Abstract
Previous investigations on OWB aerodynamics2'3 have been centered on the jet entrainment effect, without properly accounting for the dynamic pressure difference in the flowfield because of the presence of the jet. The predicted lift has been found to be too low as compared with experiments, in particular, when the jet is close to the wing. In this paper, the additional lift induced by the over-wing-blowing jets is attributed to the inviscid jet-wing interaction due to the higher jet dynamic pressure and the jet flap effect. The methods used in computing the jet entrainment effect and the wing-jet interaction are summarized in the following. Existing methods for computing jet entrainment are mainly for incompressible, nonheated jets.4 To extend the methods to compressible heated jets, Kleinstein's theory for free compressible jets is revised to include the effect of external stream, with the simplicity of his theory being retained. In this extended theory, the axial velocity is given by
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