Simultaneous planar piv and sdic measurements of an axisymmetric jet flowing across a compliant surface

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


The interaction of an underexpanded jet and a nearby adjacent compliant surface is considered in an effort to gain insight into the relevant fluid-structure interaction. High-quality simultaneous flowfield and surface-deflection data were obtained in this high-Reynolds number flow using non-intrusive, fullfield, optical diagnostics (planar particle image velocimetry and stereo/3D digital image correlation, respectively). Both experimental setups were rigorously validated in terms of their measurement resolution and accuracy, both individually, and in a combined manner. The fullfield surface deflection data indicate that the surface has a predominantly quasi-static response characterized by a ‘standing-wave’ type contour along the jet axis. A large jetward deflection, on the order of 10 plate thicknesses, was observed near the first shock cell region, which is consistent with previously obtained rigid-surface case surface pressure measurements. The compliant-surface flowfield was analyzed and compared to the rigid-surface case results in key regions: the initial expansion region, through the shock/boundary-layer interaction (SBLI), the SBLI separation region, the shock cell structure of the remainder of the jet plume, the near-wall boundary layer, and the farfield conditions. Notable differences were observed before, within, and after the SBLI region, as well as within the boundary layer, and in the shock-cell structure.

Original languageEnglish (US)
Title of host publicationAIAA SciTech Forum - 55th AIAA Aerospace Sciences Meeting
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Electronic)9781624104473
StatePublished - 2017
Event55th AIAA Aerospace Sciences Meeting - Grapevine, United States
Duration: Jan 9 2017Jan 13 2017

Publication series

NameAIAA SciTech Forum - 55th AIAA Aerospace Sciences Meeting


Other55th AIAA Aerospace Sciences Meeting
Country/TerritoryUnited States

ASJC Scopus subject areas

  • Aerospace Engineering


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