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    HEAT EXCHANGER SYSTEM OF GAS TURBINE ENGINE
    1.
    发明专利
    HEAT EXCHANGER SYSTEM OF GAS TURBINE ENGINE 失效

    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

    IPC: F02C7/12 ,  F02C7/14 ,  F28D21/00 ,  F28F9/04

    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.

    COOLING METHOD FOR GAS TURBINE ENGINE
    2.
    发明专利
    COOLING METHOD FOR GAS TURBINE ENGINE 失效

    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

    IPC: F02C7/12 ,  F02C7/14

    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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