@inproceedings{a7000e2fb48b485e84278ff5b0366b4b,
title = "Extracting near-field structures related to noise production in high speed jets",
abstract = "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.",
author = "Pinqing Kan and Ruscher, {Christopher J.} and Jacques Lewalle and Glauser, {Mark N.} and Sivaram Gogineni and Kiel, {Barry V.}",
note = "Funding Information: This work would not have been possible without many sponsors and access to computational resources. The LES data was produced using the National Research Laboratory JENRE code and the authors are thankful for all of their advice on the computational work. The simulations shown in this paper were performed on Garnet, one of the DoD supercomputing resource centers operated by the high performance computing modernization program. Pinqing Kan was supported by Syracuse University. Christopher Ruscher was supported by a SBIR Phase II and Phase I funding with AFRL Turbine Engine Division. Jacques Lewalle was supported in part by the SBIR Phase I funding, in part by a AFOSR grant (number FA9550-15-1-0435) under the direction of Dr. R. Ponnappan. We also greatly benefited from the interactions with the Glauser Group at Syracuse University, and the members of the Air Force noise team. Publisher Copyright: {\textcopyright} 2016, American Institute of Aeronautics and Astronautics Inc, AIAA. All Rights Reserved.; 54th AIAA Aerospace Sciences Meeting, 2016 ; Conference date: 04-01-2016 Through 08-01-2016",
year = "2016",
doi = "10.2514/6.2016-0004",
language = "English (US)",
isbn = "9781624103933",
series = "54th AIAA Aerospace Sciences Meeting",
publisher = "American Institute of Aeronautics and Astronautics Inc, AIAA",
booktitle = "54th AIAA Aerospace Sciences Meeting",
}