2 edition of Special Course on Stability and Transition of Laminar Flow. found in the catalog.
Special Course on Stability and Transition of Laminar Flow.
North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development.
|Series||Nato Agard-R -- 709|
Linear stability analysis for the HIFiRE-5 laminar mean flow is performed using the LASTRAC code and an in-house developed code for multi-dimensional stability analysis,. The effects of both compressibility and wall-curvature are accounted for in the stability analysis, except for the case of quasi-parallel LST where wall-curvature is by: 8. The largest uncertainty [in a hypersonic plane design] is the location of the point of transition from laminar to turbulent flow. Estimates range from 20% to 80% along the body span. That degree of uncertainty significantly affects the flow conditions at the engine inlet, aerodynamic heat transfer to the structure and skin by:
A numerical study of transverse curvature effects on compressible flow temporal stability for transonic to low supersonic Mach numbers is presented for axisymmetric modes. The mean flows studied include a similar boundary‐layer profile and a nonsimilar axisymmetric boundary‐layer by: 2. Get this from a library! Laminar Flow Control - Viscous Simulation.. [E Reshotko; CASE WESTERN RESERVE UNIV CLEVELAND OH Dept. of MECHANICAL AND AEROSPACE ENGINEERING.;] -- Laminar flow control offers the possibility of major reductions in aircraft drag. This lecture provides the theoretical background for the possible stabilizations of the laminar boundary layer due to.
Receptivity in this study is defined as originally coined by Morkovin (Tech. Rep. AFFDL TR, , pp. ; see also Reshotko, AGARD Special Course on Stability and Transition of Laminar Flow, N ) as the internalisation of an external disturbance into the initial condition that either initiates or sustains a vortical fluid. That the idea works is evidenced by the fact that the X aircraft achieved laminar flow at transition Reynolds numbers of 27×10 6 with a 20 per cent decrease in overall drag. There is no dearth of data regarding the success of suction in the laboratory and in flight. Special course on stability and transition of laminar flows AGARD Cited by:
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Publication date Title Variation Stability and transition of laminar flow Series AGARD report ; no. Note "AGARD-R" Material prepared under the combined sponsorship of the Fluid Dynamics Panel, the von Kármán Institute and the Consultant and Exchange Program of AGARD and was presented as an AGARD Special Course at the von Kármán Institute, Rhode-Saint-Genèse, Belgium.
Special Course on Stability and Transition of Laminar Flow The aim of this course was to present the knowledge of laminar-turbulent transition.
Incompressible two-dimensional and compressible flows in transonic, supersonic, and hypersonic regimes were covered, as well as available results for three-dimensional flows.
Boundary Layer Transition; Conferences; Flow Stability; Laminar Flow; Shear Flow; Three Dimensional Flow; Aerodynamics; Aerospace Technology Transfer; Flow Geometry; Fluid Dynamics; Viscous Flow; Fluid Mechanics and Heat Transfer.
because stability and transition results very sensitive to small departures of mean flow from its “exact” shape. • Stability of flow can depend on small variations of boundary conditions for the basic state, such as freestream velocity or wall temperature. Basic-state boundary conditions must also be very accurate.
Thus, the reader is provided with a step-by-step approach that covers the milestones and recent advances in the laminar-turbulent transition. Special aspects of instability and transition are discussed through the book and are intended for research scientists, while the main target of the book is the student in the fundamentals of fluid : Springer Netherlands.
Amal () Description and prediction of transition in two-dimensional, incompressible flow. In Special Course on Stability and Transition of Laminar Flow, Cited by: 1. “Stability of parallel flows” R. Betchov, W.O.
Criminale, Academic Press, “Special Course on Stability and Transition of Laminar Flow” AGARD Report“Progress in transition modelling” AGARD Report“A portfolio of stability characteristics of incompressible boundary layers” AGARDograph (AGARD Special Course on Stability and Transition of Laminar Flow).
Mikhail, A. & Ghia, K. Viscous compressible flow in the boundary region of an axial corner. AIAA J. 16. Special Issue \Complex Systems, Non-Equilibrium Dynamics and Self-Organisation." Guest Editor: Dr. Gunnar Prussner July 3, Abstract Wall-bounded ows experience a transition to turbulence characterized by the coexistence of laminar and turbulent domains in some range of Reynolds number R, the natural control parameter.
Modal Stability Theory: Boundary Layer Stability Theory: Special Course on Stability and Transition of Laminar Flow,” AGARD Report Herbert, Th., Stability of the Laminar Flow in a Rectangular Duct,” J.
Fluid Mech.,pp. Cited by: In this paper an analysis of laminar flow stability is presented which leads naturally to the parameter in a much different manner than originally proposed.
The stability parameter is seen to represent the coupling ratio between the rate of change of angular momentum of a deforming fluid element and its rate of loss of momentum by frictional by: Schli~hting*s(~) book on boundary-layer theory contains two chapters on stability and transition, and Monin and Yaglom's (26) book on turbul mce contains a sing1 ci lengthy chapter on the same subject, as does the book by White (27) on viscous flcw theory.
Reviews of transition have been given by ilryden, (28) Tani. (29) Morkovin") and Reshotko. Arnal D. () Control of Laminar-Turbulent Transition for Skin Friction Drag Reduction.
In: Meier G.E.A., Schnerr G.H. (eds) Control of Flow Instabilities and Unsteady Flows. International Centre for Mechanical Sciences (Courses and Lectures), vol Cited by: 9. The problem of the transition of the laminar type of flow into the turbulent type is rather an old one.
Much better success is achieved by the assumption that small disturbances are superposed upon the basic laminar flow. The article closes with a summary on stability theory, calling special attention to suction boundary layers.
Only to the end of the XX century, the guesses about the mechanism of transition of laminar flow in the straight pipe to the turbulent as about phenomenon of a static buckling of the flexible solid body are arised.
It was offered to compare the flow stability in the plastic curved pipe with the buckling of cylindrical or spherical shells . Stages of Laminar-Turbulent Transition in a Boundary-Layer 1.
Stable, laminar flow following the leading edge, 2. Unstable, laminar flow with 2-D Tollmien-Schlichting waves, 3. Development of unstable, laminar, 3-D waves and vortex formation, 4.
Burst of File Size: KB. A Faster “Transition” to Laminar Flow A discussion is given of the ongoing research related to laminar flow airfoils, nacelles, and wings where the laminar flow is maintained by a favorable pressure gradient, surface suction or a combination of the by: 8.
While the transition from laminar to turbulent flow occurs at a Reynolds number of approximately in a pipe, the precise value depends on whether any small disturbances are present.
If the experiment is very carefully arranged so that the pipe is very smooth and there are no disturbances to the velocity and so on, higher values of Re can be.
Langley Stability and TransitionAnalysis Code (LASTRAC)is a general-purposed, physics-based transition prediction code released by NASA for Laminar Flow Control studies and transition research. While signif-icant progress has been made in the past decades concerning instability wave evolution and transition flow.
In Special Course on Stability and Transition of Laminar Flow, AGARD Martin, N., Grossir, G., Miró Miró, F., Le Quang, D. & Chazot, O. Implementation of a laser-based schlieren system for boundary layer instability investigation in the VKI H3 hypersonic wind : Fernando Miró Miró, Fabio Pinna.
LAMINAR STABILITY ANALYSIS IN BOUNDARY LAYER FLOW the flow can be changed to delay transition process. Mathematical Model Let be uv,p a solution of the incompressible.1.
L. M. Mack, “ Boundary-layer stability theory,” in Special Course on Stability and Transition of Laminar Flow, edited by R. Michel (Advisory Group for Aerospace Research and Development, Neuilly, ).
Google Scholar; 2. A. Demetriades, “ New experiments on hypersonic boundary layer stability including wall temperature effects,” Proc. Heat Transfer Fluid Mechanics Instit 39 Cited by: 6.
AGARD reports: AGARDographA Portfolio of Stability Characteristics of In- compressible Boundary Layers, by Obremski, Morkovin, and Landahl, ; CP, Application of Direct and Large Eddy Simulation to Transition and Turbulence, ; ReportSpecial Course on Stability and Transition of Laminar Flow, ; ReportSpecial Course on Progress in Transition File Size: 23KB.