INVESTIGATION OF NOISE FROM FULL-SCALE HIGH BYPASS ENGINE AND BLOWN FLAP SYSTEM NASA - Lewis Research Center

Format:

Conference/Event

Author/Creator:

Jones, W. L., author.

Conference Name:

National Air Transportation Meeting (1974-04-30 : Dallas, Texas, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1974

Summary:

A summary is presented of an acoustic test program for investigating engine noise suppression and jet/flap interaction noise associated with an EBF STOL powered lift system. A highly suppressed TF-34 engine and EBF wing were used in the investigation. The engine was suppressed 21 PndB to a level of 94 PndB. An UTW powered lift system was tested with conventional, mixer, and decayer-type nozzles. The configuration with velocity decayer nozzle and acoustically treated shroud had the lowest noise (98 PndB). An OTW configuration with non-decayer nozzle was about 10 dB quieter than the corresponding UTW system. UTW and OTW noise data are compared with scale model correlations

Notes:

Vendor supplied data

Publisher Number:

740467

Access Restriction:

Restricted for use by site license