Oscillatory momentum transport in cascade transitional boundary layer flows

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The generation and early evolution of boundary layer transitional instabilities, named Tollmien- Schlichting (T-S) waves, in airfoil cascade flows are studied. The energy exchange between the mean flow and the flow instabilities is computed by performing Direct Numerical Simulation of the fluid flow governing equations and by calculating the fluctuating kinetic energy (FKE) budget within the separated boundary layer. The driving role of the FKE production in the wavelength modulation process associated to the receptivity phenomenon, i.e., the generation of T-S waves, is demonstrated. The FKE production largely hastens the wavelength modulation around the inflection point of the mean velocity profile across the boundary layer. Above the inflection point, the fluctuating pressure field favors the energy transport and provides the energy necessary to convect the instabilities out of the boundary layer. The evolution of the T-S waves depicts an asymmetric distribution of the production term in the transverse direction, i.e., in the lower half of the boundary layer the mean flow provides energy to the instabilities while the opposite occurs in the upper half.

Original languageEnglish
Title of host publication29th AIAA Fluid Dynamics Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
Pages1-8
Number of pages8
ISBN (Print)9780000000002
DOIs
Publication statusPublished - 1998
Externally publishedYes
Event29th AIAA Fluid Dynamics Conference - Albuquerque, United States
Duration: Jun 15 1998Jun 18 1998

Other

Other29th AIAA Fluid Dynamics Conference
CountryUnited States
CityAlbuquerque
Period6/15/986/18/98

Fingerprint

Boundary layer flow
Momentum
Boundary layers
Kinetic energy
Modulation
Wavelength
Cascades (fluid mechanics)
Direct numerical simulation
Airfoils
Flow of fluids

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Aerospace Engineering

Cite this

Rojas-Solòrzano, L. R. (1998). Oscillatory momentum transport in cascade transitional boundary layer flows. In 29th AIAA Fluid Dynamics Conference (pp. 1-8). American Institute of Aeronautics and Astronautics Inc.. https://doi.org/10.2514/6.1998-2560

Oscillatory momentum transport in cascade transitional boundary layer flows. / Rojas-Solòrzano, Luis R.

29th AIAA Fluid Dynamics Conference. American Institute of Aeronautics and Astronautics Inc., 1998. p. 1-8.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Rojas-Solòrzano, LR 1998, Oscillatory momentum transport in cascade transitional boundary layer flows. in 29th AIAA Fluid Dynamics Conference. American Institute of Aeronautics and Astronautics Inc., pp. 1-8, 29th AIAA Fluid Dynamics Conference, Albuquerque, United States, 6/15/98. https://doi.org/10.2514/6.1998-2560
Rojas-Solòrzano LR. Oscillatory momentum transport in cascade transitional boundary layer flows. In 29th AIAA Fluid Dynamics Conference. American Institute of Aeronautics and Astronautics Inc. 1998. p. 1-8 https://doi.org/10.2514/6.1998-2560
Rojas-Solòrzano, Luis R. / Oscillatory momentum transport in cascade transitional boundary layer flows. 29th AIAA Fluid Dynamics Conference. American Institute of Aeronautics and Astronautics Inc., 1998. pp. 1-8
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