公开(公告)号：US20240092492A1

公开(公告)日：2024-03-21

申请号：US18348649

申请日：2023-07-07

Applicant: General Electric Company

Inventor： Narayanan PAYYOOR ,  Bhaskar Nanda MONDAL ,  Arda UNSAL

IPC: B64D27/10 ,  F02C3/04 ,  F02C7/06 ,  F02C7/36

CPC classification number: B64D27/10 ,  F02C3/04 ,  F02C7/06 ,  F02C7/36 ,  F05D2240/60 ,  F05D2260/40 ,  F05D2260/96 ,  F05D2300/211 ,  F05D2300/2112 ,  F05D2300/2261 ,  F05D2300/6033 ,  F05D2300/614

Abstract: A turbomachine engine including a high-pressure compressor, a high-pressure turbine, a combustion chamber in flow communication with the high-pressure compressor and the high-pressure turbine, and a power turbine in flow communication with the high-pressure turbine. At least one of the high-pressure compressor, the high-pressure turbine, and the power turbine comprises a ceramic matrix composite (CMC) material. The turbomachine engine includes a low-pressure shaft coupled to the power turbine and characterized by a midshaft rating (MSR) between two hundred (ft/sec)1/2 and three hundred (ft/sec)1/2. The low-pressure shaft has a redline speed between fifty and two hundred fifty feet per second (ft/sec). The turbomachine engine is configured to operate up to the redline speed without passing through a critical speed associated with a first-order bending mode of the low-pressure shaft.