Sound Transmission through Ducts.
Abstract
This report covers analytic studies describing the propagation of sound waves in acoustically lined ducts. These ducts are typically found in quieted high bypass turbine engine nacelles. Fortran IV computer programs were written for a CDC 6600 computer to predict maximum exponential attenuation of a least naturally attenuated mode in rectangular, annular, and cylindrical ducts either uniform or sheared flow. Additional programs were written to design optimum perforated plate liners. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1978
- Accession Number
- ADA057803
Entities
People
- Eugene P. Hoffman
- John J. Schauer
- Robert W. Guyton
Organizations
- University of Dayton