A Hybrid Field Panel/finite Difference Method for 3-D Potential Unsteady Transonic Flow Calculations
Author : M. H. L. Hounjet
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Page : 13 pages
File Size : 20,42 MB
Release : 1983
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Author : M. H. L. Hounjet
Publisher :
Page : 13 pages
File Size : 20,42 MB
Release : 1983
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Page : 30 pages
File Size : 11,50 MB
Release : 1992
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Page : 42 pages
File Size : 46,56 MB
Release : 1982
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A brief review is presented of various problems which are confronted in the development of an unsteady finite difference potential code. This review is conducted mainly in the context of what is done for a typical small disturbance and full potential method. The issues discussed include choice of equations, linearization and conservation, differencing schemes, and algorithm development. A number of applications, including unsteady three-dimensional rotor calculations, are demonstrated. (Author).
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Page : 26 pages
File Size : 34,95 MB
Release : 1979
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Page : 704 pages
File Size : 33,13 MB
Release : 1995
Category : Aeronautics
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Page : 32 pages
File Size : 16,67 MB
Release : 1984
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Applications of computational aerodynamics to aeronautical research, design, and analysis have increased rapidly over the past decade, and these applications offer significant benefits to aeroelasticians. This paper traces the past developments by means of a number of specific examples, and projects the trends over the next several years. The crucial factors that limit the present capabilities for unsteady analyses are identified; they include computer speed and memory, algorithm and solution methods, grid generation, turbulence modeling, vortex modeling, data processing, and coupling of the aerodynamic and structural dynamic analyses. The prospects for overcoming these limitations are presented, and many improvements appear to be readily attainable. If so, a complete and reliable numerical simulation of the unsteady, transonic viscous flow around a realistic fighter aircraft configuration could become possible within the next decade. The possibilities of using artificial intelligence concepts to hasten the achievement of this goal are also discussed. Key words include: Flutter predictions; Oscillating wings; and Unsteady computational aerodynamics.
Author : United States. Superintendent of Documents
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Page : pages
File Size : 30,36 MB
Release : 1985
Category : Government publications
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February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index
Author : Wayne Johnson
Publisher : Cambridge University Press
Page : 949 pages
File Size : 43,69 MB
Release : 2013-04-29
Category : Mathematics
ISBN : 1107028078
A rotorcraft is a class of aircraft that uses large-diameter rotating wings to accomplish efficient vertical take-off and landing. The class encompasses helicopters of numerous configurations (single main rotor and tail rotor, tandem rotors, coaxial rotors), tilting proprotor aircraft, compound helicopters, and many other innovative configuration concepts. Aeromechanics covers much of what the rotorcraft engineer needs: performance, loads, vibration, stability, flight dynamics, and noise. These topics include many of the key performance attributes and the often-encountered problems in rotorcraft designs. This comprehensive book presents, in depth, what engineers need to know about modelling rotorcraft aeromechanics. The focus is on analysis, and calculated results are presented to illustrate analysis characteristics and rotor behaviour. The first third of the book is an introduction to rotorcraft aerodynamics, blade motion, and performance. The remainder of the book covers advanced topics in rotary wing aerodynamics and dynamics.
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Page : 538 pages
File Size : 29,76 MB
Release : 1991
Category : Aeronautics
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Page : 400 pages
File Size : 42,6 MB
Release : 1948
Category : Mechanics, Applied
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