Flush inlet scoop design for aircraft bleed air system
AssigneeHoneywell International Inc.
InventorsRobert Hoover, Morris Anderson, Robert Romano, Jeff Mendoza, Dan Judd, Don Weir
Life of this patent
Estimating the term…
Abstract
A bleed air duct that preferably includes an inlet section configured to include a flush scoop and a louver. The louver is located and configured such that in the desired operating flow range of the duct, the fluid entering the flush scoop is disturbed and as a result creates a low pressure region downstream of the louver. The low pressure region substantially eliminates the generation of any pressure pulses and acoustic resonance also known as Helmholtz resonance.
Claims20
A flush inlet scoop duct for a bleed air system, comprising:
- a duct having a wall that defines a flow passageway, and including at least a flush scoop in fluid communication with the flow passageway, the flush scoop coupled to a fan bypass duct to receive a fan bleed airflow from the fan bypass duct;
- and
- a louver coupled to a flush scoop inlet and splitting the fan bleed airflow to the flush scoop inlet into two passages, the louver configured to create a low pressure region within the flow passageway, downstream of the louver.
A bleed air duct system for a vehicle engine including a flush inlet scoop, the bleed air duct system comprising:
- a fan bleed air duct having a wall that defines a flow passageway, the fan bleed air duct adapted to receive a flow of fluid from the vehicle engine;
- an outer fan bleed air duct having a wall that defines a flow passageway, and including at least a flush scoop in fluid communication with the flow passageway of the outer fan bleed air duct, the flush scoop coupled to an outer wall of the fan bleed air duct;
- and
- a louver coupled to the flush scoop and extending into the flow of fluid received from the fan bleed air duct, the louver configured to create a low pressure region within the flow passageway of the fan bleed air duct, downstream of the louver.
A turbine bleed air duct system comprising:
- a gas turbine engine comprising:
- an engine case having a bleed air supply plenum disposed therein,
- an intake section, a compressor section a combustion section and a turbine section all mounted in flow series within the engine case;
- a fan bleed air duct having a wall that defines a flow passageway, the fan bleed air duct adapted to receive a flow of fluid from the intake section;
- and
- an outer fan bleed air duct having a wall that defines a flow passageway, and including at least a flush scoop in fluid communication with the flow passageway of the outer fan bleed air duct, the flush scoop including an inlet section and a scoop throat, the inlet section defined by a forward portion and a highlite, the flush scoop coupled to an outer wall of the fan bleed air duct;
- and
- a louver coupled to the flush scoop and extending into the flow of fluid received from the fan bleed air duct, the louver configured to create a low pressure region within the flow passageway of the fan bleed air duct, downstream of the louver.
Dependencies are inferred from the claim text.