Previous research into the flame-vortex dynamics of bluff-body stabilized flames has helped to verify the characteristic flame-flow field and identify the effects of turbulence and pressure gradient tailoring. Such work has indicated that increases in a favorable pressure gradient will both increase the material acceleration of the flow and increase the total magnitude of vorticity seen in domain. This result is specifically tied to the increased baroclinicity of the flow. In addition, it has been shown that as the turbulence level of an incoming flow is increased, the vortex stretching transport term will come to dominate the flow dynamics. This results in the flow beginning to resemble the characteristics of a nonreacting case. In more specific terms, Bénard von Kármán vortex shedding, which is usually suppressed due to combustive heat release, will begin to reappear in the domain. To further cement and verify these conclusions, six experimental test cases were carried out to study the flame-vortex dynamics of a stoichiometric propane-air flame stabilized on a ballistic-type bluff body. Particle imaging velocimetry data was recorded using an optically accessible combustion facility. Velocity vector fields were derived using PIVLab software and further analyzed using both Eulerian and Lagrangian analysis methods. The results and analysis have been plotted and included within the following document.
Bachelor Science in Aerospace Engineering (B.S.A.E.)
College of Engineering and Computer Science
Mechanical and Aerospace Engineering
Length of Campus-only Access
Crimmins, Chandler W., "Flame Vortex Dynamics in a Model Ramjet Combustor" (2020). Honors Undergraduate Theses. 692.