Impact of the Stabilized Finite Element Method on Acoustic and Vortical Perturbations in Thermoacoustic Systems
Impact of the Stabilized Finite Element Method on Acoustic and Vortical Perturbations in Thermoacoustic Systems
复制标题
稳定有限元方法对热声系统中声学和涡旋扰动的影响
DOI:
10.1115/1.4049349
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Sattelmayer
中科院分区:
文献类型:
--
作者:
Hofmeister;Hummel;Sattelmayer
This paper seeks to advance linear stability analyses of thermoacoustic systems conducted with the stabilized finite element method (sFEM). Specifically, this work analyzes and quantifies the impact of the streamline-upwind-Petrov–Galerkin (SUPG) artificial diffusion scheme on (eigen)mode shapes and damping rates of the isentropic linearized Euler equations (LEEs) in frequency space. The LEE (eigen)mode shapes are separated into acoustic and vortical perturbation components via a Helmholtz decomposition and their sensitivity on the employed stabilization scheme is investigated separately. The regions where numerical stabilization mainly acts on the perturbation types are identified and explanations for the observations are provided. A methodology is established, which allows the quantification of the impact of artificial diffusion on the acoustic field in terms of a damping rate. This nonphysical damping rate is used to determine the physically meaningful, acoustic LEE damping rate, which is corrected by the contribution of artificial diffusion. Hence, the presented method eliminates a main shortcoming of LEE eigenfrequency analyses with the sFEM and, as a result, provides more accurate information on the stability of thermoacoustic systems.
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DOI:
10.1115/1.4038036
发表时间:
2017
影响因子:
1.5
作者:
F. Berger;T. Hummel;B. Schuermans;T. Sattelmayer
通讯作者:
T. Sattelmayer
影响因子:
4.7
作者:
B. Schuermans;M. Bothien;M. Maurer;B. Bunkute
通讯作者:
B. Bunkute
影响因子:
4.7
作者:
J. Schwing;T. Sattelmayer;N. Noiray
通讯作者:
N. Noiray
DOI:
10.1115/gt2019-90240
发表时间:
2019
期刊:
Volume 4A: Combustion, Fuels, and Emissions
影响因子:
--
作者:
T. Hofmeister;T. Hummel;B. Schuermans;T. Sattelmayer
通讯作者:
T. Sattelmayer
影响因子:
4.1
作者:
M. Zahn;M. Schulze;C. Hirsch;M. Betz;T. Sattelmayer
通讯作者:
T. Sattelmayer