Noise Considerations in the Design of Advanced Subsonic Transport Turbofan Engines General Electric Company

Format:

Conference/Event

Author/Creator:

Neitzel, R. E., author.

Conference Name:

National Aeronautic and Space Engineering and Manufacturing Meeting (1970-10-05 : Los Angeles, California, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1970

Summary:

The problems and choices in the design of an advanced subsonic transport turbofan for reduced noise and improved aircraft performance are examined in this paper. The effects of bypass ratio, fan pressure ratio, and fan tip speed on jet noise, fan noise, and acoustic treatment suppression are described. The results do not indicate a clear optimum bypass ratio considering the effects upon installed engine performance and weight as well as acoustic performance. Low fan tip speed designs with the associated high aerodynamic loading are compared to high tip speed low loading designs. Other factors affecting noise such as the installation and other noise sources are discussed. The long duct installation is indicated to have potential advantages over the short duct separate flow installation. The problem of assuring that growth models of an engine also have low noise is discussed

Notes:

Vendor supplied data

Publisher Number:

700807

Access Restriction:

Restricted for use by site license