Results 311 to 320 of about 70,445 (357)

Noise generation in transonic tunnels

8th Aerodynamic Testing Conference, 1974
R emphasis has been placed on the noise environment in transonic facilities. This increased attention surrounding the tunnel noise problem was brought about by the advent of high lift configurations operating in the transonic regime. Experimental investigations' have shown that the tunnel noise environment may have a significant influence on high lift ...
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Calculation of Transonic Aileron Buzz

AIAA Journal, 1979
An implicit finite-difference computer code that uses a two-layer algebraic eddy viscosity model and exact geometric specification of the airfoil has been used to simulate transonic aileron buzz. The calculated results, which were performed on both the Illiac IV parallel computer processor and the Control Data 7600 computer, are in essential agreement ...
Steger, J. L., Bailey, H. E.
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On Some Aspects of the Transonic Controversy

SIAM Journal on Applied Mathematics, 1987
The authors investigate the ''transonic controversy'' by developing perturbation series on a computer and show that shockless transonic flow depends on the boundary condition imposed. This result sheds new light on the problem but does not resolve the old controversy.
Kwok, Yue-Kuen, Sirovich, Lawrence
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Higher approximations of the transonic expansion in problems of unsteady transonic flow

Journal of Applied Mathematics and Mechanics, 1997
Abstract Modifications of the equation of unsteady transonic flow are investigated, which avoid the drawbacks which arise when using the transonic approximation (the Lin-Reissner-Tsien equations) and other equations of unsteady transonic flow to describe transonic flows. Several problems concerning flows of this kind (the stability of transonic flows,
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Transonic Flows

2015
Abstract This chapter considers the far field in the two-dimensional flow past an arbitrary body, assuming that M∞ = 1 .The corresponding solution of the Euler equations can be found in a self-similar form. In this solution, the flow, that is subsonic in front of the body, experiences acceleration to become supersonic before it reaches a
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Perturbation of a discontinuous transonic flow

15th Aerospace Sciences Meeting, 1977
The main difficulty in perturbing a discontinuous transonic flow is in the representation of the shift in the location of the discontinuity (shock wave). Herein presented is a method of overcoming this difficulty by using a distorted airfoil as the initial case rather than the real physical airfoil; the distortion is chosen such that the shock location
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Transonic Airfoil and Intake Calculations

1989
Two-dimensional, transonic, inviscid flows of perfect gases are computed about airfoils and air intakes. The numerical technique is an unsteady version of the λ-scheme with two-dimensional shock fitting. Several problems involving NACA 0012 and Korn airfoils and three different intake cases, using the same geometry, are solved and discussed.
LIPPOLIS, Antonio Donato, MORETTI G.
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Supersonic and Transonic Aircraft Problems

Journal of the American Rocket Society, 1947
A great honor has been conferred on me, especially the invitation^which said that I was particularly qualified" to discuss supersonic and transonic aircraft problems. Throughout my ! disertation the emphasis is going to be placed entirely on that word 'problem'. As so ably put by General Craigie quite recently in that "with respect to many of the major
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Transonances

Computer Music Journal, 1987
Andrea Houtkin, Susan Frykberg
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Mathematical Problems in Transonic Flow

Canadian Mathematical Bulletin, 1986
AbstractWe present an outline of the problem of irrotational compressible flow past an airfoil at speeds that lie somewhere between those of the supersonic flight of the Concorde and the subsonic flight of commercial airlines. The problem is simplified and the important role of modifying the equations with physics terms is examined.
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