A preliminary report on the use of the wide angle diffuser in ground mufflers of the type used for silencing jet aircraft
Date published
1955-05
Free to read from
Authors
Supervisor/s
Journal Title
Journal ISSN
Volume Title
Publisher
College of Aeronautics
Department
Type
Report
ISSN
Format
Citation
Abstract
Experiments with a model wide angle diffuser, in combination with suitable gauze resistances, fitted to the eLsci.t of a high velocity cold jet show that reductions in total noise level of greater than 30 db. can be achieved; the spectrum being flat. It is shown that the wide angle diffuser when fitted to the tail pipe of p. jet engine as a ground muffler need. not affect the characteristics of the engine during 'run up', Applications of this type of muffler to the silencing of jet engines during 'run .up', jet test beds and exhaust silencing of internal combustion engines are briefly discussed.