# US 11,028,779 B2 · Gas turbine engine bypass drainage systems > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,028,779 B2 - Document ID: US11028779B2 - Status: Granted - Kind: B2 - Application number: 16/263,268 - Filed: 2019-01-31 - Published: 2020-08-06 - Granted: 2021-06-08 - Earliest claimed: 2019-01-31 - Assignees: Raytheon Technologies Corporation - Applicants: United Technologies Corporation - Inventors: Dmitriy B. Sidelkovskiy; James Evans - Web page: https://patentgrep.com/patent/US11028779B2 ## CPC - F02C 7/00: Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants (controlling F02C9/00) - F02C 7/30: Preventing corrosion {or unwanted deposits} in gas-swept spaces - F01D 25/00: Component parts, details, or accessories, not provided for in, or of interest apart from, other groups - F01D 25/24: Casings (modified for heating or cooling F01D25/14); Casing parts, e.g. diaphragms, casing fastenings (casings for rotary machines or engines in general F16M {; special arrangements in stators dealing with breaking-off of part of rotor F01D21/045}) - F01D 25/32: Collecting of condensation water; Drainage {; Removing solid particles} - F02K 3/00: Plants including a gas turbine driving a compressor or a ducted fan - F05D 2260/602: Drainage - F05D 2260/605: Venting into the ambient atmosphere or the like - F05D 2260/608: Aeration, ventilation, dehumidification or moisture removal of closed spaces - Y02T 50/60: Efficient propulsion technologies, e.g. for aircraft - F02C: GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS (construction of turbines F01D; jet-propulsion plants F02K; construction of compressors or fans F04; generating combustion products of high pressure or high velocity F23R; using gas turbines in compression refrigeration plants F25B11/00) - F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D) - F02K: JET-PROPULSION PLANTS (features of jet-propulsion plants common to gas-turbine plants, air intakes or fuel supply control of air-breathing jet-propulsion plants F02C7/00, F02C9/00) - F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract Core housings for gas turbine engines are described. The core housings include a housing surface defining an exterior surface of the core housing, a housing aperture arranged on the housing surface, the housing aperture configured to enable fluid communication between an external environment and an interior of the core housing, a drainage hole arranged upstream relative to the housing aperture, the drainage hole configured to enable draining of a fluid from an interior of the core housing to the external environment, and a redirection device arranged to receive a fluid from the drainage hole and direct such fluid away from the housing aperture. ## Claims ### Claim 1 A core housing for a gas turbine engine, the core housing comprising: a housing surface defining an exterior surface of the core housing; a housing aperture arranged on the housing surface, the housing aperture configured to enable fluid communication between an external environment and an interior of the core housing; a drainage hole arranged upstream relative to the housing aperture, the drainage hole configured to enable draining of a fluid from the interior of the core housing to the external environment; and a redirection device arranged to receive the fluid from the drainage hole and direct said fluid away from the housing aperture, wherein the redirection device has a channel body defining a channel extending between a channel inlet and a channel outlet, wherein the channel body comprises a first section and a second section, wherein the first section includes the channel inlet and the second section includes the channel outlet, and wherein the first section extends in a first axial direction and the second section extends in a second axial direction, wherein the first axial direction is different from the second axial direction. ### Claim 2 (depends on 1) The core housing of claim 1, wherein the redirection device is mounted to the housing surface. ### Claim 3 (depends on 1) The core housing of claim 1, wherein the redirection device is integrally formed with the core housing. ### Claim 4 (depends on 1) The core housing of claim 1, wherein the channel inlet is arranged proximate the drainage hole and at least partially covering the drainage hole. ### Claim 5 (depends on 1) The core housing of claim 1, wherein the channel inlet is a closed channel inlet. ### Claim 6 (depends on 1) The core housing of claim 1, wherein the channel body tapers from the channel inlet to the channel outlet. ### Claim 7 (depends on 6) The core housing of claim 6, wherein the channel inlet has an inlet height defined from the housing surface and the channel outlet has an outlet height defined from the housing surface, wherein the inlet height is less than the outlet height. ### Claim 8 (depends on 1) The core housing of claim 1, wherein the first section and the second section form a continuous, curved channel body. ### Claim 9 (depends on 1) The core housing of claim 1, wherein a cross-sectional area of the channel is equal to or greater than 0.6 times a cross-sectional area of the drainage hole. ### Claim 10 (depends on 1) The core housing of claim 1, wherein the redirection device is formed from the same material as the core housing. ### Claim 11 (depends on 1) The core housing of claim 1, wherein the redirection device is formed from a material different than the core housing. ### Claim 12 (depends on 1) The core housing of claim 1, wherein the redirection device is attached to the housing surface by at least one of an adhesive, bonding, welding, and a mechanical fastener. ### Claim 13 (depends on 1) The core housing of claim 1, wherein the redirection device is mounted to the housing surface at at least one of a gravitational low point and a geometric low point of the core housing. ### Claim 14 (depends on 1) The core housing of claim 1, further comprising one or more core components installed within the core housing. ### Claim 15 (depends on 14) The component of claim 14, wherein the one or more core components comprise the gas turbine engine. ### Claim 16 A gas turbine engine comprising: a core housing, the core housing comprising: a housing surface defining an exterior surface of the core housing; a housing aperture arranged on the housing surface, the housing aperture configured to enable fluid communication between an external environment and an interior of the core housing; a drainage hole arranged upstream relative to the housing aperture, the drainage hole configured to enable draining of a fluid from the interior of the core housing to the external environment; and a redirection device arranged to receive the fluid from the drainage hole and direct said fluid away from the housing aperture; one or more core components mounted within the core housing; a nacelle arranged about the core housing; and a bifurcation structure extending between and connecting the core housing to the nacelle, wherein the core housing is mounted within the nacelle by at least the bifurcation structure, wherein the redirection device is positioned proximate a juncture between the bifurcation structure and the core housing. ### Claim 17 (depends on 16) The gas turbine engine of claim 16, wherein the external environment is a bypass flow path define between the housing surface and an interior surface of the nacelle. ### Claim 18 (depends on 16) The gas turbine engine of claim 16, wherein the redirection device is at least one of mounted to the housing surface and integrally formed with the core housing. ### Claim 19 (depends on 16) The gas turbine engine of claim 16, wherein the redirection device is one of formed from the same material as the core housing and formed from a material different than the core housing. ### Claim 20 (depends on 16) The gas turbine engine of claim 16, wherein the redirection device is attached to the housing surface by at least one of an adhesive, bonding, welding, and a mechanical fastener.