Michael Adams Weathers

US Patent:

20090065295, Mar 12, 2009

Filed:

Sep 11, 2007

Appl. No.:

11/853422

Inventors:

Sanjay V. Sherikar - Mission Viejo CA, US
Michael J. Weathers - El Paso TX, US

International Classification:

F16L 55/02

US Classification:

181233

Abstract:

A liner system for a steam outlet pipe of a turbine bypass system comprises a liner mounted in spaced coaxial relation to the inner pipe wall such that an annular cavity is defined between the liner and the steam outlet pipe. The cavity is open on an upstream end and closed on a downstream end such that a quarter-wavelength resonator is formed for attenuating noise associated with a flow of superheated steam passing through the steam pipe. The liner may include a plurality of perforations to further attenuate noise in the steam outlet pipe. The open upstream end and closed downstream end of the cavity increases pressure within the cavity to prevent cooling water from entering the perforations and contacting the inner pipe wall. A wire mesh disposed against the outer liner wall may block cooling water penetration through the perforations and may further attenuate noise associated with the flow of superheated steam.