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Mutual interference between jets and intakes in STOVL aircraft

1999; Cambridge University Press; Volume: 103; Issue: 1024 Linguagem: Inglês

10.1017/s0001924000064824

2059-6464

A. J. Saddington, K. Knowles,

Aerodynamics and Acoustics in Jet Flows

Abstract A series of experiments has been performed in an open-jet wind tunnel on a generic jet-lift STOVL aircraft in transition out of ground effect. In order to obtain information about the forces acting on the aircraft, static pressure measurements were made on the wing and intake lips. The model tested was equipped with a single vectored lift-jet and ‘powered’ intakes. Tests were conducted at a variety of nozzle pressure ratios and effective velocity ratios. The experiments conclude that a mutual interference exists between the jet and intake flows which generates non-linearly-additive loads on the airframe. This questions the validity of testing jets and intakes separately on a STOVL aircraft of this type.