Wind-tunnel measurements on the interference between a jet and a wing, located outside the jet. Part I: text, tables and figures

Report (1977)

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Copyright: Campus only
Entrainment Jet flow Pressure distribution Nozzle flow Wind tunnel tests Wings Flaps (control surfaces) Interference lift Jet boundaries Down wash Nacelles Semi span model
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Published Date

12-07-1977

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NLR-TR 77009 U

Abstract

This report describes a wind-tunnel investigation on the interference between a jet and a wing half model, located outside the jet. Pressure distributions on the wing, and lift coefficients calculated from those have been used for evaluation of a method developed at NLR for the prediction of interference effects between jets and parts of airframes. A reduction of lift is found due to the jet below the wing, whereas the jet above the wing induces more lift, sometimes even leading to early separation and stall. Also for comparison with calculated cross sectional jet areas, contours of the jet were estimated at 2 stations behind the nozzle exit.