A study of wall jets and tangentially blown wings

Transonic wall jets and tangentially blown wings were studied using symptotic and computational methods. Both submerged and coflowing cases of wall jets were investigated. The nature of the decay process for disturbances emanating from the jet exit was examined for the submerged configurations. In the coflowing case, selection rules defining various jet flow regimes in terms of the jet transonic similarity parameter and pressure level are given. Conditions are prescribed which define the penetration length for supersonic disturbances downstream from the exit as well as the location of the throats in the jet. The criticality of the flow far downstream is quantified in terms of these parameters. Models of the complete problem for a tangentially blown airfoil in incompressible and transonic are described. A systematic theory based on matched asymptotic expansions for the fine structure of the jets away from their exits is developed. The effects of initial skewness and vorticity are assessed. The trailing edge region of the blown airfoil was also studied. A finite difference model which characterizes the development of blown laminar boundary layers and wakes in the transonic regime is presented.