GAS TURBINE ENGINE WITH INERTIAL PARTICLE SEPARATOR
First Claim
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1. An inertial particle separator configured for communicating with an engine inlet of an aircraft engine having an axis, the inertial particle separator comprising:
- a main duct having an inlet fluidly connected to an environment outside of the aircraft engine and an outlet configured for being fluidly connected to the engine inlet, the main duct having a first side facing away from the axis and a second side opposed to the first side and facing toward the axis, the inlet for receiving an airflow from the environment along a first direction;
a bypass duct stemming from the main duct between the inlet and the outlet, the bypass duct being fluidly connected to the main duct; and
a splitter defined by an intersection of the main duct and the bypass duct, the splitter having a leading edge,wherein the second side of the main duct at the inlet extends from the inlet along a second direction defining an angle (a) of at most 45 degrees with the first direction,wherein, the main duct has a radially outward-most section between the inlet and the splitter, the radially-outward most section having a height (H1) extending from the first side to the second side and a width (W1), wherein W1/H1≥
0.5,wherein a length (G1) from the second side to the first side and from the radially-outward most section along a direction parallel to the second direction is at least as great as the height (H1) of the main duct at the radially outward-most section,wherein a height (H2) of the main duct from the leading edge of the splitter and the second side of the main duct is at most four times the height (H1) of the main duct at the radially outward-most section, andwherein a height (S1) of the bypass duct from the first side at an end of the length (G1) to the leading edge is at least 20% of the height (H1) of the main duct at the radially outward-most section.
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Abstract
There is disclosed an inertial particle separator communicating with an engine inlet. The inertial particle separator has: a main duct body; a bypass duct; and a splitter defined by an intersection of the main duct and the bypass duct. The main duct and the bypass duct having particular geometric characteristics. A method of separating particles via inertia in an aircraft engine inlet is also provided.
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Citations
20 Claims
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1. An inertial particle separator configured for communicating with an engine inlet of an aircraft engine having an axis, the inertial particle separator comprising:
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a main duct having an inlet fluidly connected to an environment outside of the aircraft engine and an outlet configured for being fluidly connected to the engine inlet, the main duct having a first side facing away from the axis and a second side opposed to the first side and facing toward the axis, the inlet for receiving an airflow from the environment along a first direction; a bypass duct stemming from the main duct between the inlet and the outlet, the bypass duct being fluidly connected to the main duct; and a splitter defined by an intersection of the main duct and the bypass duct, the splitter having a leading edge, wherein the second side of the main duct at the inlet extends from the inlet along a second direction defining an angle (a) of at most 45 degrees with the first direction, wherein, the main duct has a radially outward-most section between the inlet and the splitter, the radially-outward most section having a height (H1) extending from the first side to the second side and a width (W1), wherein W1/H1≥
0.5,wherein a length (G1) from the second side to the first side and from the radially-outward most section along a direction parallel to the second direction is at least as great as the height (H1) of the main duct at the radially outward-most section, wherein a height (H2) of the main duct from the leading edge of the splitter and the second side of the main duct is at most four times the height (H1) of the main duct at the radially outward-most section, and wherein a height (S1) of the bypass duct from the first side at an end of the length (G1) to the leading edge is at least 20% of the height (H1) of the main duct at the radially outward-most section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An aircraft engine having an inertial particle separator communicating with an engine inlet of the aircraft engine, the inertial particle separator comprising:
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a main duct having an inlet fluidly connected to an environment outside of the turboprop or turboshaft gas turbine engine and an outlet configured for being fluidly connected to the engine inlet, the main duct having an inner main duct wall and an outer main duct wall spaced apart from the inner main duct wall; a bypass duct stemming from the main duct between the inlet and the outlet, the main duct being fluidly connected to the main duct, the bypass duct having an inner bypass duct wall and an outer bypass duct wall; and a splitter defined by an intersection of the outer main duct wall and the inner bypass duct wall, the splitter having a leading edge, wherein the duct has a first segment, a second segment, and a third segment in serial flow communication, the first segment and the second segment being located upstream of the splitter relative to a flow of air through the duct, the bypass duct located in the third segment, wherein, at an upstream end of the first segment, an angle (α
) between the inner main duct wall and a reference line defined by a direction of an airflow entering the main duct ranges from 0 to 45 degrees,wherein, a cross-section of the main duct taken in a plane perpendicularly intersecting the reference line and located at an interface between the first segment and the second segment is characterized by a height (H1) and a width (W1), wherein W1/H1≥
0.5,wherein a length (G1) of the second segment is defined from a first point located on the inner main duct wall at the interface between the first segment and the second segment and a second point located on the outer main duct wall, the length taken along a direction parallel to the inner main duct wall at the upstream end of the first segment, wherein G1/H1≥
1.0;wherein a height (H2) of the main duct at the third segment is defined between the leading edge and the inner main duct wall, the height (H2) extending perpendicularly to both of the splitter to the inner main duct wall, wherein H2/H1≤
4,wherein a height (S1) of the bypass duct is defined from the second point and the leading edge of the splitter, wherein S1/H1≥
0.2. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A method of separating particles in an engine inlet of an aircraft engine, comprising:
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receiving a flow of ambient air in an incoming direction from an environment in a duct; directing the flow away from a centerline of the aircraft engine in a second direction defining an angle (α
) of at most 45 degrees with the incoming direction up to a radially outward-most section of the duct where a width (W1) is at least 50% of a height (H1) thereof;directing the flow toward the centerline from the radially outward-most section of the duct along a portion of the duct having a length (G1) taken along the second direction thereby separating the flow in an air flow and a particle flow via inertia, the length (G1) extending from the radially-outward most section at a side of the duct facing the centerline to an opposed side of the duct facing away from the centerline, and being at least as great as the height (H1); directing the air flow in an air inlet duct having a height (H2) being at most 4 times the height (H1) of the duct at the radially-outward most section; and directing the particle flow in a bypass duct having a height (S1) being at least 20% of the height (H1) at the radially-outward most section of the duct and being defined from and end of the length (G1) to a location where the flow is separated in the air flow and the particle flow. - View Dependent Claims (19, 20)
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Specification