Supersonic Transport Noise Reduction Technology Summary. Phase I.
Abstract
Studies were performed to conclude and refine elements of work begun under the Supersonic Transport Engine Development Program. Three programs were completed in the area of turbomachinery noise: the screening of proposed materials for high temperature acoustic treatment and the extension of suppression design methods to the flows and temperatures typical of turbine exhaust conditions; investigations of multi-stage compressor tip treatment using multiple circumferential grooves; and the prediction and demonstration of the effects of increased turbine axial spacing on noise generation. Detailed analytical studies were made of data from conic and suppressor-type jets, both cold and hot flows, selected from the GE4/SST program. Correlations of aero/acoustic interrelationships were made, and elements of the noise generation mechanisms showing promise for future advanced concepts were identified. Scaling of small model jet noise data to engine size was established, using scaling techniques and accounting for site differences and the added sources present in engine data. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1972
- Accession Number
- AD0907108
Entities
People
- G. T. Sandusky
- H. W. Hehmann
- P. R. Knott
- W. S. Fisk
Organizations
- General Electric