Nozzle Development for the Upper Surface - Blown Jet Flap on the YC-14 Airplane

Howard Skavdahl; Timothy Wang; William J. Hirt

doi:10.4271/740469

1974-02-01

Nozzle Development for the Upper Surface - Blown Jet Flap on the YC-14 Airplane 740469

A discussion of wing-nozzle configuration development for the application of upper surface blowing to a STOL airplane is presented. The technical challenge is to achieve an integrated system which provides the desired performance for the low speed design conditions and also results in efficient operation during cruise. The resulting configuration is a complete integration of the propulsion system and airplane aerodynamics to achieve efficient operation at all regimes. This paper examines the major design parameters to be considered, describes a number of the configurations tested, and presents static and wind tunnel test results for these configurations. Concluding remarks are made relative to USB nozzle development.

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Nozzle Development for the Upper Surface - Blown Jet Flap on the YC-14 Airplane 740469

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