Integral Calculations of Transitional Boundary Layers

Abstract

A method is presented for the calculation of two-dimensional, incompressible, transitional boundary layers under small pressure gradient and moderate freestream turbulence conditions. Established integral techniques are used in conjunction with an intermittency weighted model of the transitional boundary layer, and empirical correlations are used to predict the onset and length ofthe trunsition region. The only input data required to compute the entire unseparated boundary layer are the ambient pressure and temperature, fhe freestream turbulence level and the freestream velocity distribution in a power law, or a polynomial form. Alternatively, the freestream velocity can be input in tabular form as a function of x.