optimization of a uav wing subject to weight. Newmark, which predict the performance of the flapping wing craft given various parameters. C034405 fueled by telecommunication needs and opportunities, there has been a recent push to develop aircraft that can. A long, narrow wing is harder to build strong than a short, wide one. Pdf aeroelastic wing planform design optimization of a. The aircraft should be capable of operating in the same. A study of morphing wing effectiveness in fighter aircraft using exergy analysis and global optimization techniques by jeffrey robert butt abstract this thesis work presents detailed results of the application of energy and exergybased methods to the integrated synthesisdesign of an airtoair fighter aaf. While there have been multiple blade planform optimization studies conducted previously, they have examined the aerodynamic design in an effort to improve performance, reduce noise, reduce vibration, or. The wing plot tool allows you to sketch a wing planform by defining a valid combination of the critical wing geometric properties. This article presents basic results from wing planform optimization for minimum drag with constraints on structural weight and maximum lift. The aeroelastic uav characteristic and imposed constraints, defined by operational aspects and the structural integrity are described by surrogate modeling.
Flying wing designer, rc and uav designing software. As clearly seen in the results, the functional constraints related with at the maximum and are the key reason for the similar outcomes from the different optimization problems. To accomplish this, the software was restricted to find a solution that could only distort the wing planform outwards, away from the control surfaces. A surrogatebased integrated framework for the aerodynamic design optimization of a subsonic wing planform shape abdelkader benaouali and stanislaw kachel proceedings of the institution of mechanical engineers, part g. In all cases, optimization provided only a modest improvement in the flight power requirement. Adalia received 11 october 20, in revised form 14 may 2014 and accepted 04 june 2014. Description of ornithopter wing the current harrisdelaurier model fullscale ornithopter has a very unique wing design. Wing planform optimization method for lowboom and low. Design and optimization of a medium altitude long endurance. This allows for engineers to produce more efficient and cheaper aircraft designs. Jameson 2004 stanford university, stanford, ca 529 aerostructural wing planform optimization. Solar and gas powered longendurance unmanned aircraft sizing. Wing area, wing span, aspect ratio, taper ratio, root chord, tip chord, and sweep angle quarter chord.
A high fidelity morphing wing with several actuation points will require a. The basic terminology in the wing geometry is given in the figure below. A fixed wing aircraft may have more than one wing plane, stacked one above another. As anticipated, the wing thickness should be minimized. What software is used for aerodynamic wing shape optimization. Subsonic wing planform design using multidisciplinary optimization sean wakayama and ilan krooi stanford university, stanford, california 94305 this article presents basic results from wing planform optimization for minimum drag with constraints on structural weight and maximum lift.
Taper ratio can be either in planform or thickness, or both. Optimization of an active twist rotor blade planform for. Wing planform modi cations can also reduce vortex drag. Wingshape optimization is a software implementation of shape optimization primarily used for aircraft design. Wing aerostructural optimization using the individual. Now, there is another factor that comes into play here. It aects both aerodynamic and structural characteristics of the wing. Wing planform the shape of the wing as viewed from directly above deals with airflow in three dimensions, and is very important to understanding wing performance and airplane flight the previous discussions on wings have dealt only with airfoil section properties and two dimensional airflow. Sep 15, 2017 a method is presented for concurrent aerostructural optimization of wing planform, airfoil and high lift devices.
In both of those examples, the planform makes no difference, but the airfoil sure does. Design optimization of a variablespan morphing wing. Solar and gas powered longendurance unmanned aircraft sizing via geometric programming michael burton. Most methods begin with a humandesigned wing, and use iterations either genetic or cfdgradientbased to reach an optimum. Variablespan wing aerodynamic optimization the main goal of this work is to design a wing that can perform inflight span variations, a variablespan wing vsw, in order to reduce wing drag at a given flight speed. The flying wing is a promising concept for the mid longterm commercial aviation. Wing and fuselage structural optimization considering. A surrogatebased integrated framework for the aerodynamic design optimization of a subsonic wing planform shape. An interactive software for conceptual wing flutter analysis and parametric study vivek muldaopadhyay systems analysis branch, aeronautical systems analysis division ms 248, nasa langley research center abstract an interactive computer program was developed for wing flutter analysis in the conceptual design stage. Analyses in each of these disciplines are developed and integrated to yield successful optimization of wing planform shape. This is work in progress and later in development it will also give you 3d view of the model. In my next blog, i will explore a full 3d wing and reveal more of the power of multiparameter optimization in flow 2017.
The structural discipline in this case is assumed to include a simple lowfidelity aerodynamic load estimation tool such as a vortex lattice method, therefore the aerodynamic loads are not passed to the structural discipline from. May 22, 2012 multidisciplinary design optimization of aircraft wing planform based on evolutionary algorithms recommended transport category wing weight estimation using a optimizing beamelement structural formulation. The aim of the project is to support a full circle aerodynamic optimization of a wing design. Flying wing designer page is dedicated to bringing updates about software development for designing flying wing rc models and unmanned. Optimization of planform and cruise conditions of a. The user selects airfoil cross sections from a menu, enters wing span, dihedral angle, sweep, angle of attack, and engine parameters. Catia software is used for creating the wing geometry. Flying wing designer, rc and uav designing software science. The f106 delta dart is a great example of this, flying at speeds of up to mach 2. Ncga neighbor cultivation genetic algorithm embedded inside isightfd was used for multiobjective optimization by setting several objective functions in the design process. This dissertation focuses on the problem of wing planform optimization for transonic aircraft based on flow simulation using computational fluid dynamics cfd combined with an adjointgradient based numerical optimization procedure.
Wing planform optimization method for lowboom and lowdrag. Use the sliders below to select or deselect geometric variables. Wing and fuselage structural optimization considering alternative material systems by jonathan lusk b. Sep 18, 2015 demonstration of jetstream optimizing the planform of a wing. An interactive software for conceptual wing flutter analysis. American institute of aeronautics and astronautics 12700 sunrise valley drive, suite 200 reston, va 201915807 703. This is the first tab where you actually start with the very design of the wing. However, some insight was gained into particular trends concerning lowreynoldsnumber, lowaspectratio wing design. Results demonstrate the importance of weight constraints, compressibility drag, maximum lift, and static aeroelasticity on wing. Multidisciplinary design optimization of aircraft wing planform based on evolutionary algorithms recommended transport category wing weight estimation using a optimizing beamelement structural formulation.
Optimization of morphing wing structures when a given structure is created to emulate the complexities of what exists in nature, a method must also be developed to command the structure to take a desired shape. Most of the wing platforms in use or have been used fall. Demonstration of jetstream optimizing the planform of a wing. When designing the wing, you need to look at how you want it to fly, how strong it needs to be, and what you are going to build it.
Of course there were more variables at play for the wright flyer than just airfoil, including the 3d wing shape planform area and aspect ratio and dihedral angle. In this work, a study to design a highly flexible flutter demonstrator for the development and testing of active flutter suppression is presented. During the last decade aerodynamic shape optimization methods based on control theory have been used to design shock free wings and the methods are perfected for rigid wings with xed planforms. First step is to design planform by entering wing parameters in table. We gratefully acknowledge the support of the european office of aerospace research and development, air force office of scientific research, and nasa langley for this research.
Aerospace represents a rich area for optimization work. Subsonic wing planform design using multidisciplinary. The plain wing geometry is arrived by sequentially analyzing each geometric parameter. A method is presented for concurrent aerostructural optimization of wing planform, airfoil and high lift devices. The aspect ratio of the wing was set to 16,2 in order for it to be able to support gliding.
172 1251 849 709 102 1383 779 1096 1315 624 176 1351 881 1013 1421 99 892 501 1449 601 424 749 595 201 1379 937 312 599 759 1228 1260 9 5 92