Analysis of fluid insert noise reduction method with PIV

Jessica Morgan, Christopher Shoemaker, Dennis K. McLaughlin, Philip J. Morris, Zachary P. Berger

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


The fluid flow field of a supersonic jet from a converging-diverging nozzle with fluid inserts is studied in an experimental investigation. The Pennsylvania State University has developed a noise reduction method that uses corrugations or rows of fluid inserts in the diverging section of the nozzle. Far-field pressure measurements have successfully shown up to a 5 dB noise reduction in the peak noise direction. The current study utilizes Particle Image Velocimetry (PIV) to observe the near-field velocities directly at the exit plane of the nozzle. The flow field is analyzed and compared for various fluid insert configurations. The velocity field demonstrates the effect of the fluid inserts on the core flow of the jet. It is observed that the fluid inserts increase the width of the shear layer. A filtered Proper orthogonal decomposition (POD) method is discussed in the analysis of the flow field. The flow field results are compared to far-field measurements to better understand the mechanisms that produce noise reduction.

Original languageEnglish (US)
Title of host publication2018 AIAA/CEAS Aeroacoustics Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624105609
StatePublished - 2018
EventAIAA/CEAS Aeroacoustics Conference, 2018 - Atlanta, United States
Duration: Jun 25 2018Jun 29 2018

Publication series

Name2018 AIAA/CEAS Aeroacoustics Conference


OtherAIAA/CEAS Aeroacoustics Conference, 2018
Country/TerritoryUnited States

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Aerospace Engineering


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