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Thursday, May 21, 2020 | History

2 edition of Wake geometry measurements and analytical calculations on a small-scale rotor model found in the catalog.

Wake geometry measurements and analytical calculations on a small-scale rotor model

Wake geometry measurements and analytical calculations on a small-scale rotor model

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  • 13 Currently reading

Published by National Aeronautics and Space Administration, Langley Research Center, National Technical Information Service, distributor in Hampton, Va, [Springfield, Va .
Written in English

    Subjects:
  • Wakes.,
  • Vortices.,
  • Rotors.,
  • Rotary wings.,
  • Horizontal flight.,
  • Scientific visualization.,
  • Airfoil profiles.,
  • Blade tips.,
  • Helicopters.,
  • Light beams.,
  • Laser outputs.

  • Edition Notes

    StatementTerence A. Ghee ... [et al.].
    SeriesNASA technical paper -- 3584.
    ContributionsGhee, Terence A., Langley Research Center.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15504420M

    Moreover, the versatility of integrated combustion-based systems provides added scope for combined heat and power generation. This paper describes a study into the dynamics of premixed flames in a micro-channeled combustor. The details of the design and the geometry of the combustor are presented in the work by Kariuki and Balachandran [1]. Annular centrifugal extractors (ACE), also called annular centrifugal contactors offer several advantages over the other conventional process equipment such as low hold-up, high process throughput, low residence time, low solvent inventory and high turn down ratio. The equipment provides a very high value of mass transfer coefficient and interfacial area in the annular zone because of the high Cited by:

    aerodynamic wake of the rotor's central column in a manner similar to the way that a downwind HAWT rotor interacts with its tower wake, but at a greater distance relative to the column diameter. Thus, the magnitude of the noise from a VAWT caused by this inter-action is expected to be less than that of an equivalent downwind HAWT rotor and greater. Sampath K, Uppaluri SK, Katz J, Shin YS, Sortor M (). Phase locked PIV measurements in wake of an automotive fan model. FAN - International Conference on Fan Noise, Technology and Numerical Methods. April. Hah C, Hathaway M, Katz J, Tan D ().

    A parametric experimental study of jet-flap interaction noise for a realistic small-scale swept wing model. Ivan V. Belyaev A 3D analytical approach for Open rotor Blade Vortex Interaction(BVI) tonal noise in the cabin and the definition of the local passage of sound energy through fuselage based on the results of in-flight measurements. There is a link between pressure pulsations in the centrifugal ventilator working cavity and its noise level on blade passing frequencies (BPF) They result from non-stationary hydrodynamic interaction between the impeller flow and volute casing. Pressure pulsations depend on quality of hydraulic profiling of ventilator. The amplification of pressure pulsations can happen due to matching of Author: Sergey Timushev.


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Wake geometry measurements and analytical calculations on a small-scale rotor model Download PDF EPUB FB2

Wake Geometry Measurements and Analytical Calculations on a Small-Scale Rotor Model Terence A. Ghee Analytical Services & Materials, Inc. • Hampton, Virginia John D. Berry Joint Research Program Office Aeroyqightdynamics Directorate U.S.

Army Aviation and Troop Command Langley Research Center • Hampton, Virginia Laith A. ZoriFile Size: 2MB. Wake Geometry Measurements and Analytical Calculations on a Small-Scale Rotor Model Terence A.

Ghee Analytical Services & Materials, Inc. • Hampton, Virginia John D. Berry Joint Research Program Office Aeroflightdynamics Directorate U.S. Army Aviation and Troop Command Langley Research Center • Hampton, Virginia Laith A. Zori. Wake Geometry Measurements and Analytical Calculations on a Small-Scale Rotor Model Technical Report (PDF Available) August with Reads How we measure 'reads'.

BibTeX @MISC{Ghee96wakegeometry, author = {Terence A. Ghee and John D. Berry and Laith A. Zori and Joe W. Elliott}, title = {Wake Geometry Measurements and Analytical Calculations on a Small-Scale Rotor Model}, year = {}}. Get this from a library.

Wake geometry measurements and analytical calculations on a small-scale rotor model. [Terence A Ghee; Langley Research Center.;].

Instantaneous Doppler Global Velocimetry Measurements of a Rotor Wake: Lessons Learned. Authors; Zori, L.A.J., and, Elliott, J.W.,Wake Geometry Measurements and Analytical Calculations on a Small-Scale Rotor Model.

NASA TPATCOM TRA Google Scholar. Komine, H.,System for Measuring Velocity Field of Fluid Flow Cited by: 8. Wake geometry measurements and analytical calculations on a small-scale rotor model [microform] [] Hampton, Va.: National Aeronautics and Space Administration, Langley Research Center ; [Springfield, Va.: National Technical Information Service, distributor, ].

An experimental investigation was conducted in the Langley by Foot Subsonic Tunnel to quantify the rotor wake behind a scale model helicopter rotor in forward level flight at one thrust : Akane Kanai. The overall method is initially employed to assess the effect of wake curvature on the dynamic response of a small-scale articulated rotor with a flap frequency ratio equal to unity.

Subsequently, the integrated model is deployed to investigate the influence of wake curvature and inflow modeling fidelity on the predicted oscillatory blade loads Author: Ioannis Goulos.

IMPACT OF ROTOR DESIGN ON COAXIAL ROTOR PERFORMANCE, WAKE GEOMETRY AND NOISE heavy lift, high speed and small-scale applications. A variety of platforms are under investigation, including small compilation of experimental and analytical studies of coaxial rotors to date.

Since the bulk of these are over. Impact of Wake Structure Characteristics on Small-Scale Rotor Performance over a Range of Reynolds Numbers Authors / Details: Mark L. Sutkowy Jr., Braxton Harter, Matthew H. McCrink, James W. Gregory, The Ohio State UniversityAuthor: Mark L.

Sutkowy, Braxton Harter, Matthew H. McCrink, James W. Gregory. The second part of this work describes a wind turbine Computational Fluid Dynamics (CFD) simulation capable of modeling wake effects. The work is intended to establish a computational framework from which to investigate wind farm layout.

Following the first part of this work that described the near wake flow field, the physical domain of the validated model in the near wake was adapted and Author: Rafael V. Rodrigues, Corinne Lengsfeld. The entire wake region is covered in the measurements of the CFR system, so the wake edges and the averaged velocities and turbulence intensities therein can be calculated.

The results are given in Fig. The wake edge, on which U/U 0 =is a demarcation Cited by: Blade displacement measurements are used to resolve rotor blade shape and position, including blade pitch, flap, lag and elastic deformations.

When combined with blade airloads and wake measurements, a comprehensive dataset is formed that directly relates rotor performance to File Size: 6MB.

Wind turbine wake aerodynamics. Author links open overlay panel L.J. Vermeer a J.N. Sørensen b A. Crespo c. Show more. By using the wake geometry, as deduced from the measurements, a set of equations can be build to express the wake velocities. This model divides the wake into the rotor region, the near wake region and the far wake Cited by: The operation of the wind turbines downstream is affected by the wake of the wind turbines upstream.

Wind turbine wake flow is investigated by applying the actuator disc (AD) method. The modified k-ε turbulence model is proposed by using both the turbulent kinetic energy source term and the dissipation rate source term to improve the standard k-ε turbulence model for coordinating the Cited by: 2.

An experimental and numerical study of the performance of a model turbine. Experimental and numerical investigation on aerodynamic performance of a novel disc-shaped wind rotor for the small-scale wind turbine Experiments in the wind turbine far wake for the evaluation of an analytical wake model, Journal of.

A revised Sandia V27 reference model is provided for use with the wind turbine analysis code, FAST, incorporating refined parameters based on blade geometry measurements and performance data collected during the wake steering campaign at the. Takeshi Ishihara and Guo-Wei Qian, A new Gaussian-based analytical wake model for wind turbines considering ambient turbulence intensities and thrust coefficient effects, Journal of Wind Engineering and Industrial Aerodynamics, /,(), ().

The objective of the thesis is to establish methodology for development of a wind turbine, simple in design and easy to maintain, for possible application in developing countries. To that end the Savonius configuration is analyzed in detail both experimentally and analytically to lay a sound foundation for its performance evaluation.

Following a brief review of relevant significant Cited by: 7. Aerodynamics of wind turbine wakes Literature review B. Sanderse ECN-e Abstract This report reviews the available literature on the aerodynamics of wind turbines and wind farms.

Firstly, two introductory chapters are devoted to the physics of the flow around a wind turbine and the existing engineering models for blade and wake aerodynamics.The book is organized into three sections, Inflow and Wake Influences onTurbine Performance, Turbine Structural Response, and Power Conversion, Control andIntegration.

In addition to fundamental concepts, the reader will be exposed tocomprehensive treatments of topics like wake dynamics, analysis of complex turbine blades,and power electronics.topographical maps are old and for remote areas or if the maps are small scale such as (1 in = mi) or scale (1 in = 1 mi).

Both scales are too small to accurately determine the position of a point. Instead, maps with scale or higher should be used.

The most accurate way of determining the position,File Size: KB.