NWRA AVOSS Wake Vortex Prediction Algorithm (original) (raw)

Wake vortex algorithm scoring results

2002

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Aircraft Wake Vortex State-of-the-Art & Research Needs

2015

This report has been compiled by the partners of the WakeNet3-Europe consortium with the support of several external experts. It describes the present international state-of-the-art in wake vortex research and application – focusing on recent developments in the various involved disciplines – and specifically evaluates research activities needed in order to provide operational benefits in line with ongoing SESAR developments, in response to ACARE goals and following Europe’s vision for aviation, Flightpath 2050.

Summary description of the models used in the Vortex Forecast System (VFS)

Univ. Catholique de Louvain, Louvain-la-Neuve, Belgium, 2005

This document provides a brief description of the Vortex Forecast System (VFS) principles and the different models used. The VFS is a deterministic and operational wake vortex predictor (transport and decay) previously developed by an international team (partners from Russia (SABIGO), Canada and Belgium) under contract with Transport Canada (TC) and its Transportation Development Center (TDC). The VFS as it was at the end of the TC/TDC funded project is described in . It is continuously enhanced, also by research conducted at Université catholique de Louvain (UCL), Belgium, in the Division TERM (group of Prof. G. Winckelmans). This document presents the VFS version as of April 1 2005, thus including the improvements added by UCL after completion of the TC/TDC funded project. It was written for "open communication" purposes: so as to clearly explain the global approach and the models implemented so far.

Status of Onera Research on Wake Vortex in the Framework of National Activities and European Collaboration

wakenet.eu

This document provides a synthesis of recent experimental research studies conducted at ONERA, aiming at a better characterisation of aircraft wake vortex and its control. Thus, either generic, two-engine or four-engine transport aircraft-type models have been considered in existing complementary facilities from ONERA, being the most appropriate for scrutinizing different stages of wake evolution. Main results from several research programmes are discussed. They have been obtained both from National and European activities, although emphasis has been set on the 5 th Framework Programme project "C-Wake: Wake Vortex Characterisation and Control".

Atmospheric-wake vortex interactions

1978

Lastly, the "WAKE" code has been updated, including new algorithms to improve accuracy and speed. In particular, the original primitive variable formulation has been replaced by a stream function-vorticity formulation, thereby eliminating previous numerical problems with regard to maintaining divergencefree flow.

Comparison of Numerical Model Simulations and SFO Wake Vortex Windline Measurements

21st AIAA Applied Aerodynamics Conference, 2003

To provide quantitative support for the Simultaneous Offset Instrument Approach (SOIA) procedure, an extensive data collection effort was undertaken at San Francisco International Airport by the Federal Aviation Administration (FAA, U.S. Dept. of Transportation). During the time period from March 2000 to October 2002, wake vortex data was measured for over 260,000 landing aircraft. The data set includes wake vortex measurements from Small, Large, and Heavy category aircraft. The measurements consist of cross-runway wind speed recorded every two seconds from three windlines, comprised of a series of propeller anemometers on three-foot poles near the threshold of runways 28L and 28R. The resulting data set is being used to demonstrate the feasibility of SOIA and to guide the improvement of the wake vortex model in the FAA airspace simulation tool ASAT (Airspace Simulation and Analysis for TERPS). We show that a slightly modified version of the AVOSS (Aircraft VOrtex Spacing System) Prediction Algorithm (APA) produces lateral position predictions that agree well with the windline data. We also show that the data and the APA results agree with results produced by TASS (Terminal Area Simulation System), a numerical code developed by NASA. These comparisons between code and data provide an independent validation of the lateral transport estimates using windline sensors and give us increased confidence in both the data obtained from the windline sensors and our ability to predict vortex evolution using numerical simulations.