Undeflected Common Research Model (uCRM): An Aerostructural Model for the Study of High Aspect Ratio Transport Aircraft Wings

The influence of structural elastic deformation on the aerodynamic characterisitcs of large transport aircraft has been researched. A method of static aeroelasticity based on multi-block structural grid of high aspect ratio wing has been established, and then a design method of jig-shape is developed. The technology of RBF interpolation is used to exchange the data of CFD/CSD. Based on RBF&Delaunay technology, a mesh motion method is developed to make the design process less time-consuming, which can be applied to large deformation of multi-block structural grid. The static aeroelastic deformation of a wing-body of large transport aircraft is analyzed. Then the wing-body's jig-shape is designed. Compared the aerodynamic characteristics between design cruise shape and target cruise shape, it shows that the aerodynamic characteristics of design cruise shape is almost equal to target cruise shape and the design process of jig-shape is feasible.

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Modeling and Simulation of Flexible Jet Transport Aircraft with High-Aspect-Ratio Wings

15th Dynamics Specialists Conference ◽

10.2514/6.2016-2046 ◽

2016 ◽

Cited By ~ 10

Author(s):

Ryan C. Kitson ◽

Christopher Lupp ◽

Carlos E. Cesnik

Keyword(s):

Aspect Ratio ◽

Modeling And Simulation ◽

High Aspect Ratio ◽

Transport Aircraft

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Conceptual design and analysis of an affordable truss-braced wing regional jet aircraft

Proceedings of the Institution of Mechanical Engineers Part G Journal of Aerospace Engineering ◽

10.1177/0954410020923060 ◽

2020 ◽

pp. 095441002092306

Author(s):

Saeed Hosseini ◽

Mohammad Ali Vaziri-Zanjani ◽

Hamid Reza Ovesy

Keyword(s):

Aspect Ratio ◽

Cost Analysis ◽

High Aspect Ratio ◽

Passenger Transport ◽

Transport Aircraft ◽

Aspect Ratios ◽

The Cost ◽

Bypass Ratio ◽

Very High ◽

Selection Of

A regional, turbofan-powered, 72-passenger, transport aircraft with very high aspect ratio truss-braced wings is developed with an affordable methodology from an existing 52 passenger, conventional twin-turboprop aircraft. At first, the ration behind the selection of the truss-braced wing configuration is discussed. Next, the methodologies for the sizing, weight, aerodynamics, performance, and cost analysis are presented and validated against existing regional aircraft. The variant configurations and their design features are then discussed. Finally, sensitivity analysis is carried out to investigate the effects of the wing aspect ratio and engine bypass ratio on the aircraft weight, aerodynamics, and cost. It has been found that the penalties associated with the wing weight will prevent the acceptable realization of the high aspect ratio wing benefits, but when it is combined with the very high bypass ratio engines, a 17% reduction in the mission fuel weight is achieved. In contrast, the cost analysis has revealed that the application of higher aspect ratio wings in the truss-braced wing configuration may increase the development and maintenance costs. Consequently, with aspect ratios higher than 24, eventually, these costs may outperform the associated fuel cost reductions.

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AERO DYNAMIC SHAPE OF TRANSPORT AIRCRAFT “FLYING WING” SCHEME WITH HIGH ASPECT RATIO

MECHANICS OF GYROSCOPIC SYSTEMS ◽

10.20535/0203-377127201438043 ◽

2014 ◽

pp. 84-92

Author(s):

Олег Львович Лемко ◽

Євген О. Кушніренко

Keyword(s):

Aspect Ratio ◽

High Aspect Ratio ◽

Aerodynamic Characteristics ◽

Design Parameters ◽

Scientific Methods ◽

Transport Aircraft ◽

Research Problems ◽

And Performance ◽

Forming Methods ◽

Dynamic Shape

"Normal" aerodynamic scheme despite the fact that it has become the dominant in global aviation, in terms of aerodynamics is not ideal. To create a lifting force only wing is just necessary. All other elements of aircraft glider - fuselage , horizontal and vertical tail exist only for the crew, passengers and cargo, ensuring the sustainability and management to provide a satisfactory landing characteristics. It became apparent that with the increasing size of the planes becomes possible and appropriate to place all the major part of their weight directly in the wing. This idea was expressed in aerodynamic scheme "flying wing".The purpose of the research is to form aerodynamic look of transport aircraft "flying wing" scheme with high aspect ratio, creating aerodynamic design that provides the greatest rate of return and optimal weight range and flight duration.Objectives of the study are: analysis of scientific sources on establishing LA scheme "flying wing", development of forming methods of the aerodynamic look of transport aircraft scheme "flying wing", based on a synthesis of existing methods for assessing the flight - the technical characteristics of the aircraft, studies and analyzes of theoretical methods of aerodynamic layouts transport aircraft "flying wing" scheme to determine the aerodynamic and flight characteristics. Were used following scientific methods to solve the research problems: 1. Method of forming the aerodynamic characteristics of the freeform aircraft shape in the parameters of similarity and generalized design parameters. 2. Statistical methods for assessing the aerodynamic and performance characteristics. 3. Numerical methods.The practical value of my work: developed method allows you to create aerodynamic layout scheme aircraft "flying wing" of the great extension that allows you to fully realize the benefits of the scheme, developed and reasonable advices on the aircraft aerodynamic look of "flying wing" scheme of high aspect ratio.

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