DMD-based Superresolution Measurement of a Supersonic Jet using Dual Planar PIV and Acoustic Data
Abstract
The present study proposes a framework of the superresolution measurement based on the dynamic mode decomposition (DMD) with the Kalman filter and Rauch–Tung–Striebel smoother. The dual-planar particle image velocimetry (PIV) systems were constructed to acquire the paired velocity fields of a Mach 1.1 supersonic jet. The acoustic measurement was simultaneously performed, and the velocity and acoustic data are used for the superresolution. Although the dual PIV system measures the basic characteristics of the velocity fields, all the DMD modes calculated by the exact DMD are decay modes due to the measurement noise. The superresolved velocity field shows smooth convection of the large-scale structures at the downstream side. Therefore, the proposed method is effective to reconstruct the entire flow fluctuation because the DMD modes express the linear dynamical system of the velocity fields.
Copyright and License
© 2022 by Yuta Ozawa/Tohoku University. Published by the American Institute of Aeronautics and Astronautics, Inc., with permission.
Additional details
- Eprint ID
- 115157
- Resolver ID
- CaltechAUTHORS:20220614-222392000
- Created
-
2022-06-14Created from EPrint's datestamp field
- Updated
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2022-06-14Created from EPrint's last_modified field
- Other Numbering System Name
- AIAA Paper
- Other Numbering System Identifier
- 2022-3065