TY - GEN
T1 - Multi-measurement correlations in the near-field of a complex supersonic jet using time-resolved schlieren imaging
AU - Tenney, Andrew S.
AU - Coleman, Thomas J.
AU - Lewalle, Jacques
AU - Gogineni, Sivaram
N1 - Funding Information:
This work has been funded by AFOSR grant number FA9550-15-1-0435 (program manager Dr. Douglas Smith), Spectral Energies, LLC, and an SBIR grant from AFRL. Partial support was also provided by Syracuse University. Special thanks to TJ Coleman, Andrew Magstadt, and Matthew Berry for all the time spent in the lab getting these data sets, Han Pham for her contributions to its analysis, and my advisors, Dr. Mark Glauser and Dr. Jacques Lewalle.
PY - 2017
Y1 - 2017
N2 - In this study, we aim to characterize the dynamics and visualize the propagation of fluctuations in the near field of a complex multi-stream jet over an aft deck plate. The flow is visualized using time resolved schlieren photography (up to 400,000 frames per second) while pressure on the aft deck plate is simultaneously sampled using Kulite pressure sensors. Time series are constructed using the schlieren photographs and conditioned to reduce the effects of signal drift. The analysis is focused in several regions identified in previous studies as dynamically interesting through their high levels of pressure variance and rich spectral content. Space-Time cross correlations are utilized to visualize propagation of fluctuations from the near field to the far field, and several propagation pathways are identified. This process is repeated for band-pass filtered schlieren signals, and a case is made for the separability of near field dynamics into distinct frequency bands.
AB - In this study, we aim to characterize the dynamics and visualize the propagation of fluctuations in the near field of a complex multi-stream jet over an aft deck plate. The flow is visualized using time resolved schlieren photography (up to 400,000 frames per second) while pressure on the aft deck plate is simultaneously sampled using Kulite pressure sensors. Time series are constructed using the schlieren photographs and conditioned to reduce the effects of signal drift. The analysis is focused in several regions identified in previous studies as dynamically interesting through their high levels of pressure variance and rich spectral content. Space-Time cross correlations are utilized to visualize propagation of fluctuations from the near field to the far field, and several propagation pathways are identified. This process is repeated for band-pass filtered schlieren signals, and a case is made for the separability of near field dynamics into distinct frequency bands.
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M3 - Conference contribution
AN - SCOPUS:85033217883
T3 - 10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017
BT - 10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017
PB - International Symposium on Turbulence and Shear Flow Phenomena, TSFP10
T2 - 10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017
Y2 - 6 July 2017 through 9 July 2017
ER -