Abstract
This paper describes a method for predicting the response of the two-dimensional, incompressible, laminar boundary layer on a semi-infinite flat plate under small harmonic progressive oscillations of the free-stream velocity for arbitrary frequency and wave speed. The free stream considered consists of a constant mean of which an oscillating amplitude varying with downstream distance is superimposed. The governing equations are solved numerically by a differential-difference technique in conjunction with a series solution for small reduced frequencies. The results are compared with those obtained by other methods and measurements. The results are accurate for a full range of frequency, and the response is very sensitive to changes in the wave convection speed.
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