Numerical Aspects of Noise-Induced Dynamics in Continuous Combustion Systems

Combustion systems are exposed to intrinsic and extrinsic noise arising from various sources. Contrasting the conventional viewpoint of treating noise as signal contamination, the stochastic effects on combustion systems, namely the noise-induced dynamics (NID), are attracting much attention. This is because noise can alter the system's dynamics from the nonlinear interactions with the reacting flow field. Because such an alteration in combustion dynamics cannot be analyzed in a traditional deterministic framework, many studies have been conducted to quantitatively and qualitatively analyze the noise-driven behaviors in combustion systems. In this paper, review the various types of noise-induced dynamics in continuous combustion systems along with the low-order numerical simulations and summarize how such dynamics are used to analyze the physical nature of the system. Specifically, we investigate the ▲phenomenological aspects of the NID in combustion systems, ▲NID used for the diagnosis of such systems, and ▲system identification of combustion systems using the NID.