Prediction, experiments and optimization of High-Speed jet noise reduction using fluidic inserts

Philip J. Morris, Dennis K. McLaughlin, Russell Powers, Matthew Kapusta

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

16 Scopus citations


This paper describes several components of a study examining noise reduction in high speed heated jets using fluidic inserts. This noise reduction technology is based on the ideas developed by Seiner and his colleagues at NASA Langley Research Center and the University of Mississippi1. That approach was based on the introduction of corrugated seals into the diverging section of a convergent divergent nozzle. These corrugations change the effective area ratio so that the jet operates closer to an on-design condition and reduces broadband shock-associated noise. In addition, the corrugations generate streamwise vorticity that breaks up the large scale structures in the jet and reduces mixing noise. The idea behind fluidic inserts, described by Morris et al.2 is to generate an equivalent effect with low levels of flow injection in the diverging section of the nozzle. This has the considerable advantage that the fluidic inserts can be controlled actively for maximum noise reduction and performance benefits. The present paper describes recent developments in the optimization of the fluidic insert concept. Flow and noise experiments, including the effect of forward flight are described. Numerical simulations are performed to characterize the flow features generated by the fluidic inserts as well as to develop measures of flow characteristics that can be related to the observed noise changes. These measures can be used to develop a cost function in a design optimization procedure.

Original languageEnglish (US)
Title of host publication50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference 2014
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Electronic)9781624103032
StatePublished - 2014
Event50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and exhibit 2014 - Cleveland, United States
Duration: Jul 28 2014Jul 30 2014

Publication series

Name50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference 2014


Other50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and exhibit 2014
Country/TerritoryUnited States

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Aerospace Engineering
  • Control and Systems Engineering
  • Electrical and Electronic Engineering
  • Mechanical Engineering


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