Aircraft Wake Turbulence and Its Detection: Proceedings of a by W. L. Shields (auth.), John H. Olsen, Arnold Goldburg,

By W. L. Shields (auth.), John H. Olsen, Arnold Goldburg, Milton Rogers (eds.)

The mixture of accelerating airport congestion and the advert­ vent of enormous transports has brought on elevated curiosity in plane wake turbulence. A quantitative knowing of the interplay among an plane and the vortex wake of a previous airplane is critical for making plans destiny excessive density air site visitors styles and keep an eye on structures. the character of the interplay depends upon either the features of the subsequent airplane and the features of the wake. many of the inquiries to be spoke back are: What deter­ mines the entire features of the vortex wake? What houses of the next plane are very important? what's the function of pilot reaction? How are the wake features relating to the genera­ ting airplane parameters? How does the wake fall apart and the place? a lot of those questions have been addressed at this primary airplane Wake Turbulence Symposium backed by way of the Air strength place of work of Sci­ entific examine and The Boeing corporation. staff engaged in aero­ dynamic examine, airport operations, and device improvement got here from numerous count number ries to provide their effects and trade details. the recent effects from the assembly supply a present photograph of the kingdom of the data on vortex wakes and their interactions with different plane. Phenomena formerly considered as mere curiosities have emerged as very important instruments for realizing or controlling vortex wakes. the recent sorts of instability happening in the wake may well in the future be used for selling early dis integration of the detrimental dual vortex structure.

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Additional info for Aircraft Wake Turbulence and Its Detection: Proceedings of a Symposium on Aircraft Wake Turbulence held in Seattle, Washington, September 1–3, 1970. Sponsored jointly by the Flight Sciences Laboratory, Boeing Scientific Research Laboratories and the Air F

Example text

By repeating the analysis carried out for model B of Fig. 4 on p. 241 of Lamb 2 step by step, the instantaneous velocity of the iso1ated ring is . 558} The agreement between the present viscous theory and the c1assica1 26 L. TING inviscid theory on the instantaneous velocity of the ring with the same vorticity distribution, (0) is expected because eq. (33) for $(1) contains viscosity on1y imp1icit1y through ,(0). The c1assica1 inviscid theory is inaccurate for the subsequent motion due to the diffusion of the vortica1 core.

The leading term in the out er solution is given by the classical inviscid theory. The inner solution removes the singularities of the inviscid theory at the vortex line regardless of the vorticity distribution in the viscous core. The velocity of the vertex line, except in the two dimensional case, depends on the vorticity distribution. For the same vorticity distribution at each instant the present theory and the classical inviscid theory yield the same velocity for the vortex line; however, the latter fails to account for subsequent diffusion of vorticity in the small vortical core.

901-910, May 1967. S. , Conduction of Heat in Solid, Oxford Univ. , London, 1959. Ting, L. , Perturbation Solutions and Asymptotic Solutions in Boundary Layer Theory, J. Eng. Math. vol. 1, pp. 327-340, October 1967. Kleinstein, G. U. , Oberhettinger, F. and Soni, R. , 1966. TRANSPORT OF A VORTEX WAKE IN A STABLY STRATIFIED ATMOSPHERE I. H. Tombach Meteorology Research, Inc. ABSTRACT Atmospheric stratification affects the downward motion of an aircraft vortex wake and may influence the persistence and stability of the vortex pair configuration.

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