Titlebook: Aircraft Wake Turbulence and Its Detection; Proceedings of a Sym John H. Olsen,Arnold Goldburg,Milton Rogers Conference proceedings 1971 Pl

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,Der Konstrukteur und das Werkstück,ar identification of the various significant factors and mechanisms involved in the transport/decay process. Outside of the ground effect, the dominant factors include the cir­culation and core characteristics of the vortices, the turbulence in the wake and in the environment, and the thermal stabil

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Der Konstrukteur und die Zeichnung,l solution for the flow field within and near a curved vortex filament with an arbitrary distribution of swirl and axial velocities. The velocity field induced in the neighborhood of the vortex core by distant portions of the vortex line is calculated for a sinusoidally perturbed vortex filament and

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Precursor

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Studies in the Motion and Decay of Vorticesrtex. A general scheme is presented for the matching of the inner viscous core of the vortex to the outer inviscid solution. The singularities in the inviscid theory are removed and the condition of regularity in the flow field defines the velocity of the vortex line. This general scheme is applied

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Split-Film Anemometer Sensors for Three-Dimensional Velocity-Vector Measurementth a probe consisting of three, orthogonal, hot-film sensors. However, this measurement requires an a priori knowledge of the octant of the velocity vector. The new probe has a similar configuration but uses three split-film sensors to provide automatic octant indication. Each hot-film sensor consis

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Sub-Scale Modeling of Aircraft Trailing Vorticese vortices shed by one airplane with another airplane, (3) measurements of the vortices shed by a low-flying airplane with ground-based instruments. The wind-tunnel method is suitable for the study of vortex formation, but not the long-time decay process. The second method would have been the most r

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The Utility of Doppler Radar in the Study of Aircraft Wing-Tip Vorticesntal methods are undertaken to investigate the potential value of the Doppler radar approach. The first method involves injection of radar reflecting chaff into the wing-tip vortex of an aircraft in flight, and subsequently recording the Doppler spectrum of the return from the chaff packet as obtain

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Application of Laser Doppler Systems to Vortex Measurement and Detectionshift undergone by a beam of radiation when scattered by particles suspended in the flows. From the measurement of this difference frequency between the scattered and the reference laser light and knowledge of the geometry of the system, the velocity is directly determined. A three-dimensional syste