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Title: A model combustor for studying a reacting jet in an oscillating crossflow

This paper discusses a novel model combustion experiment that was built for studying the structure and dynamics of a reacting jet in an unsteady crossflow. A natural-gas-fired dump combustor is used to generate and sustain an acoustically oscillating vitiated flow that serves as the crossflow for transverse jet injection. Unlike most other techniques that are limited in operating pressure or acoustic amplitude, this method of generating an unsteady flow field is demonstrated at a pressure of 10 atm with peak-to-peak oscillation amplitudes approaching 20% of the mean pressure. An optically accessible test section designed for these conditions provides access for advanced laser and optical diagnostic measurements. Detailed measurements provide insight into the complex acoustic-hydrodynamic-combustion coupling processes and offer high-quality, high-resolution validation data for numerical simulations. Careful instrumentation port design considerations for the higher amplitude acoustics are detailed. As a whole, this paper focuses on select representative segments of the experiment operational space that highlight our strategy of providing an oscillatory flowfield. This includes presenting the acoustic operational space such as acoustic amplitudes, frequencies, and mode shapes. Select imaging results are then reported to support our strategies capability to produce high-fidelity measurements.
Authors:
 [1] ;  [1] ;  [2] ;  [1] ;  [3] ; ORCiD logo [1]
  1. Purdue Univ., West Lafayette, IN (United States). School of Aeronautics and Astronautics
  2. Siemens Energy, Inc., Orlando, FL (United States)
  3. Purdue Univ., West Lafayette, IN (United States). School of Mechanical Engineering
Publication Date:
Grant/Contract Number:
FE0007099
Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 88; Journal Issue: 6; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Research Org:
Purdue Univ., West Lafayette, IN (United States); Siemens Energy, Inc., Orlando, FL (United States)
Sponsoring Org:
USDOE Office of Fossil Energy (FE); Siemens Energy, Inc. (United States)
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; sound pressure; flames; high pressure; chemically reactive flows; particle jets; flow instabilities; fluid jets; nozzle jets; acoustic resonance; combustion
OSTI Identifier:
1466255
Alternate Identifier(s):
OSTI ID: 1366553