Facilities and Instrumentation for Aircraft Engine Noise Studies

Abstract

This paper describes the special facilities and instrumentation developed and used in the study of aircraft turbine-engine noise at Pratt & Whitney Aircraft. Studies of jet-exhaust noise and compressor-blade noise have required extensive use of the experimental method to obtain basic understanding and to provide design data. Both model-scale and full-scale facilities are described, as well as instrumentation systems for recording and analyzing the acoustic data.