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Sunday, May 3, 2020 | History

3 edition of Supersonic laminar flow control research found in the catalog.

Supersonic laminar flow control research

Supersonic laminar flow control research

NASA grant no. NAG 2-881, final report, January 1994 - June 1996

by

  • 195 Want to read
  • 23 Currently reading

Published by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, DC, Springfield, Va .
Written in English

    Subjects:
  • Laminar flow.,
  • Supersonic flow.,
  • Active control.,
  • Stability.,
  • Boundary layer control.,
  • Boundary layer flow.,
  • Boundary layer stability.,
  • Prediction analysis techniques.,
  • Supersonic boundary layers.

  • Edition Notes

    Statementprincipal investigator, Ching F. Lo; other investigators [i.e. investigator], Clark G. Wiberg.
    SeriesNASA contractor report -- NASA CR-203485.
    ContributionsWiberg, Clark G., United States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15543412M

      Aircraft laminar flow control (LFC) from the 's through the 's is reviewed and the current status of the technology is assessed. Examples are provided to demonstrate the benefits of LFC for subsonic and supersonic aircraft. A history of suction-type laminar-flow control with empahsis [i.e. emphasis] on flight research (Monographs in aerospace history:) Broché Laminar-Turbulent Transition: Iutam Symposium Toulouse/France September 11 - 15 Read "Innovation in Flight: Research of the NASA Langley Research Center on Revolutionary Advanced Concepts for Aeronautics - SST, Supersonic Civil Aircraft, Blended Wing Body, Laminar Flow, Vortex Flap" by Progressive Management available from Rakuten Kobo. Professionally converted for accurate floPrice: $ Find many great new & used options and get the best deals for A History of Suction-Type Laminar-Flow Control with Emphasis on Flight Research Monograph in Aerospace History, No 13 by Albert L. Braslow and NASA History Division (, Paperback) at .

    SLFC stands for Supersonic Laminar Flow Control (research project; US NASA) Suggest new definition This definition appears somewhat frequently and is .


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Supersonic laminar flow control research Download PDF EPUB FB2

The objective of this research is to understand supersonic laminar flow stability, transition and active control. Some prediction techniques will be developed or modified to analyze laminar flow stability. The effects of distributed heating and cooling as an active boundary layer control technique.

The objective of the research is to understand supersonic laminar flow stability, transition, and active control. Some prediction techniques will be developed or modified to analyze laminar flow stability.

The effects of supersonic laminar flow with distributed heating and cooling on active control will be : Ching F. Supersonic Laminar Flow Control. Abstract. For several decades (’s to ’s) the development trend of commercial aviation was higher and faster culminating in the class of conventional takeoff and landing (CTOL) transport (and subsequent derivatives).Cited by:   Supersonic laminar flow control Supersonic laminar flow control research book been identified as a program element, since it offers significant drag-reduction benefits Supersonic laminar flow control research book is one of the more promising technologies for producing an economically viable aircraft design.

NASA is using two prototype FXL aircraft to research supersonic laminar flow by: 8. erator Flow Control for Supersonic Engine Inlets. A fully laminar base flow is considered so as to isolate the effect of incoming turbulence as well.

Therefore, in the Supersonic laminar flow control research book project SUPERTRAC (SUPERsonic TRAnsition Control) experimental and numerical studies on laminar flow control by suction for an. SUPERSONIC LAMINAR FLOW CONTROL RESEARCH SEMI-ANNUAL REPORT #4 July - December Dr.

C.F. Lo, Principal Investigator University of Tennessee Space Institute NASA Ames Research Center NAG Ames Research Center Moffett Field, CA INSTITUTION: The University of Tennessee Space Institute Tullahoma,TN Phone SUPERSONIC LAMINAR FLOW CONTROL RESEARCH SEMI-ANNUAL REPORT #4 July - December Dr.

C.F. Lo, Principal Investigator University of Tennessee Space Institute i/) o CO f\j u NASA Ames Research Center NAG C rH D O (M O X. ro O a Ames Research Center Moffett Field, CA INSTITUTION: The University of Tennessee Space Institute.

The history of Laminar Flow Control (LFC) from the s through the s is reviewed and the current status of the technology is assessed. Early stud- ies related to the natural laminar boundary-layer flow physics, manufacturing tolerances for laminar flow, and.

SNLF stands for Supersonic Natural Laminar Flow. Laminar flow over the wing reduces the friction drag. Achieving this has been the aim of a number of designs, from the laminar flow airfoils of the past to the latest MAX winglet. Get this from a library. Supersonic laminar flow control research: semiannual report #2.

[C F Lo; Ames Research Center.]. Get this from a library. Supersonic laminar flow control research: NASA grant no. NAGfinal report, January - June [Ching F Lo; Clark G Wiberg; United States. National Aeronautics and Space Administration.]. About this book. Research on laminar flow and its transition to turbulent flow has been an important part of fluid dynamics research during the last sixty years.

Since transition impacts, in some way, every aspect of aircraft performance, this emphasis is not only. Get this from a library. Supersonic laminar flow control research: final report, July June [Ching F Lo; Ames Research Center.]. An idealized pressure distribution and its validity to achieve approximately 35% laminar flow region of the wing surface on a cranked arrow type planform are presented at the condition of Mach and high Reynolds number of approximately million based on mean aerodynamic by: The Aerion natural laminar flow supersonic business jet concept requires just that.

This paper discusses some details of the unique technology developed for the design of Aerion's revolutionary : Peter Sturdza. Abstract. Research in the area of laminar flow control (LFC) dates back to the ’s when early applications of stability theory led to the observation that laminar boundary layers can be stabilized by either favorable pressure gradients or small amounts of wall by: 2.

Two FXL aircraft were used by the Dryden Flight Research Center, Edwards, CA, in a NASA-wide program to improve laminar airflow on aircraft flying at sustained supersonic speeds. It was the first program to look at laminar flow on swept wings at speeds representative of those at which a high speed civil transport might fly.

NASA became aware in of a renewed U. Air Force (USAF) interest in active laminar-flow control through a visit of Philip P. Antonatos of the USAF Wright Air Development Division (WADD) to the author, who was then head of the General Aerodynamics Branch of the LaRC Full-Scale Research Size: 2MB.

Supersonic Laminar Flow Control One goal of NASA's High-Speed Research (HSR) program is to achieve laminar, or smooth, airflow over the surface of an. The goal of the LFC research program was to achieve laminar flow at supersonic speeds over 50 to 60 percent of the chord (from leading edge to the trailing edge) on the swept wing.

The program ended with laminar flow demonstrated at a speed of Mach 2 over 46 percent of the wing's chord. The flow control of a supersonic mixing layer was studied in a supersonic mixing layer wind tunnel with convective Mach number (Mc) at The passive control of the mixing layer was achieved by.

Several examples are presented and discussed. Results concerning riblets and laminar flow control are given in Section 4 part which also will present experiments carried out for attachment line contamination investigation.

Results from basic research on supersonic laminar flows are also be by: 9. Recently, this flow laminarization strategy was further developed as applied to supersonic boundary layers on wings, thus potentially offering a passive control means for the laminar-turbulent.

For transport aircraft, the reductions in fuel consumed as a result of laminar-flow control may equal 30 percent of present consumption. Laminar-flow control is an area of aeronautical research that has a long history at NASA's Langley Research Center, Dryden Flight Research Center, their predecessor organizations, and : Progressive Management.

Get this from a library. Supersonic laminar flow control research: semi-annual report #1, January - June [C F Lo; Ames Research Center.]. This case was the maximum run of laminar flow with the deg shock fence installed.

The “X” symbols (fig. 15) represent pressure results for a test point without the shock fence installed, which occurred at an altitude of 50, ft, ° angle of attack, and ° angle of Size: 1MB. extent of laminar flow and the achievable maximum lift coefficient.

The two-element, slotted, natural-laminar-flow (SNLF) airfoil concept is a passive, NLF concept aimed at achieving a high maximum lift coefficient and extensive laminar flow in cruise [1]. The aft File Size: 1MB. The delay of transition through the use of a favorable pressure gradient by proper body shaping (natural laminar flow) or the use of a small amount of suction (laminar flow control) was recognized even in the early s and rapidly became the foundation of much of the laminar flow research.

Laminar flow occurs when when air flows smoothly over a surface. Think of a water flowing smoothly around a large, smooth round rock. The water flows easily, and the water appears glassy.

But if the rock is jagged or the water is flowing fast enough, turbulent eddies form. Aerodynamics, from Greek ἀήρ aero (air) + δυναμική (dynamics), is the study of motion of air, particularly as interaction with a solid object, such as an airplane wing.

It is a sub-field of fluid dynamics and gas dynamics, and many aspects of aerodynamics theory are common to these term aerodynamics is often used synonymously with gas dynamics, the difference being that. 1×1 Supersonic Wind Tunnel.

The 1- by 1-Foot Supersonic Wind Tunnel (1×1) specializes in conducting fundamental research in supersonic and hypersonic fluid mechanics, supersonic-vehicle-focused research and detailed benchmark quality experiments for computational fluid dynamics (CFD) code validation.

The objective of the book is to present a comprehensive view of the subject of natural laminar flow and laminar flow control research ranging across the spectrum from mathematical theories and computational tools to wind tunnel experiments and flight tests. Each article is both a review and an archival reference.

Researchers demonstrated that supersonic airfoils can be constructed to induce passive laminar flow control (LFC). This reduces or eliminates the. Natural Laminar Flow Ł Reno Air, DTI, Desk-Top Aero Concept Œ Richard Tracy, Ilan Kroo, et al. (AIAA Reno ) Œ Very low sweep angle, long run of accelerated flow Ł NAL, Japan Concept (AIAA St Louis ) Œ Very rapid crossflow acceleration, then flat Cp Ł Don™t be marginal with T-S Œ Wind tunnel tests are difficult Œ High Re is.

Supersonic Laminar Flow Control (LFC) airplanes with externally braced highly swept LFC wings of high structural aspect ratio (with the sweep increasing towards the wing root) offer particularly high supersonic cruise (L/D)'s with low sonic boom the design cruise condition the flow in the direction normal to the upper surface isobars is transonic (with embedded supersonic Cited by: American Institute of Aeronautics and Astronautics Sunrise Valley Drive, Suite Reston, VA   Fischer, M.

C., Vemuru, C. Application of laminarflow control to the high speed civil transport—the NASA supersonic laminar flow control program. SAE paper 91–, Cited by: Currently, supersonic laminar flow control is being evaluated on the NASA F XL aircraft.

Finding U.S. supersonic wind tunnels adequately satisfy most current and potential test requirements. Shortfalls exist in productivity, reliability, maintainability, and laminar flow test capabilities.

An airfoil (American English) or aerofoil (British English) is the cross-sectional shape of a wing, blade (of a propeller, rotor, or turbine), or sail (as seen in cross-section).

An airfoil-shaped body moving through a fluid produces an aerodynamic component of this force perpendicular to the direction of motion is called component parallel to the direction of motion is. supersonic laminar flow control. SOREV. Surface Operations Research and Evaluation Vehicle.

SST. Washington, DC: The National Academies Press. doi: / U.S. Supersonic Commercial Aircraft: Assessing NASA's High Speed Research Program Get This Book. The results of a design study of a Hybrid Laminar Flow Control (HLFC) wing at transonic speed and correlative studies for finite, swept supersonic wings are discussed in this paper.

Transonic HLFC wing was designed such as to obtain laminar flow on the wing upper surface for X/C of Cited by: 1.Read chapter 3. New Opportunities for Research on Critical Supersonic Technologies: High-speed flight is a major technological challenge for both commerci.