A jet noise suppressor including a nozzle having a front end and an opposed rear end, spokes extending radially inward from the nozzle, the spokes defining vents, and a center-body connected to the spokes and in fluid communication with the vents, the center-body being positioned centrally within th
A jet noise suppressor including a nozzle having a front end and an opposed rear end, spokes extending radially inward from the nozzle, the spokes defining vents, and a center-body connected to the spokes and in fluid communication with the vents, the center-body being positioned centrally within the nozzle and including a closed front end and an open rear end, wherein the front end of the nozzle entrains a first ambient airflow passing through the nozzle and exiting the rear end of the nozzle proximate a periphery of the nozzle, and wherein the vents entrain a second ambient airflow passing through the center-body and exiting the rear end of the nozzle proximate a center of the nozzle.
대표청구항▼
1. A jet noise suppressor comprising: a nozzle configured to be coaxially aligned with a jet engine, said nozzle comprising a front end and an opposed rear end;spokes, each spoke comprising a first end connected to said nozzle and a second end extending radially inward from said nozzle, said spokes
1. A jet noise suppressor comprising: a nozzle configured to be coaxially aligned with a jet engine, said nozzle comprising a front end and an opposed rear end;spokes, each spoke comprising a first end connected to said nozzle and a second end extending radially inward from said nozzle, said spokes defining vents; anda center-body connected to said second ends of said spokes and in fluid communication with said vents, said center-body being positioned centrally within said nozzle and comprising a closed front end and an open rear end,wherein an open area between said front end of said nozzle and said jet engine entrains a first ambient airflow passing through said nozzle and exiting said rear end of said nozzle proximate a periphery of said rear end of said nozzle, said open area being upstream of said vents with respect to said first ambient airflow, andwherein said vents entrain a second ambient airflow passing through said center-body and exiting said rear end of said nozzle proximate a center of said nozzle. 2. The jet noise suppressor of claim 1, wherein said spokes are equally spaced apart relative to one another. 3. The jet noise suppressor of claim 2, wherein said spokes comprise three spokes. 4. The jet noise suppressor of claim 1, wherein said nozzle further comprises a wall structure extending circumferentially around a center axis, and wherein said vents define ambient airflow inlets through said wall structure. 5. The jet noise suppressor of claim 1, wherein said center-body further comprises lobes extending radially outward proximate said open rear end of said center-body, said lobes directing said second ambient airflow toward said periphery of said nozzle. 6. The jet noise suppressor of claim 1, wherein said jet engine comprises a rear end and exhausts exhaust streams from said rear end of said jet engine, and wherein said exhaust streams exiting from said rear end of said jet engine enter said front end of said nozzle, pass through said nozzle, and exit said rear end of said nozzle. 7. The jet noise suppressor of claim 6, wherein said first ambient airflow surrounds said exhaust streams and mixes with said exhaust streams, and wherein said second ambient airflow is surrounded by said exhaust streams and mixes with said exhaust streams. 8. The jet noise suppressor of claim 1, further comprising a coupling member removably connected to said jet engine of an aircraft, wherein said coupling member positions said front end of said nozzle relative to a rear end of said jet engine. 9. The jet noise suppressor of claim 1, wherein said nozzle is a first nozzle and said jet noise suppressor further comprises a second nozzle, and wherein said first nozzle and said second nozzle are each coaxially aligned with a respective jet engine of a pair of jet engines of an aircraft. 10. The jet noise suppressor of claim 1, wherein said center-body comprises a variable cross-sectional shape defining at least one inwardly curved region. 11. The jet noise suppressor of claim 1, further comprising a coupling member removably connected to a fuselage of an aircraft, wherein said coupling member positions said front end of said nozzle relative to a said rear end of said jet engine. 12. An aircraft comprising: a jet engine comprising a center axis and a rear end, said jet engine being capable of generating exhaust streams to propel said aircraft; anda jet noise suppressor comprising: a nozzle coaxially aligned with said jet engine, said nozzle comprising a front end positioned relative to said rear end of said jet engine and an opposed rear end;spokes extending radially inward from said nozzle, said spokes defining vents;a center-body connected to said spokes and in fluid communication with said vents, said center body being coaxially aligned with said jet engine and comprising a closed front end and an open rear end; anda coupling member removably connected to at least one of a fuselage and said jet engine of said aircraft, said coupling member positions said front end of said nozzle relative to said rear end of said jet engine, wherein:said exhaust streams exiting from said rear end of said jet engine enter said front end of said nozzle, pass through said nozzle, and exit said rear end of said nozzle,an open area between said front end of said nozzle and said rear end of said jet engine entrains a first ambient airflow passing through said nozzle and exiting said rear end of said nozzle proximate a periphery of said nozzle surrounding said exhaust streams and mixing with said exhaust streams, andsaid vents entrain a second ambient airflow passing through said center-body and exiting said rear end of said nozzle proximate a center of said nozzle surrounded by said exhaust streams and mixing with said exhaust streams. 13. The aircraft of claim 12, wherein said spokes comprise three equally spaced apart spokes. 14. The aircraft of claim 12, wherein said nozzle further comprises a wall structure extending circumferentially around a center axis of said nozzle, and wherein said vents define ambient airflow inlets through said wall structure to entrain said second ambient airflow. 15. The aircraft of claim 12, wherein said center-body further comprises lobes extending radially outward proximate said open rear end of said center-body, said lobes directing said second ambient airflow toward said periphery of said nozzle. 16. The aircraft of claim 12, wherein said rear end of said jet engine comprises a diameter and said front end of said nozzle comprises a diameter, and wherein said diameter of said front end of said nozzle is greater than said diameter of said rear end of said jet engine defining said open area between said front end of said nozzle and said rear end of said jet engine configured to entrain said first ambient airflow. 17. The aircraft of claim 16, wherein said rear end of said jet engine is partially received within said front end of said nozzle. 18. The aircraft of claim 12, wherein said jet engine is a first jet engine of said aircraft and said nozzle is a first nozzle of said jet noise suppressor, wherein said aircraft further comprises a second jet engine disposed beside said first jet engine and said jet noise suppressor further comprises a second nozzle, and wherein said first nozzle and said second nozzle are respectively coaxially aligned with said first jet engine and said second jet engine. 19. A method for suppressing jet noise, said method comprising: providing a jet engine comprising a center axis and a rear end;providing a jet noise suppressor comprising: a nozzle coaxially aligned with said jet engine, said nozzle comprising a front end positioned relative to said rear end of said jet engine and an opposed rear end;spokes, each spoke comprising a first end connected to said nozzle and a second end extending radially inward from said nozzle, said spokes defining vents; anda center-body connected to said second ends of said spokes and in fluid communication with said vents, said center body being coaxially aligned with said jet engine and comprising a closed front end and an open rear end;generating exhaust streams from said rear end of said jet engine;entraining said exhaust streams through said front end of said nozzle;passing said exhaust streams through said nozzle;entraining a first ambient airflow through an open area defined between said front end of said nozzle and said rear end of said jet engine, said open area being upstream of said vents with respect to said first ambient airflow;passing said first ambient airflow through said nozzle surrounding said exhaust streams;entraining a second ambient airflow through said vents;passing said second ambient airflow through said center-body surrounded by said exhaust streams;mixing said first ambient airflow with said exhaust streams proximate a periphery of said nozzle; andmixing said second ambient airflow with said exhaust streams proximate a center of said nozzle. 20. The method of claim 19, further comprising directing said second ambient airflow toward said periphery of said nozzle.
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이 특허에 인용된 특허 (2)
Johnson Joseph M. (Bothell WA) Thornock Russell L. (Seattle WA), Fixed geometry controlled entrainment ventilated convergent nozzle and method.
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