Flow Measurements of Methane-Fueled Rotating Detonation Combustion
- Dept. Mechanical Engineering, University of Alabama; University of Alabama
- Dept. Mechanical Engineering, University of Alabama
- Dept. of Mechanical Engineering, University of Alabama
- Chief Engineering, Combustion Devices, Aerojet Rocketdyne, Inc.
Time-resolved particle image velocimetry (PIV) is applied to the flow field at the immediate exit of a rotating detonation combustor (RDC) operating on methane fuel and oxygen-enriched air. The detailed experimental results, which allow for the quantification of the periodic flow field, are believed to be the first such measurements acquired for a RDC. A thorough understanding of the velocity flow field exiting the combustor is important to develop future rotating detonation engine (RDE) design, as well as to successfully implement the flow conditioning devices to power generating turbine hardware located downstream. In this study, multiple PIV tests were conducted and a test case with over 16,000 consecutive image pairs acquired at a PIV framing rate of 30 kHz is analyzed in detail, and is supplemented with another test case to verify the repeatability of the measurements. Results are discretized into a two-dimensional flow field to reveal the significant insights to characterize the cyclical velocity fluctuations. While the flow field is primarily axial, a significant circumferential velocity component is also present. Key attributes of the velocity flow field are observed to be repeated from cycle-to-cycle. The codependency of the fluctuations in axial and circumferential velocity components are investigated, as is the relationship between velocity magnitude and flow orientation. At discrete measurement locations, the Fourier analysis of PIV data is used to reconstruct the cyclical variation of velocity components with respect to the phase angle.
- Research Organization:
- Aerojet Rocketdyne, Inc.
- Sponsoring Organization:
- USDOE Office of Fossil Energy (FE)
- DOE Contract Number:
- FE0023983
- OSTI ID:
- 1817686
- Report Number(s):
- DOE-AR-3983-2; ASME Paper GT 2019-91776
- Country of Publication:
- United States
- Language:
- English
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