Time-Resolved PIV Diagnostics to Measure Flow Field Exiting Methane-Fueled Rotating Detonation Combustor
- University of Alabama; University of Alabama
- University of Alabama
- Aerojet Rocketdyne, Sacramento, CA (United States)
Time-resolved particle image velocimetry (TR-PIV) is applied to measure the flow field at the immediate exit of a rotating detonation combustor (RDC) operating on methane fuel and oxygen-enriched air, and configured with a back-pressure choke-plate. The challenges inherent to obtaining temporally consistent and spatially-well distributed seeded flow in a highly-periodic, supersonic, reacting flow field are discussed. Likewise, various measures taken to accurately implement the diagnostic and yield analytical results are detailed. The discussion includes laser optics configuration to maximize laser intensity in the region of interest, and consideration of seeder design and various seed materials and sizes to yield optimized results. Results acquired at 50 kHz PIV acquisition rate are presented to show the flow-field in two-dimensions: axial and circumferential velocity components. Results show that while the flow is primarily axial, a significant circumferential velocity component is also present. The flow oscillates in both directions with the passing of an oblique-shock structure in the PIV region of interest. Recommendations to improve the consistency and precision of the system for future studies are noted.
- Research Organization:
- Aerojet Rocketdyne, Inc.
- Sponsoring Organization:
- USDOE Office of Fossil Energy (FE)
- DOE Contract Number:
- FE0023983
- OSTI ID:
- 1817751
- Report Number(s):
- DOE-AR-3983-15
- Country of Publication:
- United States
- Language:
- English
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