Model-Based Optimal Active Control of Liquid-Fueled Combustion Systems

D. Wee, S. Park, T. Yi, A. M. Annaswamy, A. F. Ghoniem

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

Abstract

Advances in modeling combustor are obtained by investigating the shear-flow driven combustion instability. Shear-layer instability produces nonacoustic modes in shear flow. These modes can be predicted and matched to experimental data. These data are combined with a new tool based on the proper orthogonal decomposition (POD) method to yield the reduced-order models of combustion systems. These models shed light on the interactions among hydrodynamics, acoustics, and heat release. A recursive POD (RePOD) algorithm is developed to facilitate a stable online control design by providing suitable updates of the POD modes. Model-based posi-cast controllers produce favorable results as compared to phase-shift controllers using simulation studies on a large-scale combustor model. A theoretical framework for the investigation of shear-flow dynamics is found in modern linear stability analysis in which unstable modes have been characterized as connectivity unstable and absolute unstable.

Original languageEnglish
Title of host publicationCombustion Processes in Propulsion
PublisherElsevier Inc.
Pages201-210
Number of pages10
ISBN (Print)9780123693945
DOIs
StatePublished - 2006

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