Global and Local Hydrodynamic Stability Analysis as a Tool for Combustor Dynamics Modeling
Global and Local Hydrodynamic Stability Analysis as a Tool for Combustor Dynamics Modeling
复制标题
全局和局部水动力稳定性分析作为燃烧室动力学建模的工具
DOI:
--
复制
发表时间:
2015
期刊:
影响因子:
--
通讯作者:
C. Paschereit
中科院分区:
文献类型:
--
作者:
P. Paredes;S. Terhaar;K. Oberleithner;V. Theofilis;C. Paschereit
Coherent flow structures in shear flows are generated by instabilities intrinsic to the hydrodynamic field. In a combustion environment, these structures may interact with the flame and cause unsteady heat release rate fluctuations. Prediction and modeling of these structures is thereby highly wanted for thermo-acoustic prediction models. In this work we apply hydrodynamic linear stability analysis to the time-averaged flow field of swirl-stabilized combustors obtained from experiments. Recent fundamental investigations have shown that the linear eigenmodes of the mean flow accurately represent the growth and saturation of the coherent structures. In this work biglobal and local stability analysis is applied to the reacting flow in an industry-relevant combustion system. Both the local and the biglobal analysis accurately predicts the onset and structure of a self-excited global instability that is known in the combustion community as a precessing vortex core (PVC). However, only the global analysis accurately predicts a globally stable flow field for the case without the oscillation, while the local analysis wrongly predicts an unstable global growth rate. The predicted spatial distribution of the amplitude functions using both analysis agree very well to the experimentally identified global mode. The presented tools are considered as very promising for the understanding of the PVC and physics based flow control.Copyright © 2015 by ASME
登录
查看更多内容
影响因子:
1.9
作者:
S. Terhaar;K. Oberleithner;C. O. Paschereit
通讯作者:
C. O. Paschereit
影响因子:
4.4
作者:
G. Kuenne;A. Ketelheun;J. Janicka
通讯作者:
G. Kuenne;A. Ketelheun;J. Janicka
DOI:
10.1016/j.proci.2014.07.035
发表时间:
2015
期刊:
--
影响因子:
--
作者:
S. Terhaar;K. Oberleithner;C. Paschereit
通讯作者:
S. Terhaar;K. Oberleithner;C. Paschereit
DOI:
10.1115/1.4025130
发表时间:
2013
影响因子:
1.5
作者:
K. Oberleithner;S. Terhaar;L. Rukes;C. O. Paschereit
通讯作者:
C. O. Paschereit