METHOD FOR CALCULATING UNSTEADY TURBULENT BOUNDARY LAYERS IN TWO- AND THREE-DIMENSIONAL FLOWS

The governing equations for an unsteady turbulent boundary layer on a swept infinite cylinder, composed of a continuity equation, a pair of momentum equations and a pair of rate equations for the shear stress, based on the turbulent kinetic-energy equation are solved numerically. These rate equations for the shear stress express a balance between the convection, production, dissipation and diffusion of the turbulent shear stress components. An explicit, second-order accurate, conditionally stable difference scheme for this system, together with appropriate boundary and initial conditions, is formulated and developed into a computer program. Calculations for oscillating freestream flows with no pressure gradient show significant unsteady effects on the turbuient boundary layer. Expected phase shifts in wall shear stress and displacement thickness were found.

• Corporate Authors:

  American Institute of Aeronautics and Astronautics

  1290 Avenue of the Americas
  New York, NY  United States  10019
• Authors:
  • Singleton, R E
  • Nash, J F
• Publication Date: 1974-5

Media Info

• Features: References;
• Pagination: p. 590-595
• Serial:
  • AIAA Journal
  • Volume: 12
  • Issue Number: 5
  • Publisher: American Institute of Aeronautics and Astronautics
  • EISSN: 1533-385X
  • Serial URL: https://arc.aiaa.org/journal/aiaaj

Subject/Index Terms

• TRT Terms: Boundary layer; Shear stress; Three dimensional flow; Turbulence; Turbulent boundary layer; Two dimensional flow; Unsteady flow; Walls
• Old TRIS Terms: Wall shear stress
• Subject Areas: Design; Marine Transportation;

Filing Info

• Accession Number: 00057635
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Oct 5 1974 12:00AM