Rotating machinery noise control device
First Claim
1. A flow control apparatus for balancing forces experienced by a rotating element of a rotating machine, the rotating element having a plurality of vanes, said apparatus comprising:
- at least one fluid emitter disposed in the vicinity of said rotating element for discharging pressurized fluid on said rotating element;
at least one duct coupling said fluid emitter with a high pressure fluid source for supplying said pressurized fluid; and
a flow controller operably coupled to said fluid emitter for controlling a pressure of said pressurized fluid directed against said vanes to neutralize uneven forces experienced by said vanes during operation of said rotating element.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention provides an apparatus and method for reducing noise caused by a rotating component. According to the invention, the apparatus comprises a plurality of emitters adapted to emit fluid under variable pressure in the vicinity of the rotating components such that unsteady forces on the rotating component are reduced or eliminated. Preferably, the apparatus includes at least one duct extending between the emitters and a high pressure area for directing the fluid under pressure. At least one flow controller is disposed along the duct to vary the pressure of the injected flow emitted from the emitters.
25 Citations
19 Claims
-
1. A flow control apparatus for balancing forces experienced by a rotating element of a rotating machine, the rotating element having a plurality of vanes, said apparatus comprising:
-
at least one fluid emitter disposed in the vicinity of said rotating element for discharging pressurized fluid on said rotating element; at least one duct coupling said fluid emitter with a high pressure fluid source for supplying said pressurized fluid; and a flow controller operably coupled to said fluid emitter for controlling a pressure of said pressurized fluid directed against said vanes to neutralize uneven forces experienced by said vanes during operation of said rotating element. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. An apparatus for reducing or eliminating unsteady forces on a plurality of vanes of a rotating component of a rotating device, said apparatus comprising:
-
a plurality of fluid emitters disposed proximate said vanes of said rotating component for emitting pressurized fluid against said vanes; at least one duct extending between said emitters and a source of said pressurized fluid; and a flow controller interposed along said duct for varying a pressure of said pressurized fluid emitted from said emitters so as to enable pressurized fluid emitted from said emitters to neutralize said unsteady forces. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
-
-
15. A method for reducing or eliminating unsteady forces on a plurality of vanes of a rotating element of a rotating machine, said method comprising the steps of:
-
determining the existence of said unsteady forces on said blades; conducting a fluid under pressure from a high pressure area of said rotating machine to at least one fluid emitter disposed proximate said rotating vanes; and controlling a pressure of emitted fluid from said emitter according to a position of said rotating vanes to equalize the pressure on said vanes such that the pressure on all of said vanes is approximately equal for an entire revolution of said rotating element. - View Dependent Claims (17, 18, 19)
-
-
16. The method of claim 16, wherein said vanes comprise a jet engine blade row and said high pressure area comprises a location in the vicinity of a jet engine stator.
Specification