複雑ネットワーク理論による燃焼不安定の流体力学的構造の解明

抄録

We have characterized the dynamic behavior of the flow velocity field during combustion noise in a swirl-stabilized-type turbulent confined combustor from the viewpoints of statistical complexity and complex-network theory. The multiscale complexity-entropy causality plane clearly shows the possible presence of two dynamics during combustion noise: stochastic dynamics and noisy chaos, in the injector rim region and the shear layer region between outer recirculation region in the dump plate and a vortex breakdown bubble away from the centerbody. The noisy chaotic dynamics is associated with the irregular appearance of the primary hub in the downstream region, which is clearly verified by the turbulence network.