@inproceedings{570ce710ee834d50aacd059bbe4af19e,
title = "The far-field acoustics of supersonic single and dual impinging jets with correlations to near-field noise",
abstract = "The paper reports on near and far-field acoustic measurements of single and dual supersonic exhaust jets impinging normal to a simulated ground plane. Far-field measurements focus on investigating the differences in noise with standoff distance, total temperature ratio, and the operation of a single supersonic jet compared to a forward sonic jet and rear supersonic jet. Overall sound pressure level (OASPL) directivity shows peak noise levels directed towards the rear arc. Near-field spectra for convectively supersonic jets appear nearly flat over a wide range of frequencies as acoustic pressure fluctuations are of similar magnitude to hydrodynamic pressure fluctuations. Unsteady surface pressure measurements at the impingement points of the forward and rear jets show a peak in rms pressure near a standoff distance of 6-8 nozzle diameters. Flow visualization show large scale structures impinging on the ground plane with strong acoustic waves radiating from the point of impact. Surface pressure and the near-field microphone signals are cross-correlated with far-field microphone signals to investigate the propagation paths of noise generated by large scale structures to the far-field.",
author = "Hromisin, {Scott M.} and Myers, {Leighton M.} and McLaughlin, {Dennis K.} and Morris, {Philip J.}",
note = "Funding Information: This work was partially supported by the Office of Naval Research under grant number N000141410830 with Dr. Judah Milgram serving as Grant monitor. Authors Scott Hromisin and the recently graduated Dr. Leighton Myers would like to thank the DoD SMART Scholarship Program for the support of their graduate research during their tenure at Penn State with Mr. Terence Ghee and Dr. David Findlay serving at program mentors. Finally the authors wish to acknowledge the significant contributions by colleagues in the Aerospace Department J.D. Miller, and the recently graduated Nicholas Rudenko and Dr. Russell Powers for their support and insightful discussions on this project Publisher Copyright: {\textcopyright} 2017 by Scott M. Hromisin, Leighton M. Myers, Dennis K. McLaughlin, Philip J. Morris. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.; 55th AIAA Aerospace Sciences Meeting ; Conference date: 09-01-2017 Through 13-01-2017",
year = "2017",
doi = "10.2514/6.2017-0229",
language = "English (US)",
series = "AIAA SciTech Forum - 55th AIAA Aerospace Sciences Meeting",
publisher = "American Institute of Aeronautics and Astronautics Inc.",
booktitle = "AIAA SciTech Forum - 55th AIAA Aerospace Sciences Meeting",
}