Upstream radiation from supersonic buried-nozzle jets via scattering at the shroud edge

Arnab Samanta, Jonathan B. Freund

Research output: Chapter in Book/Report/Conference proceedingConference contribution


We investigate a scattering mechanism of upstream and sideline radiation from supersonic buried-nozzle jets, which for some conditions is comparable to the well-known, dominant downstream radiation from the Mach waves of such jets. In our buried-nozzle configuration, where the inner nozzle is buried within an outer nozzle-like shroud, the core inner nozzle jet is supersonic while the coflows are subsonic, with co-axial shear layers modeled as vortex sheets separating the respective jets. The mechanisms include incident perturbations in the form of tonal and multimodal shroud acoustic modes to scatter at the shroud edge and radiate sound waves. Depending upon the mix of acoustic modes in the incident perturbation, this radiation is shown to have the potential to generate a strong upstream component, comparable to the aft-angled Mach radiation.

Original languageEnglish (US)
Title of host publication21st AIAA/CEAS Aeroacoustics Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624103674
StatePublished - 2016
Event21st AIAA/CEAS Aeroacoustics Conference, 2015 - Dallas, United States
Duration: Jun 22 2015Jun 26 2015

Publication series

Name21st AIAA/CEAS Aeroacoustics Conference


Other21st AIAA/CEAS Aeroacoustics Conference, 2015
Country/TerritoryUnited States

ASJC Scopus subject areas

  • Aerospace Engineering
  • Electrical and Electronic Engineering


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