Conventional profile coaxial jet noise prediction

Abstract

A semiempirical model for predicting the noise generated by conventional velocity-profile jets exhausting from coaxial nozzles is presented and compared with small-scale static data. The present method is an updated version of that part of the original NASA Aircraft Noise Prediction Program (1974) relating to coaxial jet noise. The new procedure is more theoretically based and has also been improved by some empirical adjustments.