Chemically reacting transverse plume

The flame length of a plume in incompressible cross-flow is analyzed and the results are compared with those obtained in a chemically reacting water tunnel experiment. It is argued that the axial vortex pair in the flow arises from the plume momentum normal to the free stream, the momentum flux being equivalent to the impulse from the buoyant force.

Figure 1

Flow geometry.

Figure 2

Flow geometry.

Figure 3

Flame chord length for varying equivalence ratio.

Figure 4

Downstream flame length for different $\varphi$.

Figure 5

Normalized downstream flame length.

Figure 6

Flow visualization of the Fric and Roshko vortices.