Patent ID: 8061961
Filing Date: 2011-11-22
Classification: F01D,F02K,F05D

Abstract:
1. A fluid expansion device into which a fluid is adapted to enter at a first pressure, through which the fluid is adapted to flow, and from which the fluid is adapted to exit at a second pressure that is less than the first pressure, the fluid expansion device comprising: a stationary first member comprising an annular section; a stationary second member comprising a ring and defining first and second surfaces; a plurality of stationary blades extending from the second surface of the second member; a plurality of rotary blades extending from a rotatable wheel, the plurality of stationary blades directing the fluid to the plurality of rotary blades to thereby impel the wheel to rotate; and a plurality of first acoustic resonators disposed between adjacent ones of the plurality of stationary blades, each of the plurality of first acoustic resonators comprising: wherein one or more of the plurality of first acoustic resonators are sized to attenuate around a frequency of acoustic energy generated as the fluid flows past the plurality of stationary blades.