Low-dimensional modeling of a mach 0.6 axisymmetric jet

Patrick R. Shea, Zachary P. Berger, Matthew G. Berry, Mark N. Glauser, Sivaram Gogineni

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


This work looks to compare low-dimensional models of a Mach 0.6 axisymmetric jet taken from two independent velocity field data sets. The first is a large window PIV data set acquired at 4 Hz, and the second data set was acquired using time-resolved PIV sampled at 10 kHz. Both data sets are analyzed using the snapshot proper orthogonal decomposition technique to develop a better understanding of the most energetic structures in the ow field. From the large window PIV, the most energetic flow structures are seen to exist downstream of the potential core collapse and lower energy structures are seen to exist closer to the nozzle exit. Performing the same analysis on the time-resolved data set provides insight into a specfic region of the flow field, but windowing effects are apparent when compared to the large window results. The advantage of using the time-resolved data set is that a time-resolved, low-dimensional model can be developed. Overall, each data set has strengths and weaknesses and the results of this work provides insight into how each of the data sets can be used to gain a better understanding of the high-speed jet flow field.

Original languageEnglish (US)
Title of host publication52nd Aerospace Sciences Meeting
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Electronic)9781624102561
StatePublished - Jan 1 2014
Event52nd Aerospace Sciences Meeting 2014 - National Harbor, United States
Duration: Jan 13 2014Jan 17 2014

Publication series

Name52nd Aerospace Sciences Meeting


Other52nd Aerospace Sciences Meeting 2014
Country/TerritoryUnited States
CityNational Harbor

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering


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