Dirt extraction apparatus for a gas turbine engine

Patent metadata

Field	Value
Publication number	US-2016186601-A1
Application number	US-201514954240-A
Country	US
Kind code	A1
Filing date	Nov 30, 2015
Priority date	Dec 31, 2014
Publication date	Jun 30, 2016
Grant date	—

Abstract

A centrifugal compressor apparatus includes: an impeller mounted for rotation about a central longitudinal axis, the impeller including an impeller disk carrying an array of impeller blades around its periphery; a diffuser disposed downstream of the impeller, configured to diffuse and turn airflow discharged from the impeller; an extraction scoop disposed in fluid communication with the impeller and with a plenum disposed adjacent the impeller, and a dirt collector disposed in fluid communication with the plenum and configured to trap dirt therein.

First claim

What is claimed is:

1 . A centrifugal compressor apparatus, comprising:
an impeller mounted for rotation about a central longitudinal axis, the impeller including an impeller disk carrying an array of impeller blades around its periphery; a diffuser disposed downstream of the impeller, configured to diffuse and turn airflow discharged from the impeller; an extraction scoop disposed in fluid communication with the impeller and with a plenum disposed adjacent the impeller, and a dirt collector disposed in fluid communication with the plenum and configured to trap dirt therein.

2 . The apparatus of claim 1 wherein the diffuser is disposed radially outboard of the impeller and includes a plurality of diffuser passageways.

3 . The apparatus of claim 1 wherein a shroud assembly defining a convex-curved outer flowpath surface is positioned to closely surround the impeller blades.

4 . The apparatus of claim 3 where in the extraction scoop is formed as a part of the diffuser and positioned radially outboard of the shroud.

5 . The apparatus of claim 3 where in the extraction scoop is formed as a part of the shroud assembly.

6 . The apparatus of claim 3 wherein an outer portion of the shroud assembly is divided into forward and aft segments defining a V-shape, and the extraction scoop is defined by the V-shape.

7 . The apparatus of claim 6 wherein a baffle pierced with impingement holes spans the forward and aft segments.

8 . The apparatus of claim 1 wherein the extraction scoop has a diffuser shape.

9 . The apparatus of claim 1 wherein an annular array of vanes are disposed in the extraction scoop.

10 . The apparatus of claim 1 wherein a bypass duct separate from the diffuser communicates with the dirt collector.

11 . The apparatus of claim 1 wherein the plenum is defined in part by an outboard plenum wall having an impingement hole formed therein, the impingement hole positioned to direct air flow to the dirt collector.

12 . The apparatus of claim 1 wherein the dirt collector comprises a porous ceramic or metallic material.

13 . The apparatus of claim 1 further including at least one media wash port disposed in communication with the dirt collector.

14 . The apparatus of claim 13 comprising:
an inlet media wash port disposed downstream of the dirt collector; and
an outlet media wash port disposed upstream of the dirt collector.

15 . A centrifugal compressor apparatus, comprising:
an impeller mounted for rotation about a central longitudinal axis, the impeller including an impeller disk carrying an array of impeller blades around its periphery; a diffuser disposed downstream of the impeller, configured to diffuse and turn airflow discharged from the impeller, and disposed radially outboard of the impeller and including a plurality of diffuser passageways; an extraction scoop disposed in fluid communication with the impeller and with a plenum disposed adjacent the impeller, a dirt collector disposed in fluid communication with the plenum and configured to trap dirt therein; and at least one media wash port disposed in communication with the dirt collector.

Assignees

• Gen Electric

Inventors

• Manning Robert Francis
• Correia Victor Hugo Silva
• Parker David Vickery

Classifications

• F01D25/005

  Selecting particular materials · CPC title

• F05D2260/607

  Preventing clogging or obstruction of flow paths by dirt, dust, or foreign particles · CPC title

• F02C7/232

  Fuel valves {(control of fuel supply by means of fuel metering valves F02C9/263)}; Draining valves or systems (valves in general F16K) · CPC title

• F04D29/701 Primary

  especially adapted for elastic fluid pumps · CPC title

• F01D25/32

  Collecting of condensation water; Drainage {; Removing solid particles} · CPC title