Method for Predicting In‐Flight Noise on Jet Aircraft Structure

Simulation of Supersonic Military Aircraft Jet Noise

Background: There is a growing need to reduce significantly the noise generated by high-performance, supersonic military aircraft. The noise generated during takeoff and landing on aircraft carriers has direct impact on shipboard health and safety issues. Also, noise complaints are increasing as communities move closer to military bases or when there are changes due to base closures and realign...

A new method for aircraft noise synthesis

This paper presents a method to synthesize aircraft noise. The method provides designers with a tool for sound quality evaluation with which target sounds for future aircraft design can be developed. Quick and economic evaluations concerning the quality of sounds of different design alternatives or improvements on existing aircraft become possible. The method has the potential to become a cruci...

Parameter Identification for Inflight Detection and Characterization of Aircraft Icing

Simple - source model of military jet aircraft noise 1 , 2

Described is a method for determining a semi-empirical, equivalent simple-source model that accounts for the aeroacoustic sources in the jet plumes of high-performance military aircraft. The characteristics of the equivalent source are guided by previously reported observations of jet noise, including an asymmetric, partially correlated source distribution and known far-field peak directivity a...

Similarity spectra analysis of high-performance jet aircraft noise.

Noise measured in the vicinity of an F-22A Raptor has been compared to similarity spectra found previously to represent mixing noise from large-scale and fine-scale turbulent structures in laboratory-scale jet plumes. Comparisons have been made for three engine conditions using ground-based sideline microphones, which covered a large angular aperture. Even though the nozzle geometry is complex ...