A model combustor for studying a reacting jet in an oscillating crossflow
Christopher A Fugger1, Rohan M Gejji1, J Enrique Portillo2
1School of Aeronautics and Astronautics, Purdue University, West Lafayette, Indiana 47907, USA.
The Review of Scientific Instruments
|July 3, 2017
Summary
A novel combustion experiment simulates reacting jets in unsteady crossflows using an acoustically oscillating flow. This high-pressure system provides crucial data for understanding combustion dynamics and validating simulations.
Area of Science:
- Combustion Science
- Fluid Dynamics
- Acoustics
Background:
- Studying reacting jets in unsteady crossflows is crucial for understanding complex combustion phenomena.
- Existing experimental methods often have limitations in operating pressure or acoustic amplitude.
Purpose of the Study:
- To present a novel model combustion experiment for investigating reacting jets in unsteady crossflows.
- To demonstrate a method for generating high-pressure, acoustically oscillating flows.
- To provide high-quality data for validating numerical simulations.
Main Methods:
- Utilized a natural-gas-fired dump combustor to generate an acoustically oscillating vitiated crossflow.
- Operated the experiment at 10 atm with significant acoustic oscillation amplitudes (20% peak-to-peak).
- Employed an optically accessible test section for advanced laser and optical diagnostics.
Main Results:
- Successfully generated and sustained an acoustically oscillating flow field at high pressure.
- Obtained detailed measurements offering insight into acoustic-hydrodynamic-combustion coupling.
- Presented representative operational space data, including acoustic amplitudes, frequencies, and mode shapes.
Conclusions:
- The developed experimental setup effectively studies reacting jets in unsteady crossflows.
- The high-fidelity measurements provide valuable validation data for computational fluid dynamics (CFD) models.
- The approach overcomes limitations of previous techniques regarding pressure and acoustic amplitude.
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