In 1994 an array of two-axis propeller anemometers was installed at 10-meter height under the approach to Runway 31R at Kennedy Airport. Since the aircraft are typically 50 meters above the ground at the test location, the wake vortices rapidly descend toward the ground where they are readily detected and measured by the anemometers. In 1995 a similar installation was made on Runway 27 at the Memphis Airport. The ultimate goal of this study is to better understand when wake vortices remain in the flight path of following aircraft. The data collection system operates automatically and hence provides wake vortex data under all weather conditions and at all times of day and night with minimal cost. Real-time remote display of the vortex locations was implemented. The anemometers are augmented with additional weather sensors to provide meteorological data with greater detail than the standard surface weather observations. New processing methods for the anemometer data were developed to determine vortex height and strength in addition to the lateral position that was traditionally obtained from ground-based anemometers. The anemometer array is particularly appropriate for studying the interaction of wake vortices with the ground. It readily detects the secondary vortices detached from the boundary layer by the influence of the primary wake vortices; these secondary vortices produce the well known vortex bouncing. Such secondary vortices have not been seen by any other sensing system.


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    Title :

    Ground-based anemometer measurements of wake vortices from landing aircraft at airports


    Additional title:

    Bodenanemometermessungen der Nachlaufwirbel hinter landenden Flugzeugen auf Flughäfen


    Contributors:


    Publication date :

    1996


    Size :

    7 Seiten, 11 Bilder, 3 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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    Abramson, S. / Burnham, D. C. / Advisory Group for Aerospace Research and Development; Fluid Dynamics Panel | British Library Conference Proceedings | 1996


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