Development of a Method for Predicting Subsonic Turbulent Separating Boundary Layers.
Abstract
An attempt is made to develop a method for predicting subsonic flows exhibiting pressure gradient induced turbulent boundary layer separation. The concept of a strong interaction between rotational (viscous) layer near a body and an external irrotational flow is adopted. The boundary layer approximations to the equations of motion are retained in the viscous layer; mathematical coupling between the flow regions is introduced by requiring continuity of flow speed (or Mach number) and direction. An integral method is used to solve the boundary layer equations; the equations are set up so that either flow speed or angle can be calculated, given the other. A modification of the wall-wake velocity profile valid for compressible flow is used together with an algebraic non-equilibrium turbulence model. Equations solved are the integral continuity, momentum, and moment of momentum equations. Predictions for compressible and incompressible plane two-dimensional separating and reattaching boundary layers are quite good when edge speed or angle are available from experimental data.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1978
- Accession Number
- ADA051535
Entities
People
- Philip M. Gerhart
- Rodrick V. Chima
Organizations
- University of Akron