Predicting near-ground vortex lifetimes using Weibull density functions

Berk, L.; Hallock, J. N.; John A. Volpe National Transportation Systems Center (U.S.)

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Predicting near-ground vortex lifetimes using Weibull density functions

2007-01-08
By Berk, L. ; Hallock, J. N.

[PDF-375.91 KB]

English

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Creators:

Berk, L. ; Hallock, J. N.

Berk, L. ; Hallock, J. N. Less -
Corporate Creators:

John A. Volpe National Transportation Systems Center (U.S.)
Subject/TRT Terms:

[+]

Aircraft Aviation Safety Ground Effect Modeling Vortices Wake Avoidance Weibull Distributions
Publication/ Report Number:

AIAA 2007-1057
Resource Type:

Proceedings
Corporate Publisher:

American Institute of Aeronautics and Astronautics
Abstract:

To mitigate safety hazards posed by near-ground vortex lateral transport, under

instrument flight rules (IFR), parallel runway operations must adopt aircraft spacing

standards that often reduce capacity. Once the phenomenon of lateral transport is

understood, it is conceivable that, under IFR, new separation standards could restore some

runway capacity. In this context, it is of interest to establish the probability that a wake

vortex is still surviving in lateral transport t seconds after it began migrating. This paper

applies survival data analysis methods to demonstrate how to generate predictions of

survival probability that are specific to aircraft type. Modeling assumptions lead to a family

of Weibull probability densities, a form that is useful for modeling wind phenomena.
Format:

PDF
Collection(s):

Volpe Center
Main Document Checksum:

[+]

urn:sha256:8f3f9d99924ba06b87fc536f22412ca69eeed57486f00872378bc28d757fc149
Download URL:

https://rosap.ntl.bts.gov/view/dot/9089/dot_9089_DS1.pdf
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Predicting near-ground vortex lifetimes using Weibull density functions

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