Disturbances in a Wall Boundary Layer Introduced by an Array of Low-Intensity Vortices.
Abstract
To acquire insights into the role of freestream turbulence on laminar-turbulent transition, the interaction between arrays of single-wavenumber vortices convected at the mean freestream velocity is studied analytically and numerically. The boundary value problem consists of a nonhomogeneous, partial differential equation with forcing function depending on the mean flow and the freestream disturbances. The Orr-Summerfeld linear operator appears with phase speed unity and real wavenumber. The mathematical system is solved numerically via expansion in Chebyshev polynomials. Disturbance velocities, vorticity, energy, pressure, and Reynolds stresses were obtained over a range of the wavenumber, Reynolds number, vortex position relative to the plate, and skewing angle. Results are discussed. (Modified author abstract)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1974
- Accession Number
- AD0785394
Entities
People
- Eli Reshotko
- Harold L. Rogler
Organizations
- Case Western Reserve University