Abstract
Abstract The numerical method of Cebeci, based on the solution of boundary-layer equations and the Mechul approach, has been developed further and applied to the problem of two-dimensional, laminar, coflowing, confined jets. For high ratios of the velocity of the jet to the surrounding stream, a region of recirculation forms on the confining wall and the method has been used to calculate the wall pressure and velocity distributions for ratios of 1, 3, 5, 8 and 10 and for values of the ratio of duct to jet width of 1, 2 and 8. The results indicate a smooth transition through separation and reattachement to fully-developed flow and, as a consequence, confirm that the method forms a basis for extension to turbulent coflowing confined jets, with small regions of separated flows, and to laminar and turbulent flows in similar configurations with imposed fluctuations. All calculations were performed with an Apple II microprocessor and demonstrate that practical boundary-layer calculations can be performed for low cost.
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