کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7163767 1462873 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of heat source on transient energy growth analysis of a thermoacoustic system
ترجمه فارسی عنوان
اثر منبع گرما در تحلیل رشد انرژی گذرا یک سیستم گرماسوختی
کلمات کلیدی
نوسان حرارتی رشد انرژی گذرا، بی ثباتی احتراق شعله پیش ساخته غیر عادی، تبدیل حرارت به صدا،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
چکیده انگلیسی
Transient growth of disturbances in a non-normal combustion system could trigger thermoacoustic instability. In this work, the effect of heat source on triggering thermoacoustic instability in a system with Dirichlet or Neumann boundary conditions is investigated. For this a thermoacoustic model of a premixed laminar flame is developed. It is formulated in state-space by expanding flow disturbances via Galerkin series and coupling with a flame model, thus providing a platform on which to gain insight on the system stability behaviors. Transient energy growth analysis is then performed by discretizing the flame model into distributed monopole-like sound sources. It is shown that the thermoacoustic system is non-normal and associated with transient energy growth. Parametric studies are then conducted to study the effects of (1) the flame-acoustics interaction index I, (2) the eigenmode number N, (3) the mean temperature ratio T between pre- and after-combustion regions on the system stability behavior and non-normality. It is found that the maximum transient energy growth Gmax is increased with increased I. Furthermore, the thermoacoustic system with more eigenmodes is found to be associated with a larger Gmax.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy Conversion and Management - Volume 89, 1 January 2015, Pages 309-317
نویسندگان
, , , ,