Last edited by Meztijin
Thursday, August 6, 2020 | History

3 edition of Prediction of compliant wall drag reduction, part I found in the catalog.

Prediction of compliant wall drag reduction, part I

Steven A. Orszag

Prediction of compliant wall drag reduction, part I

by Steven A. Orszag

  • 77 Want to read
  • 0 Currently reading

Published by National Aeronautics and Space Administration, Scientific and Technical Information Office, for sale by the National Technical Information Service in [Washington], Springfield, Va .
Written in English

    Subjects:
  • Drag (Aerodynamics)

  • Edition Notes

    StatementSteven A. Orszag ; Cambridge Hydrodynamics, inc
    SeriesNASA contractor report ; NASA CR-2911, NASA contractor report -- NASA CR-2911
    ContributionsUnited States. National Aeronautics and Space Administration. Scientific and Technical Information Office, Langley Research Center, Cambridge Hydrodynamics, inc
    The Physical Object
    Paginationiii, 38 p. :
    Number of Pages38
    ID Numbers
    Open LibraryOL14929924M

    drag reduction and improving low speed performance. The research involves I -wind tunnel experiments, theoretical analyses, and flight demonstra- tions.:I DRAG REDUCTION.- The research on drag reduction are discussed in 1 terms of the following technological areas: 1 ** Skin friction, both laminar and turbulent, and including.   Game of Thrones: "Beyond the Wall" - Dragons on the Wall by IGN. Game of Thrones: Is Cersei Manipulating Jaime? - Dragons on the Wall by IGN. Game of Thrones: "The Book of the Stranger" - Dragons on the Wall by IGN. Game of Thrones - Jaime's Become an Unfocused Character - Dragons on the Wall.

    Investigation of Simple Possibilities for Reduction of Drag due to the Wheels of Road Vehicles [22], [24] it was found that major part of the drag increase due to the addition of wheels and wheelhouses to a vehicle body is generated on the lower portion of the wheels As a first step for the drag reduction studies, seven configurations were. The CAFE Foundation is a research organization with a 30 year history in testing and evaluation of small aircraft. CAFE is currently engaged as the host of NASA's PAV Centennial Challenge, a 5 year, US $2M innovation prize aimed at fostering a new vision for small aircraft travel in the United States. CAFE also hosts the Annual Electric Aircraft Symposium which brings together experts in the.

    -Major interest is in the prediction of drag increments-Use “standard” processes as much as possible Acknowledgement None of this work would have been possible without the considerable contributions of: N. Jong Yu Tsu-Yi Bernard Su Tsong-Jhy Kao Senthan Swaminathan Moeljo Hong. Journal of Sotmd and Vibration () 34(3), AN EXPERIMENTAL STUDY OF TURBULENT FLOWS OVER COMPLIANT SURFACESt R. J. HANSEN AND D. L. HUNSTON Natal Research Laboratory, lVashington, D.C. , U.S.A. (Received 27 September ) The interaction of a turbulent boundary layer with a compliant surface is studied experimentally in a rotating disk by:


Share this book
You might also like
Baby Kermits Christmas

Baby Kermits Christmas

Tax guide for incorporating a closely held business

Tax guide for incorporating a closely held business

Guide to suppliers of commercially available books-on-cassette in languages other than English or French

Guide to suppliers of commercially available books-on-cassette in languages other than English or French

English literature and society in the eighteenth century

English literature and society in the eighteenth century

Guide to good practices for WWW authors

Guide to good practices for WWW authors

Interferometric data for a shock-wave/boundary-layer interaction

Interferometric data for a shock-wave/boundary-layer interaction

Chasing Mirages by Jack Dukes (2003)

Chasing Mirages by Jack Dukes (2003)

South East in figures

South East in figures

Evolution of social protection in the member states during the year 1999.

Evolution of social protection in the member states during the year 1999.

Brewers, bottlers and soft drink manufacturers.

Brewers, bottlers and soft drink manufacturers.

Mixed bag

Mixed bag

A Night in the swamp

A Night in the swamp

Tribute to Nash

Tribute to Nash

Bayesian data analysis

Bayesian data analysis

Prediction of compliant wall drag reduction, part I by Steven A. Orszag Download PDF EPUB FB2

Prediction of compliant wall drag reduction, part II. [Washington]: National Aeronautics and Space Administration, Scientific and Technical Information Office ; Springfield, Va.: For sale by the National Technical Information Service, (OCoLC) Material Type: Government publication, National government publication: Document Type.

Prediction of compliant wall drag reduction, part I. [Washington]: National Aeronautics and Space Administration, Scientific and Technical Information Office ; Springfield, Va.: For sale by the National Technical Information Service, (OCoLC) Material Type: Government publication, National government publication: Document Type: Book.

Abstract. Compliant coating research is one of those areas which experienced its part I book share of triumphs and debacles. For over forty years, the subject has fascinated, frustrated and occasionally gratified scientists and engineers searching for methods to delay laminar-to-turbulence transition, to reduce skin-friction drag in turbulent wall-bounded flows, to quell vibrations, and to suppress Cited by: A prediction of drag reduction by entrapped gases in hydrophobic transverse grooves Article (PDF Available) in Science China Technological Sciences 56(12) December with 80 Reads.

Aircraft Drag Reduction: An Overview The FCSD is a micro-structured compliant wall. 11 The concept of the blended winglet is to modify a large part of the wing tip together with the.

Drag reduction (DR) agents are used at very low concentrations to accelerate significantly the flow in oil pipeline conduits, oil well operations, flood water disposal, fire fighting, field irrigation, transport of suspensions and slurries, sewer systems, water heating and cooling systems, airplane tank filling, marine systems, and biomedical systems including blood by: The part at the top is the right hand side baffle that runs along the top of the cylinders above the valve covers.

Rubber sheet was added to close off gaps found along the tops of the cylinder heads. The pieces in the front are the baffle pieces that go across the rear File Size: KB. mic "Law of the Wall" U = (U./Ic)tnx (x is the von Karman constant), with a spectrum of turbulent eddys of size v31/4/Us File Size: 1MB.

Abstract. Drag reduction capabilities of compliant coatings has long been of a verification issue in experimental fluid mechanics. In this paper, an optimal flow velocity range leading to maximum interaction between coatings and the flow is predicted based on viscoelastic material properties : Inwon Lee, Andrey V.

Boiko, Victor M. Kulik. Drag Reduction Fundamentals Drag reduction by dilute solutions of linear, random-coiling macro- molecules in turbulent pipe flow is reviewed. The experimental evidence is emphasized in three sections concerned with the graphical display of estab- lished features of the phenomenon, data correlation and analysis, and the.

E- High cruise speed. Note that at high speeds induced drag is a very small part of the total drag which is now overwhelming dominated by parasitic drag.

F- At speeds corresponding to a Mach number greater than aboutcompressibility effects start becoming significant as do aerodynamic heating effects that can affect your OAT Size: 1MB. Numerical Studies of Laminar and Turbulent Drag Reduction R.

Balasubramanian and S. Orszag Cambridge Hydrodynamics, Inc. Cambridge, Massachusetts Prepared for Langley Research Center under Contract NAS National Aeronautics and Space Administration Scientific and Technical Information Branch Description.

Drag reducing agents can be broadly classified under the following four categories – Polymers, Solid-particle suspensions, Biological additives, and agents are made out of high molecular weight polymers or micellar systems.

The polymers help with drag reduction by decreasing turbulence in the oil lines. This allows for oil to be pumped through at lower.

Janu©. Leeham Co: In the last Corner we described a dominant drag component affecting the Wright Brothers’ Flyer, Form many wires and braces on the Flyer created separations and a high Form drag was the result.

At the time, Langley and others thought friction drag could be neglected. Contracts, Grants and Sponsored Research Ash, R. "Mars Sample Return Earth Entry Vehicle Design" $36, Other. Septem - Ma The drag reduction system (or DRS) is a form of driver-adjustable bodywork aimed at reducing aerodynamic drag in order to increase top speed and promote overtaking in motor racing.

It is an adjustable rear wing of the car, which moves in response to driver commands. DRS often comes with conditions, such as the pursuing car must be within a second (when both cars cross the detection.

INTRODUCTION The resistance of bodies moving in a fluid medium (drag) is a subject of considerable interest to the aircraft designer so much so that regular symposia (national and international) are held to discuss the efficiency of modern designs and exchange ideas on the relative merits of various drag reducing devices (see Ref.

1, e.g With the development of world’s economy, energy shortage gradually appears. Resistance has a great influence on energy consumption. In other words, drag reduction means saving energy.

Development of the drag reduction technology plays a very important role to improve the energy efficiency.

Therefore, drag reduction technology of jet has become a hot research by: 1. DRAG REDUCTION FUNDAMENTALS. Drag reduction by dilute solutions of linear, random-coiling macromolecules in turbulent pipe flow is reviewed. The experimental evidence is emphasized in three sections concerned with the graphical display of established features of the phenomenon, data correlation and analysis, and the physical mechanism of drag reduction.

Concerning aircraft efficiency - relevant to the present research - a reduction in aircraft drag of 10%, a reduction in aircraft fuel consumption of 30%, and a reduction in airframe, engine and system weight of 20% are envisaged.

Meeting these objectives has, of course, also a strong positive impact on the environment. show more. European Drag Reduction and Flow Control Meeting MarchHaus der Kirche, Bad Herrenalb, GERMANY.

ERCOFTAC Special Interest Group (SIG20) - Drag Reduction and Flow Control and the Institute of Fluid Mechanics (ISTM) of Karlsruhe Institute of Technology (KIT) are pleased to announce the next European Drag Reduction and Flow Control Meeting (EDRFCM) at the .drag reduction cannot be due to wall flexibility caused by the adsorbed polymer layer as suggested by Bryson, Arunachalan & Fulford ().

E. H. Dunlop (London) presented pipe-flow drag-reduction measurements for polystyrene in toluene. This polymer, a,lthough. Personal Aircraft Drag Reduction {Review} Personal Aircraft Drag Reduction.

by Bruce H. Carmichael (Published and sold by the author, Camino Capistrano, Capistrano Beach, CaliforniaUSA: ) pp, illus., 26 tables, opy, 1/c, Velobound.

US$25 postpaid in USA, $28 Canada, $33 Western Europe, $35 elsewhere.