Analysis of the combustion instability of a model gas turbine combustor by the transfer matrix method

作者：Cha Dong Jin^*; Kim Jay H; Joo Yong Jin

来源：Journal of Mechanical Science and Technology, 2009, 23(6): 1602-1612.

DOI：10.1007/s12206-009-0427-z

• Combustion instability
• Model gas turbine combustor
• Normal mode method
• Stability margin
• Thermoacoustics
• Transfer matrix method

Combustion instability is a major issue in design of gas turbine combustors for efficient operation with low emissions. A transfer matrix-based approach is developed in this work for the stability analysis of gas turbine combustors. By viewing the combustor cavity as a one-dimensional acoustic system with a side branch, the heat source located inside the cavity can be described as the input to the system. The combustion process is modeled as a closed-loop feedback system, which enables utilization of well-established classic control theories for the stability analysis. Due to the inherent advantage of the transfer matrix method and control system representation, modeling and analysis of the system becomes a straightforward task even for a combustor of the complex geometry. The approach is applied to the stability analysis of a simple combustion system to demonstrate its validity and effectiveness.

• 出版日期2009-6