Time-Resolved PIV Measurements of Flow Field at Diffuser Exit Downstream of a Rotating Detonation Combustor

Conference · Mon Aug 19 04:00:00 EDT 2019

OSTI ID:1817738

Depperschmidt, Daniel L. ^[1]; Tobias, Jonathan R. ^[2]; Miller, Robert S. ^[2]; Agrawal, Ajay K. ^[2]

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1. Dept. Mechanical Enginering, University of Alabama; University of Alabama
2. Dept. Mechanical Enginering, University of Alabama

Time-resolved particle image velocimetry at 30 kHz is applied to the exhaust flow field of a RDC system configured with a diffuser geometry and a converging-diverging (CD) nozzle. The RDC is operated with methane fuel and oxygen-enriched air, motivated by power generation applications. The measured flow-field is discretized into axial and non-axial velocity components. Results are shown to characterize the flow-field across a cord length at the exit plane. Instantaneous contours of the two velocity components, and 1D histograms of velocity components, and 2D histograms of total velocity and tilt angle are shown at multiple locations in the flow. Repeatability of the data is evaluated by comparing tests conducted at similar flow rates. Results are presented for a baseline test case, and test cases showing the effect of reactant higher flow rate and CD nozzle geometry. Finally, the results are compared to a previous RDC study without the diffuser to compare the effectiveness of the diffuser and CD nozzle designs in mitigating the flow periodicity at the combustor exit.

• Research Organization: Aerojet Rocketdyne, Inc.
• Sponsoring Organization: USDOE Office of Fossil Energy (FE)
• DOE Contract Number: FE0023983
• OSTI ID: 1817738
• Report Number(s): DOE-AR-3983-7
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
42 ENGINEERING
Pressure gain combustion
rotating detonation
rotating detonation combustion