## A portfolio of stability characteristics of incompressible boundary layersNorth Atlantic Treaty Organization, Advisory Group for Aerospace Research and Development, 1969 - Science - 128 pages A collection of linear amplification and propagation rates (temporal and spatial) for two similar and non-similar families of boundary layers is presented in graphical and tabular form. The utilization of the Portfolio information for estimating transition Reynolds numbers is discussed. (Author). |

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### Contents

SELECTED ASPECTS OF STABILITY THEORY | 4 |

STABILITY CHARACTERISTICS OF THE PROFILES | 14 |

SAMPLE APPLICATION OF PORTFOLIO INFORMATION TO THE HISTORY | 20 |

2 other sections not shown

### Common terms and phrases

3.9270 PROFILE COEFFICIENTS 4.7124 PROFILE COEFFICIENTS ALFAR»DELTA BETAR»NU/U»»2 ALFAI»NU/U ALFAR»DELTA BETAR»NU/U»»2 BETAI»NU/U»»2 amplification rates J3 amplitude parameter BETAI»NU/U»»2 CIMAG GROUP BETAR»DELTA/U ALFAR»DELTA BETAR»NU/U»»2 BETAR»NU/U»»2 ALFAI»NU/U GROUP Boundary Layer Transition CITMP CN CN CN constant spatial amplification constant temporal amplification correlation critical Reynolds number curvature distributions Curves of constant dimensionless disturbance frequency disturbance velocity downstream e.g. References eigenvalues families of profiles Fluid Mechanics formulation free-stream disturbances FS family function Gaster transformation GRDUP group velocity HIGHER MODE SOLUTIONS inflected profiles inflection point instability Instantaneous velocity profiles Journal of Fluid Klebanoff Laminar Boundary Layer linear stability theory local-constant-base maximum mean flow mean profile minimum critical Reynolds non-linear non-similar profiles Obremski Orr-Sommerfeld equation oscillation Parallel Flows Poiseuille flow Portfolio pressure gradient ratio RE(DELTA Section shear layer spatial amplification rates stability characteristics Table temporal amplification rates TEMPORAL DATA three-dimensional turbulent spots two-dimensional unsteady values vorticity distribution wall wave number wave packet XW/U