Asymmetric turboprop booster
First Claim
1. A booster-compressor assembly for supercharging air into a core engine that powers propellers of a turboprop aircraft engine, said assembly comprising:
- a partially asymmetric annular booster duct aft of the propellers disposed about a centerline;
said booster duct having at least one symmetric annular rotor section with a row of rotor blades disposed therein;
said booster duct having a booster flowpath including a core flowpath to a core engine inlet and a bypass flowpath around said core engine inlet, said flowpaths circumscribed about said centerline and not symmetric with respect to each other; and
a low bypass flow rate means for setting booster flow rate through said booster flowpath such that a bypass flow rate per unit area through said bypass flowpath is substantially less than a core flow rate per unit area through said core flowpath.
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Accused Products
Abstract
A booster-compressor assembly for supercharging air into a core engine that powers propellers of a turboprop aircraft engine includes an asymmetric annular booster duct aft of the propellers and disposed about a centerline with at least one symmetric annular rotor section with a row of rotor blades disposed therein. The booster duct has a booster flowpath that includes a core flowpath to a core engine inlet and a bypass flowpath around the core engine inlet and the flowpaths circumscribed about the centerline and not symmetric with respect to each other. A low bypass flow rate means sets the airflow through the bypass flowpath such that a bypass flow rate per unit area through the bypass flowpath is substantially less than a core flow rate per unit area through the core flowpath.
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Citations
19 Claims
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1. A booster-compressor assembly for supercharging air into a core engine that powers propellers of a turboprop aircraft engine, said assembly comprising:
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a partially asymmetric annular booster duct aft of the propellers disposed about a centerline; said booster duct having at least one symmetric annular rotor section with a row of rotor blades disposed therein; said booster duct having a booster flowpath including a core flowpath to a core engine inlet and a bypass flowpath around said core engine inlet, said flowpaths circumscribed about said centerline and not symmetric with respect to each other; and a low bypass flow rate means for setting booster flow rate through said booster flowpath such that a bypass flow rate per unit area through said bypass flowpath is substantially less than a core flow rate per unit area through said core flowpath. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification