Abstract
A family of integral methods for predicting the development of two-dimensional incompressible turbulent boundary layers in arbitrary pressure gradients is described. The momentum integral equation and a wall friction relation are used in each method. A third equation must be selected from A) the energy integral equation, B) the entrainment equation, or C) the moment of momentum integral equation. It is shown that an over-all comparison of all three methods with a wide range of experimental results is generally satisfactory. The use of B gives the best agreement for adverse pressure gradient cases whereas the use of A and C predicts equilibrium and relaxing flows better.
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