Extracting near-field structures related to noise production in high speed jets

Pinqing Kan, Christopher J. Ruscher, Jacques Lewalle, Mark N. Glauser, Sivaram Gogineni, Barry V. Kiel

Research output: Chapter in Book/Entry/PoemConference contribution

14 Scopus citations


The three-dimensional interactions of shock structures and multiple shear layers in a two-stream exhaust produced by a three-stream engine are documented. This paper focuses on the near-field pressure generated by Large Eddy Simulation (LES) and is based on pressure in two perpendicular sections and four transverse sections. After a basic documentation of the sound pressure level (SPL) and power spectra, we identify hot-spots (regions of large pressure fluctuations) as structures participating in the dynamics of the complex 3D flow. Cross-correlations between the hot spots and the entire pressure field reveals the propagation of fluctuations and possible interactions and acoustic waves in the jet. The interactions between the shock structures and shear layers are also studied in specific frequency bands, which enable us to map out some of the communication pathways between the flow structures.

Original languageEnglish (US)
Title of host publication54th AIAA Aerospace Sciences Meeting
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624103933
StatePublished - 2016
Event54th AIAA Aerospace Sciences Meeting, 2016 - San Diego, United States
Duration: Jan 4 2016Jan 8 2016

Publication series

Name54th AIAA Aerospace Sciences Meeting


Other54th AIAA Aerospace Sciences Meeting, 2016
Country/TerritoryUnited States
CitySan Diego

ASJC Scopus subject areas

  • Aerospace Engineering


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