EP0211513A1
Expired / Lapsed
EP
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Inlet particle separator
Assignee: Rolls Royce PLC
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Filing: 1986-06-27
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Granted: —
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Expires: 2006-06-27
Abstract
Abstract To prevent dust and other debris from entering the compressor (12) of a gas turbine engine (10) an inlet particle separator (30) is provided. Air contaminated with dust and debris is induced into a scavenge chamber (32). An exhaust vent (35) is provided from the scavenge chamber (32) through which the contaminated air is ejected to atmosphere. Flow dividers (40,42,44) are positioned in the scavenge chamber to ensure that the flow into the chamber (32) is uniform around the inlet passage (28).
Inventors
- 👤 John Eryl Jenkins
- 👤 John Sperinck
- 👤 Michael John Buller
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 12:07
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/04; F02C7/05; F02C7/052
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
129 words
An inlet particle separator (30) comprising: an annular intake duct (28) for receiving intake gas containing particles; a circumferentially extending scavenge chamber (32) in flow communication with the intake duct (28); means (29,31) for directing a flow of gas and particles into the scavenge chamber (32) from the intake duct (28); and extraction means (34) for extracting the directed flow of gas and particles from the scavenge chamber (32) into an exhaust vent (35); characterised in that; the scavenge chamber (32) contains one or more flow dividers (40,42,44) dimensioned and arranged to provide a plurality of flow paths between the intake duct (28) and the exhaust vent (35) to minimise circumferential variation in mass flow of gas and particles into the scavenge chamber (32) from the intake duct (28).
Claim 2
Dependent Claim
129 words
An inlet particle separator (30) comprising: an annular intake duct (28) for receiving intake gas containing particles; a circumferentially extending scavenge chamber (32) in flow communication with the intake duct (28); means (29,31) for directing a flow of gas and particles into the scavenge chamber (32) from the intake duct (28); and extraction means (34) for extracting the directed flow of gas and particles from the scavenge chamber (32) into an exhaust vent (35); characterised in that; the scavenge chamber (32) contains one or more flow dividers (40,42,44) dimensioned and arranged to provide a plurality of flow paths between the intake duct (28) and the exhaust vent (35) to minimise circumferential variation in mass flow of gas and particles into the scavenge chamber (32) from the intake duct (28).
Claim 3
Dependent Claim
44 words
An inlet particle separator (30) as claimed in claim 1 wherein the flow path length between a point on the intake duct (28) and the exhaust vent (35) remains substantially constant as the geometric distance between the point and the exhaust vent (35) increases.
Claim 4
Dependent Claim
41 words
An inlet particle separator (30) as claimed in claim 1 or claim 2 wherein at least one flow divider (44) is shaped to form a flow restriction in at least one flow path to further minimise circumferential variation in mass flow.
Claim 5
Dependent Claim
31 words
An inlet particle separator (30) as claimed in any preceding claim wherein th p flow dividers (40,42,44) are shaped and arranged such that each flow path carries the same mass flow.
Claim 6
Dependent Claim
30 words
An inlet particle separator (30) as claimed in any preceding claim wherein each flow path is shaped and arrange such that each flow path is of substantially the same length.
Claim 7
Dependent Claim
31 words
An inlet particle separator as claimed in any preceding claim wherein the scavenge chamber (32) is of decreasing internal section in a circumferential direction extending away from the exhaust vent (35).
Claim 8
Dependent Claim
90 words
An inlet particle separator as claimed in any preceding claim wherein the means for directing a flow of gas and particles into the scavenge chamber from the intake duct comprises a central hub (29) forming a radially inner boundary of the annular intake duct (28) shaped to direct the intake gas containing particles into the scavenge chamber (32) and an annular splitter nose (31) located to split the intake gas containing particles into a relatively uncontaminated core flow and a flow of gas and particles into the scavenge chamber (32).
Claim 9
Dependent Claim
31 words
An inlet particle separator as claimed in any preceding claim wherein the exhaust vent (35) is circular and of a diameter equal to the radial size of th scavenge chamber (3?).
Claim 10
Dependent Claim
17 words
An inlet particle separator as claimed in any preceding claim wherein the intake duct (32) is axis-symmetric.
Claim 11
Dependent Claim
16 words
An inlet particle separator as claimed in any preceding claim wherein the intake gas is air.
Claim 12
Dependent Claim
34 words
An inlet particle separator as claimed in any preceding claim wherein the inlet particle separator is attached to a gas turbine engine (10) and the intake gas is air supplied to a compressor (12).
References Cited (Backward Citations)
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