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Wake Vortex Advisory System Wakevas Concept Of Operations Nasa Tm 2003 212176 National Aeronautics And Space Administration April
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Book Synopsis WAKE VORTEX ADVISORY SYSTEM (WAKEVAS) CONCEPT OF OPERATIONS... NASA/TM-2003-212176... NATIONAL AERONAUTICS AND SPACE ADMINISTRATION... APRIL. by : United States. National Aeronautics and Space Administration
Download or read book WAKE VORTEX ADVISORY SYSTEM (WAKEVAS) CONCEPT OF OPERATIONS... NASA/TM-2003-212176... NATIONAL AERONAUTICS AND SPACE ADMINISTRATION... APRIL. written by United States. National Aeronautics and Space Administration and published by . This book was released on 2003* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Wake Vortex Advisory System (WakeVAS) Concept of Operations by :
Download or read book Wake Vortex Advisory System (WakeVAS) Concept of Operations written by and published by DIANE Publishing. This book was released on 2003 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781721038695 Total Pages :28 pages Book Rating :4.0/5 (386 download)
Book Synopsis Wake Vortex Advisory System (WakeVAS) Concept of Operations by : National Aeronautics and Space Administration (NASA)
Download or read book Wake Vortex Advisory System (WakeVAS) Concept of Operations written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-12 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: NASA Langley Research Center has a long history of aircraft wake vortex research, with the most recent accomplishment of demonstrating the Aircraft VOrtex Spacing System (AVOSS) at Dallas/Forth Worth International Airport in July 2000. The AVOSS was a concept for an integration of technologies applied to providing dynamic wake-safe reduced spacing for single runway arrivals, as compared to current separation standards applied during instrument approaches. AVOSS included state-of-the-art weather sensors, wake sensors, and a wake behavior prediction algorithm. Using real-time data AVOSS averaged a 6% potential throughput increase over current standards. This report describes a Concept of Operations for applying the technologies demonstrated in the AVOSS to a variety of terminal operations to mitigate wake vortex capacity constraints. A discussion of the technological issues and open research questions that must be addressed to design a Wake Vortex Advisory System (WakeVAS) is included.Rutishauser, David and Lohr, Gary and Hamilton, David and Powers, Robert and McKissick, Burnell and Adams, Catherine and Norris, EdwardLangley Research CenterAIRCRAFT WAKES; VORTEX ADVISORY SYSTEM; VORTICES; NASA PROGRAMS; AIRCRAFT APPROACH SPACING; AIR TRAFFIC CONTROL; ARRIVALS
Book Synopsis Wake Vortex Advisory System (Wake VAS) Concept of Operations by :
Download or read book Wake Vortex Advisory System (Wake VAS) Concept of Operations written by and published by . This book was released on 2003 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781720384502 Total Pages :44 pages Book Rating :4.3/5 (845 download)
Book Synopsis Analysis of Wake Vas Benefits Using Aces Build 3.2.1 by : National Aeronautics and Space Administration (NASA)
Download or read book Analysis of Wake Vas Benefits Using Aces Build 3.2.1 written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-05-29 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: The FAA and NASA are currently engaged in a Wake Turbulence Research Program to revise wake turbulence separation standards, procedures, and criteria to increase airport capacity while maintaining or increasing safety. The research program is divided into three phases: Phase I near term procedural enhancements; Phase II wind dependent Wake Vortex Advisory System (WakeVAS) Concepts of Operations (ConOps); and Phase III farther term ConOps based on wake prediction and sensing. The Phase III Wake VAS ConOps is one element of the Virtual Airspace Modelling and Simulation (VAMS) program blended concepts for enhancing the total system wide capacity of the National Airspace System (NAS). This report contains a VAMS Program Type 1 (stand-alone) assessment of the expected capacity benefits of Wake VAS at the 35 FAA Benchmark Airports and determines the consequent reduction in delay using the Airspace Concepts Evaluation System (ACES) Build 3.2.1 simulator.Smith, Jeremy C.Langley Research CenterAIRSPACE; NATIONAL AIRSPACE SYSTEM; TURBULENCE; VORTEX ADVISORY SYSTEM; WAKES; ATMOSPHERIC SOUNDING; DETECTION; SAFETY; SATELLITE SOUNDING; SIMULATORS
Author :National Aeronautics and Space Adm Nasa Publisher :Independently Published ISBN 13 :9781794256132 Total Pages :32 pages Book Rating :4.2/5 (561 download)
Book Synopsis Documentation for Three Wake Vortex Model Data Sets from Simulation of Flight 587 Wake Vortex Encounter Accident Case by : National Aeronautics and Space Adm Nasa
Download or read book Documentation for Three Wake Vortex Model Data Sets from Simulation of Flight 587 Wake Vortex Encounter Accident Case written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2019-01-18 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document contains a general description for data sets of a wake vortex system in a turbulent environment. The turbulence and thermal stratification of the environment are representative of the conditions on November 12, 2001 near John F. Kennedy International Airport. The simulation assumes no ambient winds. The full three dimensional simulation of the wake vortex system from a Boeing 747 predicts vortex circulation levels at 80% of their initial value at the time of the proposed vortex encounter. The linked vortex oval orientation showed no twisting, and the oval elevations at the widest point were about 20 meters higher than where the vortex pair joined. Fred Proctor of NASA's Langley Research Center presented the results from this work at the NTSB public hearing that started 29 October 2002. This document contains a description of each data set including: variables, coordinate system, data format, and sample plots. Also included are instructions on how to read the data. Switzer, George F. Langley Research Center RTI/8438/006-02F
Book Synopsis Analysis of Wakevas Benefits Using Aces Build 3. 2. 1 by : Jeremy C. Smith
Download or read book Analysis of Wakevas Benefits Using Aces Build 3. 2. 1 written by Jeremy C. Smith and published by BiblioGov. This book was released on 2013-07 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: The FAA and NASA are currently engaged in a Wake Turbulence Research Program to revise wake turbulence separation standards, procedures, and criteria to increase airport capacity while maintaining or increasing safety. The research program is divided into three phases: Phase I near term procedural enhancements; Phase II wind dependent Wake Vortex Advisory System (WakeVAS) Concepts of Operations (ConOps); and Phase III farther term ConOps based on wake prediction and sensing. This report contains an analysis that evaluates the benefits of a closely spaced parallel runway (CSPR) Phase I ConOps, a single runway and CSPR Phase II ConOps and a single runway Phase III ConOps. A series of simulation runs were performed using the Airspace Concepts Evaluation System (ACES) Build 3.21 air traffic simulator to provide an initial assessment of the reduction in delay and cost savings obtained by the use of a WakeVAS at selected U.S. airports. The ACES simulator is being developed by NASA Ames Research Center as part of the Virtual Airspace Modelling and Simulation (VAMS) program.
Book Synopsis Analysis of Wake Vas Benefits Using Aces Build 3. 2. 1 by : Jeremy C. Smith
Download or read book Analysis of Wake Vas Benefits Using Aces Build 3. 2. 1 written by Jeremy C. Smith and published by BiblioGov. This book was released on 2013-07 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: The FAA and NASA are currently engaged in a Wake Turbulence Research Program to revise wake turbulence separation standards, procedures, and criteria to increase airport capacity while maintaining or increasing safety. The research program is divided into three phases: Phase I near term procedural enhancements; Phase II wind dependent Wake Vortex Advisory System (WakeVAS) Concepts of Operations (ConOps); and Phase III farther term ConOps based on wake prediction and sensing. The Phase III Wake VAS ConOps is one element of the Virtual Airspace Modelling and Simulation (VAMS) program blended concepts for enhancing the total system wide capacity of the National Airspace System (NAS). This report contains a VAMS Program Type 1 (stand-alone) assessment of the expected capacity benefits of Wake VAS at the 35 FAA Benchmark Airports and determines the consequent reduction in delay using the Airspace Concepts Evaluation System (ACES) Build 3.2.1 simulator.
Download or read book Wake Vortex Minimization written by and published by . This book was released on 1977 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722937348 Total Pages :48 pages Book Rating :4.9/5 (373 download)
Book Synopsis Viscous Effects on a Vortex Wake in Ground Effect by : National Aeronautics and Space Administration (NASA)
Download or read book Viscous Effects on a Vortex Wake in Ground Effect written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-15 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wake vortex trajectories and strengths are altered radically by interactions with the ground plane. Prediction of vortex strength and location is especially important in the vicinity of airports. Simple potential flow methods have been found to yield reasonable estimates of vortex descent rates in an otherwise quiescent ambient background, but those techniques cannot be adjusted for more realistic ambient conditions and they fail to provide satisfactory estimates of ground-coupled behavior. The authors have been involved in a systematic study concerned with including viscous effects in a wake-vortex system which is near the ground plane. The study has employed numerical solutions to the Navier-Stokes equations, as well as perturbation techniques to study ground coupling with a descending vortex pair. Results of a two-dimensional, unsteady numerical-theoretical study are presented in this paper. A time-based perturbation procedure has been developed which permits the use of analytical solutions to an inner and outer flow domain for the initial flow field. Predictions have been compared with previously reported laminar experimental results. In addition, the influence of stratification and turbulence on vortex behavior near the ground plane has been studied. Zheng, Z. and Ash, Robert L. Unspecified Center NAG1-987...
Book Synopsis Operational System Guidelines for Vortex Advisory System by : E. A. Spitzer
Download or read book Operational System Guidelines for Vortex Advisory System written by E. A. Spitzer and published by . This book was released on 1979 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wake Vortex Minimization written by and published by . This book was released on 1977 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis WAKE VORTEX MINIMIZATION- PROCEEDINGS OF A SYMPOSIUM- NATIONAL AERONAUTICS AND SPACE ADMINISTRATION. by :
Download or read book WAKE VORTEX MINIMIZATION- PROCEEDINGS OF A SYMPOSIUM- NATIONAL AERONAUTICS AND SPACE ADMINISTRATION. written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Adm Nasa Publisher :Independently Published ISBN 13 :9781794009349 Total Pages :36 pages Book Rating :4.0/5 (93 download)
Book Synopsis Vortex Shedding Characteristics of the Wake of a Thin Flat Plate with a Circular Trailing Edge by : National Aeronautics and Space Adm Nasa
Download or read book Vortex Shedding Characteristics of the Wake of a Thin Flat Plate with a Circular Trailing Edge written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2019-01-14 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: The near and very near wake of a thin flat plate with a circular trailing edge are investigated with direct numerical simulations (DNS). Data obtained for two different Reynolds numbers (based on plate thickness, D) are the main focus of this study. The separating boundary layers are turbulent in both cases. An earlier investigation of one of the cases (Case F) showed shed vortices in the wake that were about 1.0 D to 4.0 D in spanwise length. Considerable variation in both the strength and frequency of these shed vortices was observed. One objective of the present investigation is to determine the important contributors to this variability in strength and frequency of shed vortices and their finite spanwise extent. Analysis of the data shows that streamwise vortices in the separating boundary layer play an important role in strengthening/weakening of the shed vortices and that high/low-speed streaks in the boundary layer are important contributors to variability in shedding frequency. Both these features of the boundary layer contribute to the finite extent of the vortices in the spanwise direction. The second plate DNS (Case G, with 40 percent of the plate thickness of Case F) shows that while shedding intensity is weaker than obtained in Case F, many of the wake features are similar to that of Case F. This is important in understanding the path to the wake of the thin plate with a sharp trailing edge where shedding is absent. Here we also test the efficacy of a functional relationship between the shedding frequency and the Reynolds numbers based on the boundary layer momentum thickness (Re (sub theta) and D (Re (sub D)); data for developing this behavioral model is from Cases F & G and five earlier DNSs of the flat plate wake. Rai, Man Mohan Ames Research Center NASA/TM-2018-219752, ARC-E-DAA-TN52073
Author :National Aeronautics and Space Adm Nasa Publisher :Independently Published ISBN 13 :9781728916453 Total Pages :26 pages Book Rating :4.9/5 (164 download)
Book Synopsis Vortex Wakes of Rotorcraft by : National Aeronautics and Space Adm Nasa
Download or read book Vortex Wakes of Rotorcraft written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-10-18 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper presents an overview of the complex unsteady vortical flows that comprise the wakes of rotary-wing aircraft; of the effects these tangled vortical structures have on the performance, noise, and vibration; and of some of the recent attempts to measure, predict, and control the phenomena. The main points are illustrated with a number of examples from the recent literature and technical conferences. Mccroskey, W. J. Ames Research Center
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781721212644 Total Pages :30 pages Book Rating :4.2/5 (126 download)
Book Synopsis A Note on Trapping Moving Vortices by : National Aeronautics and Space Administration (NASA)
Download or read book A Note on Trapping Moving Vortices written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-15 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: The topic of stationary configurations of point vortices, also known as vortex equilibrium, has received considerable attention in recent years. By observing numerical results, it is found that a "counterpart" of this system also exists, in which moving vortices may be "trapped" by an inlet-like device to form a stationary pattern with no translational motion. After an intuitive explanation for the process, vortex trajectory maps based on numerical results are presented. These maps exhibit two stationary points under the present conditions, which are the focal points of vortex trajectories. A vortex upstream of these points, if within a certain offset range, will move towards these points spontaneously and be captured there. This proposed device is also capable of trapping spinning vortex pairs and triads. It is possible to impose a uniform stream at infinity, as long as the flow field is still dominated by the moving vortices. Kao, Hsiao C. Glenn Research Center NASA/TM-2000-209270, E-11720, NAS 1.15:209270
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781725627840 Total Pages :32 pages Book Rating :4.6/5 (278 download)
Book Synopsis An Experimental Investigation of the Parallel Blade-Vortex Interaction by : National Aeronautics and Space Administration (NASA)
Download or read book An Experimental Investigation of the Parallel Blade-Vortex Interaction written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-16 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: A scheme for investigating the parallel blade vortex interaction (BVI) has been designed and tested. The scheme involves setting a vortex generator upstream of a nonlifting rotor so that the vortex interacts with the blade at the forward azimuth. The method has revealed two propagation mechanisms: a type C shock propagation from the leading edge induced by the vortex at high tip speeds, and a rapid but continuous pressure pulse associated with the proximity of the vortex to the leading edge. The latter is thought to be the more important source. The effects of Mach number and vortex proximity are discussed. Caradonna, F. X. and Laub, G. H. and Tung, C. Ames Research Center NASA-TM-86005, A-9850, NAS 1.15:86005, USAAVSCOM-TM-84-A-9 RTOP 992-21-01...
