Aeronautics and astronautics – Aircraft sustentation – Sustaining airfoils
Patent
1997-12-19
2000-04-18
Poon, Peter M.
Aeronautics and astronautics
Aircraft sustentation
Sustaining airfoils
244209, 244 53B, 137 151, B64C 2106
Patent
active
060505273
ABSTRACT:
A flow control device and method for eliminating flow-induced cavity resonance within a closed or nearly closed end flow passage (20) having an inlet opening (30) defined between an upstream inlet edge (32) and a downstream inlet edge (34). The passage accepts exterior fluid flow (38) therein via the opening (30). The flow control device includes a stationary inlet guide vane (44) having a leading edge (46), a trailing edge (48), and a number of support members (50) to connect the vane to the inlet. The vane (44) is positioned such that the vane leading edge intercepts the exterior fluid flow shear layer, and the vane trailing edge extends into the passage at the inlet. In a preferred embodiment, the inlet guide vane is located approximately midway between the upstream and downstream inlet edges. The inlet guide vane is cross-sectionally shaped as a cambered airfoil. Flow-induced cavity resonance is reduced or eliminated in the closed or nearly closed end passage through the interception of the free shear layer passing over the inlet opening with an inlet guide vane flow control device.
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Hebert Leonard J.
Miller Wendell R.
Nesbitt Eric H.
Piro Jerry
Sangwin Michael L.
Ducker, Jr. Charles R.
Poon Peter M.
The Boeing Company
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