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Thermophysics and Aeromechanics

2007 year, number 2

Reduction of vertical-gust induced loads on elastic airplane model with slotted-interceptor-type surfaces

A.Yu. Mazutsky
Chaplygin Siberian Research Institute of Aviation (SibRIA), Novosibirsk, Russia
Pages: 187–192


Results of T-203 wind-tunnel tests of an elastic airplane model dynamically similar to Tu-204 aircraft equipped with a passive wing load reduction system are reported. The wing load reduction system comprised two auxiliary aerodynamic surfaces of the slotted-interceptor type installed symmetrically on the upper surface of the lifting wing at the boundary-layer height. It was found that, with the operating system, the additional bending moments induced by symmetric vertical discrete gusts in the wing root and at the fuselage mid-body decreased by 20 %, with simultaneous increase observed in the flexure-pylon flutter speed.