Proceedings ArticleDOI
The use of linearized-aerodynamics and vortex-flow methods in aircraft design /invited paper/
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In this paper, the NASA Vortex Lattice and Modified Multhopp methods are applied to aircraft design problems at high subsonic speeds, and the suction analogy is used to provide estimates associated with vortex-flow aerodynamics.Abstract:
This paper deals with selected linearized-aerodynamic and vortex-flow methods as applied to aircraft design problems at high subsonic speeds. In particular, the NASA Vortex Lattice and Modified Multhopp methods are the linearized techniques employed, and the suction analogy is used to provide estimates associated with vortex-flow aerodynamics. Many examples are given as to how researchers at Langley have used these methods to design the high subsonic, wing-mean-camber shapes for various configurations such as a supersonic transport, high-aspect-ratio transport, trapezoidal fighter wing, strake wing, tandem wing, joined wing, delta wing, and slender cranked wing. Many of these have been built, tested, and have had their data compared with theory. In addition, a technique for defining efficiently performing strake planforms for use in strake-wing combinations is discussed, and further improvements in wing design are outlined. The latter may be obtained by using higher-ordered linear panel methods as well as nonlinear-transonic methods.read more
Citations
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Book ChapterDOI
Generic Characterisation of Aircraft—Parameter Reduction Process
TL;DR: The conceptual design parameters and design processes which are used to access the development of the generic stability and control method are identified and discussed in Sect.
Proceedings ArticleDOI
Modeling of the aerodynamic response to arbitrary aircraft maneuvres - A numerical validation
Joseph Katz,Lewis B. Schiff +1 more
TL;DR: In this paper, an aerodynamic model applicable to describe the nonlinear aerodynamic reactions to a delta wing maneuvering at high angles of attack is investigated, and time-histories of the aerodynamic responses to complex motions are generated by means of the model and the evaluated aerodynamic data.
Journal ArticleDOI
Review of vortex lattice method for supersonic aircraft design
Hitesh Joshi,Paul S. Thomas +1 more
TL;DR: A review of the use of the vortex lattice method (VLM) in modeling the general aerodynamics of subsonic and supersonic aircraft can be found in this article .
References
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Methods for calculating the lift distribution of wings subsonic lifting-surface theory
TL;DR: In this article, the authors present a simple and economic method for calculating the load distribution on wings of any plan form based on the conceptions of lifting surface theory, which is achieved by a very careful choice of the positions of pivotal points, by plotting once for all those parts of the downwash integral which occur frequently and by a consequent application of approximate integration methods similar to those devised by the author for lifting line problems.
Vortex-lattice FORTRAN program for estimating subsonic aerodynamic characteristics of complex planforms
J. E. Lamar,R. J. Margason +1 more
TL;DR: Computer program for estimating subsonic aerodynamic characteristics of various aerodynamic configurations is presented and examples and typical running times of various types of configurations are provided.
Vortex lattice method for calculation of quasi steady state loadings on thin elastic wings in subsonic flow
TL;DR: In this article, the authors considered wing systems that contain several wing surfaces, and the surfaces were arbitrarily divided in the chordwise and spanwise directions into panels ('boxes'), and the panel load was simulated by a horseshoe vortex, where the boundary condition was fulfilled on every panel at one point.
The Calculation of Aerodynamic Loading on Surfaces of Any Shape
TL;DR: In this article, the authors present a method for calculating aerodynamic loads on wings of arbitrary shape based on potential theory and use a general mathematical formula for continuous loading on a wing which is equivalent to a double Fourier series with unknown coefficients.
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