SST Technology Follow-On Program-Phase II. Noise Suppressor/Nozzle Development. Volume III. Noise Technology-Backup Data Report.

摘要

Jet noise suppression technology was studied in this program and reported in Volume II of this document. The data base for the technology studies consisted of static far field noise signatures and jet noise source location measurements for a systematic set of multitube nozzles,with and without ejectors. Acoustic results were complemented by flow profile data to better understand the noise generation and suppression mechanisms. A representative set of test configurations were chosen for which the basic data has been compiled in this report in a standardized format to be readily available to those researchers who may desire to study the data behind the discussion in Volume II. Because of limitations of space not all of the available data could be included. The data presented in this report consists of sound power spectra,sound pressure spectra,directivity patterns,extrapolated perceived noise level characteristics,jet noise source location data and jet flow profiles. (Author)