초록 ▼

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 th

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.

대표청구항 ▼

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.] A system for eliminating flow-induced cavity resonance comprising:(a) a closed or nearly closed end fluid flow passage having an inlet with an opening defined between an upstream i

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.] A system for eliminating flow-induced cavity resonance comprising:(a) a closed or nearly closed end fluid flow passage having an inlet with an opening defined between an upstream inlet edge and a downstream inlet edge, exterior fluid flowing over the opening across the upstream and downstream inlet edges to form a shear layer; and(b) a flow control device including an inlet guide vane having a leading edge and a trailing edge, the vane being connected to the inlet at a fixed stationary orientation in which the vane leading edge intercepts the exterior fluid flow shear layer and the vane trailing edge is located within the passage; the flow control device promoting destruction of flow-induced cavity resonance within the closed or nearly closed end passage.