Network dynamics and suppression of spray combustion instability in a backward-facing step combustor
Phys. Rev. Applied 24, 014002 – Published 1 July, 2025
DOI: https://doi.org/10.1103/zhkg-c3kh
Abstract
We numerically study the network dynamics and suppression of spray combustion instability in a backward-facing step combustor from the perspective of a complex network. We observe the appearance, disappearance, and reappearance of a scale-free topology in a turbulence network. A scale-free topology appears when a large-scale organized vortex is formed, whereas it disappears upon the collapse of the organized vortex. A spatially irregular retention of primary hubs occurs in the turbulence network, which is closely associated with the collapse motion of a large-scale organized vortex. Spray combustion instability is significantly suppressed by placing an obstacle at the location where connector communities are mostly formed in the turbulence network.
