Laminar-Turbulent Transition: Iutam Symposium, Sedona/AZ September 13 - 17, 1999

ISBN-13: 9783642087523 / Angielski / Miękka / 2010 / 686 str.

H. F. Fasel; W. S. Saric

Opis

The origins of turbulent flow and the transition from laminar to turbulent flow are among the most important unsolved problems of fluid mechanics and aerodynamics. Besides being a fundamental question of fluid mechanics, there are many practical applications for information regarding transition location and the details of the subsequent turbulent flow. This proceedings volume contains the papers of two keynote lectures as well as of 104 technical presentations and posters that were presented at the IUTAM Symposium on Laminar-Turbulent Transition in Sedona, Arizona, September 13-17, 1999.
The papers published in the present volume document the state of the art in transition research, and therefore, increased emphasis on the various topics covered in this meeting can be expected in the future.

Spis treści

Keynote Lectures.- Turbulence in the Turn of the Century.- Early History of Compressible Linear Stability Theory.- Session A: Receptivity I.- Effect of Leading-Edge Geometry and Aerodynamic Loading on Receptivity to Acoustic Disturbances.- Acoustic Receptivity in Boundary Layers with Surface Roughness.- A Causal Stability Analysis of the Boundary Layer Over a Compliant Wall.- Non-Parallel Receptivity and the Adjoint PSE.- Session B: Receptivity II.- Three-Dimensional Receptivity of Boundary Layers to External Perturbations.- Boundary Layer Receptivity to Free-Stream Sound on Elliptic Leading Edges of Flat Plates.- Non-Localized Acoustic Receptivity and Subsequent Disturbance Growth in a Blasius Boundary Layer.- Receptivity and Bypass Dynamics.- Study of 3D Wall Roughness Acoustic Receptivity on an Airfoil.- Experiments on Receptivity, Stability, and Transition of 2-D Laminar Boundary Layers with Streamwise Pressure Gradients.- Leading-Edge Acoustic Receptivity Measurements Using a Pulsed-Sound Technique.- Poster Session I.- Evaluation of Adjoint Based Methods for the Prediction of Receptivity.- Receptivity to Freestream Turbulence and the Effect of Longitudinal Vortices in Boundary Layer Transition.- Receptivity for a Flat Plate with a Rounded Leading-Edge.- Experiments on the Receptivity of a Boundary Layer to a Localized Free Stream Disturbance.- Experimental Study of Flat-Plate Boundary Layer Receptivity to Vorticity Normal to Leading Edge.- Boundary Layer Longitudinal Localized Structures Control by Means of Spanwise Wall Oscillations.- DNS of Active Control of Disturbances in a Blasius Boundary Layer.- Active Control of TS-Instabilities on an Unswept Wing.- Control of Streaky Structures by Localized Blowing and Suction.- Late-Stage Transitional Boundary-Layer Structures. Direct Numerical Simulation and Experiment.- Experimental Study of a ?-Structure Development and Mechanism: Its Transformation into the Turbulent Spot.- Nonlinear Evolution of Tollmien-Schlichting Waves at Finite Reynolds Numbers.- On Why Oblique Waves in the Blasius Boundary Layer Show Stronger Nonparallel Effects than Planar Waves.- Stability of Weakly Non-Similar Swept-Wing Boundary Layers.- Boundary Layer Transition Due to the Entry of a Small Particle.- Turbulent Energy Production Mechanism in General Boundary Layer Transition.- Energy Transfer Analysis of Turbulent Plane Couette Flow.- Nonlinear Initial Value Problems for Wave/Vortex Interactions in Channel Flows.- Numerical Investigation of Resonance Phenomena in Wall Jet Transition.- Supersonic Boundary Layer Receptivity to Streamwise Acoustic Field.- Feed-Forward Control of Streak Instabilities in Plane Poiseuille Flow by Localized Suction.- Effect of Suction Through Arrays of Holes on a 3-D Boundary Layer Investigated by Spatial Direct Numerical Simulation.- Session C: Attachment Line and General Topics.- Relaminarization and Retransition of Accelerated Turbulent Boundary Layers on a Convex Surface.- Effect of Wall Temperature on Roughness Induced Attachment-Line Transition.- On the Growth of Waves in Boundary Layers: A Simple Approximate Solution.- Session D: 3-D Transition in 2-D Flows.- The Formation of Secondary Structures and Random Perturbations in the Development of Periodic Lambda-Structures in a Laminar Boundary Layer.- Instability and Breakdown of the Three-Dimensional High-Shear Layer Associated with a Near-Wall Low-Speed Streak.- On Vortex Interaction in the Latter Stages of Boundary-Layer Transition.- The Evolution of Hairpin Vortices in Shear Flows.- Nonlinear Three Dimensional Wavetrains of Small Amplitude in Boundary Layers: Experiments, Theory and Computations.- Stationary and Nonstationary Streaky Structures and Secondary Instability of Boundary Layers.- Session E: Control.- Generation of Oblique Waves in a Blasius Boundary Layer by Thin Piezo-Film Actuators Attached to the Wall Surface.- Optimal Control by Blowing and Suction at the Wall of Algebraically Growing Boundary Layer Disturbances.- A Novel Velocity-Vorticity Method for Simulating Boundary-Layer Disturbance Evolution and Control.- Optimal Three-Dimensional Perturbations in the Blasius Boundary Layer.- Optimal Control of Boundary Layers Under Body Forces.- Session F: General Topics.- Reynolds Stress Development in the Viscous Layer of a Transitional Boundary Layer.- Distortion of Tollmien-Schlichting Waves by Leading-Edge Vortices.- Convective and Absolute Instability in the Mixed Convection Boundary Layer Over a Vertical Flat Plate.- Stability of Poiseuille Flow in a Corrugated Channel.- The Transition Zone on a Heated Axisymmetric Body.- Session F: General Topics Continued.- The Occurrence of Natural Transition Phenomena in Periodic Transition on Axial Compressor Blades.- Comparisons Between Triggered Turbulent Spots and Unsteady Transition Phenomena on Compressor and Turbine Blading.- Growth and Breakdown of Streaky Structures in Boundary Layer Transition Induced by Free Stream Turbulence.- Onset of Turbulence in Circular Pipe Flows.- A Hybrid Spectral/Finite-Difference Scheme for the Simulation of Pipe-Flow Transition.- Session G: Supersonic.- Transition of Supersonic Boundary Layers (Experiment and Theory Review).- Investigation of Transition to Turbulence in a 3D Supersonic Boundary Layer.- The Blunt Body Paradox—A Case for Transient Growth.- Hypersonic Boundary-Layer Receptivity and Stability.- Spatial Direct Numerical Simulation of Transition Phenomena in Supersonic Flat-Plate Boundary Layers.- Experimental Investigations of the Hypersonic Boundary Layer Stability.- Development of a Mach-6 Quiet-Flow Ludwieg Tube for Transition Research.- A Numerical Study for Small Amplitude T-S waves in a Supersonic Boundary Layer.- Nonlinear Instability of Hypersonic Flow Over a Cone.- Poster Session II.- DNS of Boundary-Layer Receptivity to Freestream Sound for Hypersonic Flows Over Blunt Elliptical Cones.- Experimental Study of Supersonic Boundary Layer Receptivity in Controlled Conditions.- Development of Artificial Disturbances in the Boundary Layer on a Plate and in the Wake Behind It at Supersonic Free-Flow Speed.- On Anomalous Wave Processes in Supersonic Boundary Layer.- On the Inviscid Spatial Instability of Supersonic Boundary-Layer Flow Along Bodies of Revolution.- Experimental Investigations of Disturbance Development in the Hypersonic Boundary Layer on a Conical Model.- On the Receptivity Process of Supersonic Laminar Boundary Layer.- Low-Order Stability Theory for Non-Parallel Compressible Boundary Layer Flow.- On Correspondence of Laminar-Turbulent Transition Processes in Natural and Controlled Supersonic Experiments on Flat Plate.- Later Stages of Transition of an Airfoil Boundary Layer Flow Excited by a Harmonic Point Source.- Experiments on the Transition to Turbulence of the Flow Between a Stationary and a Rotating Disk.- Maximum Growth of Görtler Vortices.- Non Normality of the Görtler Operator and Spatial Amplification.- Linear Stability of the Supersonic Turbulent Boundary Layer to Görtler Vortices on a Concave Wall.- Direct Numerical Simulation of Görtler Instability in Hypersonic Boundary Layers.- Effect of the Pressure Gradients on the Secondary Instability of Görtler Flow.- Laminar-Turbulent Transition of a Separation Flow on a Forward Facing Step.- Flow Instability in Laminar Separation Bubbles.- Experimental Study of the Stability of the Bödewadt Layer.- Late Stage of Transition in a Circular Pipe Flow.- DNS-Investigations of the Development and Control of Crossflow Vortices in a 3-D Boundary-Layer Flow.- 3-D Stability and Receptivity of 2-D Self-Similar Boundary Layer with Adverse Pressure Gradient.- Relation of Glaze Ice Formations on Swept Wings to Crossflow Instability.- Secondary Stability Analysis of Nonlinear Crossflow Vortices.- Session H: Crossflow.- Influence of Surface Roughness and Suction on the Receptivity of a Swept Wing Boundary Layer.- Stability and Transition in 3-D Boundary Layers.- Absolute/Convective Instability Analysis of Secondary Cross-Flow Vortices in a Three-Dimensional Boundary Layer.- Stabilization of Boundary-Layer Flows Subject to Crossflow Instability with the Aid of Suction.- Numerical Study of Excitation of Two Different Instabilities in Three-Dimensional Boundary Layer on a Yawed Cylinder.- Three-Dimensional Boundary-Layer Transition Phenomena Investigated by Spatial Direct Numerical Simulation.- On the Connection Between Cross-Flow Vortices and Attachment-Line Instabilities.- A Theoretical Investigation of the Development of the Stationary Crossflow Vortices in the Boundary Layer on a Swept Wing.- Experimental Study of Traveling Waves in 3-D Boundary Layer on a Swept Wing.- Characteristic Features of Traveling Disturbances Originating from a Point Source on a Rotating-Disk Flow.- Multimode Instability of the Three-Dimensional Boundary Layer Along an Infinite Attachment Line.- Session I: Wall Jets and Separation.- Numerical Investigation of Heat Transfer Mechanisms in Wall Jet Transition.- Secondary Disturbance Amplification and Transition in Laminar Separation Bubbles.- Global Linear Instabilities in Laminar Separated Boundary Layer Flow.- Transition in Separated Flows Via Global Instability.- Effect of Harmonic Excitation on Instability of Laminar Separation Bubble on an Airfoil.- Linear and Nonlinear Nonlocal Instability Analyses for Two-Dimensional Laminar Separation Bubbles.