Abstract
Combustion instability has become the primary technical challenge in the development of low-emission combustors for aero and land-based gas-turbine engines, since it has the capacity to cause catastrophic damage to the combustion chamber and other engine components. Despite a great deal of research regarding this issue over the past several decades, the problem is not yet fully solved, due to the attendant level of complexity. Understanding the driving mechanisms of combustion instabilities under practical conditions and configurations is definitely a critical issue in the development of low-emission jet engines, since a detailed understanding of these mechanisms allows one to consider the means by which to stabilize the combustor. Two recent studies on combustion stability diagnostics at Japan Aerospace Exploration Agency are introduced in this article.
