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Tuesday, April 21, 2020 | History

3 edition of Reynolds number effects on the performance of lateral control devices found in the catalog.

Reynolds number effects on the performance of lateral control devices

Raymond E. Mineck

Reynolds number effects on the performance of lateral control devices

  • 85 Want to read
  • 35 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:
  • Reynolds number.,
  • Ailerons.,
  • Spoilers.,
  • Lateral control.

  • Edition Notes

    StatementRaymond E. Mineck.
    Series[NASA technical memorandum] -- NASA/TM-2000-210541., NASA technical memorandum -- 210541.
    ContributionsLangley Research Center.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL16012031M

    The steady-state Reynolds number was Re = , which may be compared to a Reynolds number of that would be obtained for a single spherical bubble with the same Galileo number (Clift et al ). This comparison is of interest because, despite the finite Eö tv ös number, the bubbles in the simulation were found to be relatively by: Organised and written as an accessible study guide for student pilots wishing to take commercial ground examinations to obtain ATPL or CPL licenses, Principles of Flight for Pilots also provides a reliable up-to-date reference for qualified and experienced personnel wishing to further improve their understanding of the Principles of Flight and related subjects. Commune A.D. by Mack Reynolds Published in , Mack Reynolds' novel, Commune A.D. depicts a North America in which 90 percent of the population is unemployed and on government assistance, and yet everyone leads a comfortable lifestyle, with plenty of food, beautiful spacious housing, efficient public transportation, and an array of electronic devices (including what we would /5(2).


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Reynolds number effects on the performance of lateral control devices by Raymond E. Mineck Download PDF EPUB FB2

Get this from a library. Reynolds number effects on the performance of lateral control devices. [Raymond E Mineck; Langley Research Center,] -- The influence of Reynolds number on the performance of outboard spoilers and ailerons was investigated on a generic subsonic transport configuration in the National Transonic facility over a chord.

Reynolds number effects on the performance of lateral control devices (OCoLC) Online version: Mineck, Raymond E. Reynolds number effects on the performance of lateral control devices (OCoLC) Material Type: Government publication, National government publication: Document Type: Book: All Authors / Contributors.

Download Citation | Reynolds Number Effects on the Performance of Lateral Control Devices | The influence of Reynolds number on the performance of outboard spoilers and ailerons was investigated Author: Raymond E.

Mineck. The influence of Reynolds number on the performance of outboard spoilers and ailerons was investigated on a generic subsonic transport configuration in the National Transonic Facility over a chord Author: Raymond E.

Mineck. The Reynolds number (Re) is an important dimensionless quantity in fluid mechanics used to help predict flow patterns in different fluid flow situations. At low Reynolds numbers, flows tend to be dominated by laminar (sheet-like) flow, while at high Reynolds numbers turbulence results from differences in the fluid's speed and direction, which may sometimes intersect or even move counter to the.

SummaryThe Reynolds-number effects on the performance of a single-stage compressor have been measured over the range × to × The tests were carried out in a variable-density return-circuit rig and the Reynolds number varied partly by fluid density and partly by Size: 1MB.

Report presenting an investigation of the Reynolds number effects on an axial-flow compressor with two of the transonic inlet stages doubled as compared to the original compressor.

Reynolds number effects on the performance of lateral control devices book Results regarding the long-chord-compressor performance, effect of Reynolds number on compressor performance, and a comparison of long- and medium-chord compressor performance are by: 1. dependent on Reynolds Number as well as the flight Mach number.

The Reynolds number consequently is the primary aerodynamic scaling parameter used to relate sub-scale wind tunnel model experiments to Reynolds number effects on the performance of lateral control devices book scale airplanes in flight.

A number of recent investigations have focused on the effe cts of Reynolds number on HSCT type configurations inFile Size: 4MB.

Low Reynolds Number Flows and Transition. By Reynolds number effects on the performance of lateral control devices book. Serdar Genç, İlyas Karasu, H. Hakan Açıkel and M. Tuğrul Akpolat. Submitted: March 26th Reviewed: February 15th Published: April 4th DOI: /Cited by: The effect of Reynolds and Mach number variation in compressible isothermal channel flow is investigated through a series of direct numerical simulations (DNS), at bulk Mach number M b =3 and bulk Reynolds number up to Re b =which is sufficient to sense sizeable high-Reynolds-number effects not reached before in this type of flow.

Dedicated incompressible DNS are also Cited by: How are Wind Tunnels used to design and test aircraft. Calibration 'Reynolds number effects on the performance of lateral control devices' -- subject(s): Reynolds number, Spoilers, Lateral.

The Strouhal number (S) is a dimensionless number that defines the quality of the vortex flow rate measurements and bears a relationship with Reynolds number as shown in graph of Figure IV/ b, which is moderately constant in a long stretch of Reynolds number. Reynolds number can be expressed as Re = υ × D/э, where D is the inner pipe.

The performance is evaluated at four Reynolds numbers i.e. 825 and 1 using CFD. From the study, it is observed that any angular offset of the cone axis has negligible Reynolds number effects on the performance of lateral control devices book on the performance of the cone flowmeter whereas lateral offset has significant effect.

Keywords: Off-set, b-value, lateral, flowmeter, discharge. Ref. Mach number effects were specifically avoided in the experimental work although a wide range of Reynolds number ( × 10 ~ to × l0 s) was covered; tile effects of'compressibility have not, therefore, been considered in the main analysis.

the Reynolds number effect of the wind turbine profiles were presented. The Reynolds number effect is different from model to model. Especially for thick profiles and flow control devices the Reynolds number effect is not always like the description in literature.

Another work in this area is the aeroacoustic by: 2. Work over the past decade has verified the strong influence of Reynolds number on aerodynamic performance of high-lift systems—aerodynamic performance of high-lift systems in many cases does not scale predictably with Reynolds number.

technology advances in the fundamental understanding of high Reynolds number effects on leading-edge. This book covers the basic principles of flight theory in both low and high speed regimes.

Airflow theory, airfoil design, high lift devices, induced and parasitic drag, stall patterns, climb and sink performance, thrust and power, control & stability are all covered in subsonic, transonic, and supersonic conditions. Reynolds number influence on wing stall 3. SWEPTBACK WINGS Some Early Research Some Types of Flow Tip stall Leading-edge separation bubble Leading-edge vortex lift General Effects of Sweep and Reynolds Number Predictions of turbulent reseparation Overall lift characteristics Summary of File Size: 3MB.

CONCLUSIONS Wind tunnel study was carried out on aerodynamic behavior of 2-D sectional models for various azimuth angles in the Reynolds number range between × and × for a kilometer-height skyscraper, and predicting wind loads at high Reynolds number by increasing surface roughness and flow turbulence.

MAE Virtual Reference Book. Introduction, Math Preliminaries. Aircraft - Wikipedia, the free encyclopedia Reynolds number - Wikipedia, the free encyclopedia Parasitic drag - Wikipedia, the free encyclopedia Control Devices and Systems.

Flight control surfaces - Wikipedia, the free encyclopedia Rudder - Wikipedia, the free. Laboratory tests were conducted at the Irrigation Devices and Equipment’s Test Laboratory, Agricultural Engineering Research Institute, Agriculture Research Center, Giza, Egypt.

The experimental design of laboratory experiments was split in randomized complete block design with three replicates. Laboratory tests carried out on three irrigation lateral lines of 40, 60, 80 m under the Cited by: 6. large Reynolds number range is required. Following a compre-hensiveoverview of scale effects in high-lift low-speed flows in[4], basically four sources of direct scale effects are identified: First, conventional scale effects, which are associated with the reduction ofthe boundary-layer thickness with increasing Reynolds number, are identified.

The past two decades (approximately to ) have witnessed an ever-quickening pace of new findings pertaining to the Reynolds number dependencies, scaling, and dynamics of turbulent boundary layer flows (and wall-bounded turbulent flows in general).Cited by: defined as the cube root of the Prandtl number.

Reynolds Number Measurement The Reynolds number is based on the axial chord and the exit conditions: Re = C (pV)exit (3) A where C is the chord length, p is the fluid density, V is the fluid velocity, and µ is the dynamic viscosity, ( File Size: 7MB.

The present paper addresses experimental studies of Reynolds number effects on a turbulent boundary layer with separation, reattachment, and recovery. A momentum thickness Reynolds number varies from 1, to 20, with a wind tunnel enclosed in a pressure vessel by varying the air density and wind tunnel speed.

A custom-built, high-resolution laser Doppler anemometer provides Cited by: The objective of the study was the characterization of the off- design flow and the detailed investigation of flow separation which occurred near midchord.

When it was found that the flow separation behavior was strongly influenced by the Reynolds number, the effect of Reynolds number variation on flow separation was : David G. Schnorenberg. Reynold number (Fluid Mechanics)(FM) eBook is an electronic version of a traditional print book THIS can be read by using a personal computer or by using an eBook reader.

(An eBook reader can be a software application for use on a computer such as Microsoft's free Reader application, or a book-sized computer THIS is used solely as a reading.

A review of some effects of Reynolds number on selected aerodynamic characteristics of two- and three-dimensional bodies of various cross sections in relation to fuselages at high angles of attack at subsonic and transonic speeds is presented.

ABSTRACT: Force and surface pressure measurements on a 2D rough circular cylinder were carried out over a wide range of Reynolds numbers in the high-pressure wind tunnel in Göttingen. The Reynolds number spanned values from subcritical up to high transcritical 15× ≤ Re ≤ 12× The cylinder had a mean relative surface roughness of kFile Size: 5MB.

This paper presents the two-dimensional (2D) steady incompressible flow in a lid-driven sectorial cavity. In order to analyze the flow structures, the 2D Navier–Stokes equations are solved by using the finite element method. Different cases of the cavity aspect ratio A and three cases of the speed ratios $$(S=-1,0,1)$$ of the upper and the lower lids are : Halis Bilgil, Fuat Gürcan.

test. Thus, performance prediction in full scale implies scaling of the open water propulsor characteristics to account for the effect of Reynolds number.

A number of engineering methods are known to be applied to this problem (Hotrop, ), (Mewis & Praefke, ), (Sasaki et al, ). These methods vary in degree of complexity,File Size: 3MB.

and results focus on the Reynolds number. Solutions are given for a depth-to-width aspect ratio of and a span-to width aspect ratio of Upon increasing the Reynolds number, the flows in the cavity of interest were found to comprise a transition from a strongly two-dimensional character to a truly.

Reynolds number effects in a turbulent pipe flow for low to moderate Re J. den Toondera) and F. Nieuwstadt Laboratory for Aero- and Hydrodynamics, Delft University of Technology, RotterdamsewegAL Delft, The Netherlands ~Received 31 July ; accepted 19 June. In fluid dynamics, drag (sometimes called air resistance, a type of friction, or fluid resistance, another type of friction or fluid friction) is a force acting opposite to the relative motion of any object moving with respect to a surrounding fluid.

This can exist between two fluid layers (or surfaces) or a fluid and a solid surface. Unlike other resistive forces, such as dry friction, which. PHYSICS OF FLUIDS25, () Reynolds-number scaling of turbulent channel flow M.

Schultz1 and K. Flack2 1Department of Naval Architecture and Ocean Engineering, United States Naval Academy, Annapolis, MarylandUSA 2Department of Mechanical Engineering, United States Naval Academy, Annapolis, MarylandUSA. Reynolds numbers at a reasonable computational cost.

The simulations reveal that increasing Reynolds number has a strong de-stabilizing e ect for staggered arrays. On the other hand, for the in-line array case Reynolds number still a ects the instability threshold, but the e ect is not monotonic with increasing Reynolds by: 6. PDF Printer Version ( KB) Document issued on: J For questions regarding this document, contact CAPT Victoria Hampshire, VMD, Office of Device Evaluation, at.

The cross flow component at the propeller planes can effectively produce side force affecting the lateral motion of the ship. It can be concluded from the simulations that the bilge keels have great influence on the wake distributions at the propeller planes and can affect the propeller performance during maneuvering in terms of hydrodynamic Cited by: 4.

After digging through the Help file, I have found many topics about the low Reynolds model, such as the required node refinement (at least 15 within the boundary layer for the low Re model, or 10 for the automatic wall function model), but I can't.

How is 'momentum thickness Reynolds number' defined. For pipe, diameter is always used to compute the Reynolds number. But 'momentum thickness Reynolds number' is computed by the momentum thickness.

So shall I suppose the 'momentum thickness Reynolds number' of a pipe is much smaller than the pipe Reynolds number computed by the diameter?. control effectiveness for a variety of high-lift /control devices. High-lift/control pdf is generally in terms of the incremental effects due to deflection.

The user must integrate these incremental effects with the “basic” configuration output. Certain Datcom methods applicable to .A design philosophy for low Reynolds number airfoils that judiciously combines the tailoring of the airfoil pressuredistribution using atransition ramp with irfoils with systematicchanges to the shapeof the transition ramp havebeen designed to study the effect of tripson theairfoil performance.Reynolds stress equation model ebook, also referred to as second moment closures are the most complete classical turbulence these models, the eddy-viscosity hypothesis is avoided and the individual components of the Reynolds stress tensor are directly computed.