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公开(公告)号：US20210108579A1
公开(公告)日：2021-04-15
申请号：US17061856
申请日：2020-10-02
Applicant: PRATT & WHITNEY CANADA CORP.
Inventor： James Robert JARVO , Cédric SAINTIGNAN , Hytham MOKHTAR
Abstract: Fuel systems of gas turbine engines of aircraft, and associated methods are provided. The fuel systems and methods can permit reverse purging of one or more fuel manifolds of a gas turbine engine to prevent coking in some modes of operation. A fuel system includes first and second fuel manifolds fluidly connectable to a combustor of the gas turbine engine. A valve is operatively disposed between the second fuel manifold and a fuel supply line for controlling fuel supply to the second fuel manifold. A reservoir includes a movable piston disposed therein and dividing the reservoir into a first chamber and a second chamber. The first chamber is fluidly connectable to the fuel supply line or to a fuel purge line via the valve. The second chamber is in fluid communication with the second fuel manifold to receive residual fuel from the second fuel manifold.
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公开(公告)号：US20240151183A1
公开(公告)日：2024-05-09
申请号：US17983595
申请日：2022-11-09
Applicant: PRATT & WHITNEY CANADA CORP.
Inventor： James Robert JARVO , Cédric SAINTIGNAN , Hytham MOKHTAR
CPC classification number: F02C7/232 , F02C7/222 , F05D2220/323 , F05D2240/35
Abstract: Fuel systems of gas turbine engines of aircraft, and associated methods are provided. The fuel systems and methods can permit reverse purging of one or more fuel manifolds of a gas turbine engine to prevent coking in some modes of operation. A fuel system includes first and second fuel manifolds fluidly connectable to a combustor of the gas turbine engine. A valve is operatively disposed between the second fuel manifold and a fuel supply line for controlling fuel supply to the second fuel manifold. A reservoir includes a movable piston disposed therein and dividing the reservoir into a first chamber and a second chamber. The first chamber is fluidly connectable to the fuel supply line or to a fuel purge line via the valve. The second chamber is in fluid communication with the second fuel manifold to receive residual fuel from the second fuel manifold.
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公开(公告)号：US20200332725A1
公开(公告)日：2020-10-22
申请号：US16591857
申请日：2019-10-03
Applicant: PRATT & WHITNEY CANADA CORP.
Inventor： Michael Paul SMITH , Hytham MOKHTAR , Daniel ARNONE , Patrick MANOUKIAN
Abstract: A method of operating a gas turbine engine having a bleed air system with a switching valve, operable to switch between multiple air sources depending on an operating mode of the gas turbine engine (e.g. a motive powered mode or a standby mode), is described. The method includes operating the switching valve to provide pressurized air from a selected one or more of the multiple air sources to a cavity of the gas turbine engine having seals, and testing the switching valve to determine if the switching valve is functioning normally or abnormally. The switching valve is functioning normally when operable to switch between the multiple air sources and is functioning abnormally when switching between the multiple air sources is not possible. If the switching valve is determined to be functioning abnormally, the gas turbine engine is controlled to prevent a change of the operating mode.
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公开(公告)号：US20200080479A1
公开(公告)日：2020-03-12
申请号：US16125874
申请日：2018-09-10
Applicant: PRATT & WHITNEY CANADA CORP.
Inventor： Ignazio BROCCOLINI , Hytham MOKHTAR
Abstract: An ice separator of a fuel system for a gas turbine engine is provided. The ice separator comprises an inlet duct extending along an inlet direction and an outlet duct. The inlet duct branching off into a first branch duct and a second branch duct. The first and second branch ducts merging into the outlet duct. The first branch duct having at least a portion aligned with the inlet direction and the second branch duct extending away from the inlet direction upwardly toward the outlet duct, and a strainer disposed across the first branch duct.
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