Amoignon 1royal institute of technology kth, 10044 stockholm, sweden 2nangia aero research associates, bristol bs8 1qu, uk 3swedish defence research agency foi, 16490 stockholm, sweden this paper provides a technique that minimize the cruise. Adaptive shape parameterization for aerodynamic design nas nasa. Multiobjective numerical optimization applied to aircraft. Human powered aircraft design is a caricature of the classic structural efficiency thick, short wing versus aerodynamic efficiency thin, long wing tradeoff. Aerodynamic shape optimisation has become an indispensable component for any effective and robust aerodynamic design. Aerodynamic guidelines in the design and optimization of new regional turboprop aircraft ceas 2011 the international conference of the european aerospace societies. International centre for mechanical sciences courses and lectures, vol 366. The aerodynamic optimization design system is applied to dlrf6 wingbodypylonnacelle.
Integrated optimization on aerodynamicsstructure coupling. Use of the cfd for the aerodynamic optimization of the car. Retrieved from vol1iss46 this article is brought to you for free and open access by the journals at scholarly commons. This will be followed by a discussion of the advantages and disadvantages of the. Optimal aircraft design is impossible without a parametric representation of the geometry of the airframe. We also emphasize the geometry development associated with aerodynamic design, primarily using the exercises at the end of the chapter. The computational cost of this method is proportional to the number of design variables and. Parametric optimization is carried out using genetic algorithm to seek the minimal weight of a simplified platebeam wing structure in the cruise trim condition subject to aeroelastic, aerodynamic, and stability constraints, and the optimal wing geometry shape, frontrear spar positions, and structural sizes are obtained simultaneously. Within the context of aircraft design, the aerodynamic design process is applied to.
The type, shape, size and location of the corresponding possibly. Recent advances in convex optimization offer significant advantages over the general nonlinear optimization methods typically used in aircraft design. The book is generally well written and easy to read, with a pleasing use of aircraft photographs to illustrate the text. In early days the design was randomly set and it was tested in a flow section, then wright brothers came up with cambered section. Regarding the geometry modeler, automated shape deformation tools. Within the context of aircraft design, the aerodynamic design process is applied to the shape of various components of the aircraft. Aircraft aerodynamic design by andras sobester overdrive. As always the flight performances key is aerodynamic shaping together with an early assurance of proper stability margins and efficient control power. Multiobjective numerical optimization applied to aircraft design. A fighter aircraft carries various types of stores such as drop tanks, missiles, and bombs. This work was done wholly or mainly while in candidature for a research degree at this university. Computational aerodynamic analysis on store separation. The use of numerical optimization for transonic aerodynamic shape design was pioneered by hicks.
Dulikravich the pennsylvania state university, university park, pa, usa 12. Aerodynamic design of aircraft research papers academia. Aircraft aerodynamic design geometry and optimization knovel. Combined optimization and inverse design of 3d aerodynamic. Aerodynamic guidelines in the design and optimization of.
Another objective is to illustrate the engineering aspects of the process. Airplane design with aerodynamic shape optimization aerospace. Adaptive shape parameterization for aerodynamic design. Engineering the aerodynamic design and optimization of light aircraft components has been carried out. Bwb optimization with increased geometric flexibility ix.
A brief description of the aerodynamic design tools that have been used for wing design at embraer, with focus on its application and usage, is given below. View aerodynamic design of aircraft research papers on academia. Aerodynamic design optimization of nacellepylon position. Empiricaltheoretical tools some of the most important theoretical tools that are in use or have been used during the design of embraer transport aircraft wings are described below. An intermediate level design will require the consideration of multiple load cases, perhaps of o50 aerodynamic loads, each requiring a. Here, a bezier net describing the changes in the geometry is placed around the baseline mesh. Geometry and optimization aerospace series, by andr. Preliminary aerodynamic shape optimization of a blendedwing. Wingfuselage junction, undercarriage cockpit and wingtip device are investigated. We need a mathematical model equipped with a set of.
Geometry and optimization is a practical guide for researchers and practitioners in the aerospace industry, and a reference for graduate and undergraduate students in aircraft design and multidisciplinary design optimization. In terms of the use of computational aerodynamics, a key goal is to define a process for using software in aerodynamic design. Furthermore the structural optimization is not performed at the design conditions but is evaluated at o. Aerodynamic optimization of aircraft configurations with. Mach can perform the simultaneous optimization of aerodynamic shape and structural sizing variables considering aeroelastic deflections. Jan 11, 2014 for the love of physics walter lewin may 16, 2011 duration. Central to the proposed methodology is the nonuniform rational bspline, used here to develop a new geometry generator and geometry control system applicable to the aerodynamic design of both conventional and unconventional aircraft. A parallel aerostructural optimization framework for. Nevertheless, it is attractive when compared with other traditional design strategies such as inverse methods, since it permits any choice of the aerodynamic figure of merit. The aeronautical journal, 1 april 2015aircraft aerodynamic design. This will be followed by a discussion of the advantages and disadvantages of the biplane configuration. Geometry control system for exploratory shape optimization.
A case study in aerodynamic shape optimization 223 12. The separated pso method is taken as the optimization framework, and the kriging model is introduced to the optimization process. To build an optimal design system which is used for the wingpylonnacelle optimization, there are three key techniques to be resolved. Wiley, aircraft aerodynamics design geometry and optimization. Aerodynamic design considerations and shape optimization of. International journal of aviation, aeronautics, and aerospace, 14. Aerodynamic optimization of a biplane configuration using. The research group has been also deeply involved in flight tests of general aviation aircraft for flight. Aerodynamic shape optimization of tailless aircraft. Modern geometric program solvers are extremely fast even on large problems, require no initial guesses or tuning of solver parameters, and guarantee. When performing aerodynamic shape design optimization, it is necessary to use an efficient method to define the geometry with a minimum number of parameters design variables to reduce computational cost. Preliminary aerodynamic shape optimization of a blended. Significant results have been obtained in the design of new highlift airfoils for stol ultralight category 7.
In support of this, we also matured the discrete geometry engine that underlies the work. This inboard geometry may also impact unusually strong shock wave buildup on the outer wing. Where any part of this thesis has previously been submitted for a degree. Naca has given a proper definition for airfoil which helps us to generate airfoil using formulas and not randomly. Aircraft design optimization as a geometric program. Various configurations for airplane wing tip winglets have been investigated by performing 3d aerodynamic analysis. Airplane design with aerodynamic shape optimization. Aerodynamic guidelines in the design and optimization of new. Challenging topological prejudice 237 references 239. Aerodynamic design deals with the development of outer shapes of an aircraft, optimizing for its performance, handling qualities and loads. Sobester, andras and forrester, alexander 2014 aircraft aerodynamic design. A an efficient and robust geometry modification method is required especially for juncture regions, and the fastrobust grid distortion technology becomes important concerns.
For the love of physics walter lewin may 16, 2011 duration. Aerodynamic design considerations and shape optimization of flying wings in transonic flight m. Numerical shape optimization of airfoils with practical. Development of methodologies for the aerodynamic design. Aerodynamic shape optimization of tailless aircraft maurizio milani november 30, 2016 faculty of aerospace engineering politecnico di milano. The aim of the geometry module is to bridge the gap between conceptual and preliminary design and to allow for geometry parameter and optimization studies in the preliminary design phase.
The geometry generator adopts a componentbased approach, where. Design of the winglet is presented highlighting performance improvements during the entire mission profile. Retrieved from vol1iss46 this article is brought to you for free and open access by. Geometry and optimization addresses this problem by navigating the subtle tradeoffs between the competing objectives of geometry parameterization. Development of methodologies for the aerodynamic design and. Aerodynamic shape optimization starting from random. In particular, results for xed section, planform optimizations are presented, followed by preliminary results for section optimization. Early investigations into aerodynamic optimization relied on direct evaluation of the in. An existing blended winglet has been equipped with a secondary lower element to create a split winglet configuration. Stateoftheart in aerodynamic shape optimisation methods. Topology optimization in aircraft and aerospace structures design. In this thesis, conceptualstage aircraft design problems are formulated as geometric programs gps, which are a speci. Ar 2 where aris the aspect ratio, and is an e ciency factor close to unity. An industrial view on numerical simulation for aircraft.
Design procedures and algorithm the power of aerodynamic shape optimization aso based on computational fluid dynamics cfd is to automatically improve the design of aircraft components. Methodologies for the aerodynamic design and optimization of new regional turboprop aircraft and the work presented in it are my own. Optimum aerodynamic design using the navierstokes equations. Topology optimization in aircraft and aerospace structures. Aerodynamic shape optimization starting from random initial. Aerodynamic design of aircraft linkedin slideshare. When someone must visit the book shops, search shop by store, rack by shelf, it is very bothersome.
The geometry of the 2d and 3d wing is selected and using this geometry the model has been created. The evolution of the aerodynamic design tools and the. In connection with the optimization design requirements of the modern transport, the wingbodypylonnacelle optimization design system has been developed in this study based on the arbitrary space free form deformation ffd. Aerodynamic shape optimization of complex aircraft. Aerodynamic design considerations and shape optimization. Geometry and optimization aerospace series andras sobester, alexander i j forrester on. Between now and 2030, there will be an estimated global demand for approximately 27,000 new passenger aircraft potentially worth up to.
This dependence was estimated by separately varying each design parameter and recalculating the. These tools are components of the framework for multidisciplinary design optimization mdo of aircraft configurations with high fidelity mach. The primary objective was to develop a fullyfunctional prototype system that automatically and adaptively parameterizes discrete geometries for aerodynamic shape optimization. Universita degli studi di napoli federico ii facolta ingegneria dipartimento ingegneria aerospaziale doctoral thesis in aerospace engineering. View notes wiley, aircraft aerodynamics design geometry and optimization from aero 102 at cairo university.
341 44 1461 1156 267 786 484 1059 1258 1167 125 1397 881 1507 350 865 251 1104 1566 1544 1117 1178 1445 1459 991 300 708 1581 562 1031 423 518 750 1319 613 249 803 1403 126 1359 1092 160