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公开(公告)号：JPH11247668A
公开(公告)日：1999-09-14
申请号：JP36489998
申请日：1998-12-22
Applicant: UNITED TECHNOLOGIES CORP
Inventor： NIKKANEN JOHN P , SANDAHL STEVEN D , ZYSMAN STEVEN H
Abstract: PROBLEM TO BE SOLVED: To realize excellent engine efficiency and a heat exchanger system by providing an inlet of the heat exchanger system with an inner wall inside in the radial direction of a non-turbulent stream line and disposing an outlet of the heat exchanger system adjacent to the inner wall of a fan duct. SOLUTION: Cooling air always flows from a fan duct partitioned by an inner wall 36 and an outer wall 38 to a heat exchanger 54. The heat exchanger system 52 has an inlet 58 of a low system, and the inlet 58 faces to a fresh air flow. Thus, to minimize the length of the heat exchanger 54, the inlet 58 and the outlet 62 are provided adjacent in the axial direction in the inner wall 36 of the fan duct, whereby even if a disadvantageous static pressure gradient is caused by no turbulence flow in the fan duct between them, cooling air can be let flow through the heat exchanger 54. The inner wall 36 is arranged inside in the radial direction of the inner wall of the fan duct to have exposure ratio of 70% or less, an aspect ratio of 25% or less, and a projection ratio of 10% or less.
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公开(公告)号：JP2003161167A
公开(公告)日：2003-06-06
申请号：JP2002290990
申请日：2002-10-03
Applicant: UNITED TECHNOLOGIES CORP
Inventor： NIKKANEN JOHN P , MIGLIARO EDWARD F , ZYSMAN STEVEN H , AVIS THOMAS B
Abstract: PROBLEM TO BE SOLVED: To provide an upgraded bleed deflector to be used within a gas turbine. SOLUTION: A bleed deflector comprises an inlet portion 22 which receives bleed air from an engine, a perforated top plate 44 through which bleed air is discharged into a fan duct 30, and an aerodynamically shaped strut which enables positioning of the perforated top plate 44 above the inner wall of the fan duct 30, and allows air for mixing to flow in the bottom of the perforated top plate 44. COPYRIGHT: (C)2003,JPO
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公开(公告)号：JPH11247667A
公开(公告)日：1999-09-14
申请号：JP36489898
申请日：1998-12-22
Applicant: UNITED TECHNOLOGIES CORP
Inventor： NIKKANEN JOHN P , SANDAHL STEVEN D , ZYSMAN STEVEN H
Abstract: PROBLEM TO BE SOLVED: To prevent complicated switching of a valve and lowering of efficiency of an engine during operation by letting an operating medium gas continuously flow through a heat exchanger between two points of a fan duct inner wall where a disadvantageous static pressure gradient is caused to be heat-exchanged with cooling air, and returning the high temperature air to an operating medium passage. SOLUTION: During operation, an operating medium gas flows along a primary passage and a secondary passage for the gas. Heat is carried to a cooling medium fluid flowing from various parts along a passage 74 to a heat exchanger 54. The cooling air is continuously passed through the heat exchanger under all operating conditions of an engine to continuously flow from a fan duct 46 through a passage 56. A passage for a heat exchanger system is extended to the heat exchanger through an inlet duct 76, and an inlet 58 including a first pipeline 82 and a second pipeline 84 and further extended through an outlet 64. The passage 56 is not intercepted under all operating conditions. The valve operation is not needed for regulating the flow. Thus, the cooling system is simplified, and in the heat exchange system, complicatedness of a valve and a control means can be prevented.
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公开(公告)号：JPH11229897A
公开(公告)日：1999-08-24
申请号：JP34089098
申请日：1998-12-01
Applicant: UNITED TECHNOLOGIES CORP
Inventor： NIKKANEN JOHN P , SANDAHL STEVEN D , ZYSMAN STEVEN H , DITOMASSO JOHN C
Abstract: PROBLEM TO BE SOLVED: To enable the prevention of damage by foreign matter such as ice without installing complicated valve means. SOLUTION: An outlet/inlet module is disclosed which has both an inlet 58 and an outlet 62 for a heat exchanger system. The heat exchanger system 54 is placed in a cavity portion within a nacelle core chamber and communicates to a fan bypass duct through an inlet duct 76 which slopes down suddenly in a radially inward direction, and an exhaust duct 86. Weight ratio and aerodynamic performance of the system have been improved. A module is comprised of an integrated cast with a lobe shaped mixer 94 at the outlet thereof.
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公开(公告)号：ES2105255T3
公开(公告)日：1997-10-16
申请号：ES93909511
申请日：1993-04-13
Applicant: UNITED TECHNOLOGIES CORP
Inventor： NIKKANEN JOHN P , BUBELLO ROBERT , MAIER GRANT P
Abstract: An anti-icing system for a nacelle of a gas turbine powerplant is disclosed. Various construction details have been developed which provide means to exhaust fluid from an inlet shell cavity and into an external medium. In one embodiment, the exhaust means (62) includes a plurality of aerodynamically shaped vanes (66) disposed within the inlet shell cavity (52) and a plurality of exhaust slots (68) wherein each of the vanes is adjacent one of the exhaust slots. The vanes are adapted to turn a portion of the body of fluid flowing within the inlet shell cavity to a direction substantially normal to the direction of flow of the external medium.
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Patent Agency Ranking
公开(公告)号：DE69816952T2
公开(公告)日：2004-04-08
申请号：DE69816952
申请日：1998-12-22
Applicant: UNITED TECHNOLOGIES CORP
Inventor： NIKKANEN JOHN P , SANDAHL STEVEN D , ZYSMAN STEVEN H
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公开(公告)号：AT183811T
公开(公告)日：1999-09-15
申请号：AT94304591
申请日：1994-06-23
Applicant: NORDAM GROUP INC , UNITED TECHNOLOGIES CORP
Inventor： JANNETTA THOMAS J , NIKKANEN JOHN P
Abstract: A modified exhaust tailpipe especially for use with an aircraft turbofan engine utilizing a noise suppressor. The modified tailpipe is connected to the exhaust duct of the engine. The forward end of the tailpipe is essentially the same diameter as that of the exhaust duct of the engine. The contour of the tailpipe is such that it increases in diameter to form a bulge (31) to increase the flow area for fan gases in the area of a mixer (24) which is supported within the forward end of the tailpipe exhaust system. This improves the operating efficiency of the jet engine.
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公开(公告)号：DE69816952D1
公开(公告)日：2003-09-11
申请号：DE69816952
申请日：1998-12-22
Applicant: UNITED TECHNOLOGIES CORP
Inventor： NIKKANEN JOHN P , SANDAHL STEVEN D , ZYSMAN STEVEN H
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公开(公告)号：DE69816013D1
公开(公告)日：2003-08-07
申请号：DE69816013
申请日：1998-12-22
Applicant: UNITED TECHNOLOGIES CORP
Inventor： NIKKANEN JOHN P , SANDAHL STEVEN D , ZYSMAN STEVEN H , DITOMASSO JOHN C
Abstract: An inlet and outlet module (108) having both an inlet (58) and an outlet (62) for a heat exchanger system (52) is disclosed. Various construction details which improve the stiffness to weight ratio and the aerodynamic smoothness are developed. In one embodiment, the module (108) is formed of a one piece casting having a lobed mixer (94) at the outlet.
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公开(公告)号：DE69204861D1
公开(公告)日：1995-10-26
申请号：DE69204861
申请日：1992-01-29
Applicant: UNITED TECHNOLOGIES CORP
Inventor： KOFF STEVEN G , NIKKANEN JOHN P , MAZZAWY ROBERT S
Abstract: To enhance stall margin without degrading engine performance the case (14) of the fan (10) of a fan-jet engine is treated by incorporating a passageway to remove flow from the main flow stream (A). The location and amount of the low momentum flow relative to the rotor being removed is critical. The flow is removed at a judicious location downstream of the leading edge (32) of the rotor blade (18) and returned at a judicious location upstream of the point of removal. The amount of removed flow must be no greater than 8% of the total flow in the fan rotor. Anti-swirl vanes (38) in the passageway and discreetly sized inlet and outlet passages (34,36) of the passageway return the flow to the main stream at an increased velocity. The intake is so designed that it selectively removes only the weak low momentum flow relative to the rotor and encourages the strong mainstream flow to remain in the main gas stream.
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