Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Tobias Hummel"'
Publikováno v:
Journal of Engineering for Gas Turbines and Power. 143
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) art
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::337ccfff1df3762f198c1a71d60787ed
https://doi.org/10.1115/1.4049349
https://doi.org/10.1115/1.4049349
Publikováno v:
Universal Journal of Accounting and Finance. 6:21-28
This paper applies a data envelopment analysis (DEA) to study the efficiency and productivity changes in the Swiss cantonal bank sector in the period 2006-2014. The efficiency analysis is conducted by applying the production input-oriented DEA variab
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d45febc84e8fce6301a34230ccfda86d
https://doi.org/10.13189/ujaf.2018.060201
https://doi.org/10.13189/ujaf.2018.060201
Publikováno v:
Volume 4A: Combustion, Fuels, and Emissions.
This paper presents a methodology to compute acoustic damping rates of transversal, high-frequency modes induced by vortex-shedding. The acoustic damping rate presents one key quantity for the assessment of the linear thermoacoustic stability of gas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6dd0c6ed9d380b1dfdb928e0b6be4ecb
https://doi.org/10.1115/gt2019-90241
https://doi.org/10.1115/gt2019-90241
Publikováno v:
Volume 4B: Combustion, Fuels, and Emissions.
High-frequency (HF) thermoacoustic instabilities in stationary gas turbine combustors are receiving increased attention as they reduce the operational flexibility and increase the emissions of such machines. This paper deals with the numerical work r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::26920aae34a3adebc897c15abf7c7a40
https://doi.org/10.1115/gt2018-77034
https://doi.org/10.1115/gt2018-77034
Publikováno v:
Volume 4B: Combustion, Fuels, and Emissions.
This paper presents a novel sequential combustor experiment for the study of reheat flame responses to high-frequency, transversal thermoacoustic oscillations. The reheat combustion chamber is of flat, quasi two-dimensional design to distinctly separ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1f3d73cf56da7be718fe73da855298a1
https://doi.org/10.1115/gt2018-77101
https://doi.org/10.1115/gt2018-77101
Publikováno v:
Journal of Engineering for Gas Turbines and Power. 140
This paper presents the experimental investigation of pulsation-amplitude-dependent flame dynamics associated with transverse thermoacoustic oscillations at screech level frequencies in a generic gas turbine combustor. Specifically, the flame behavio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e3488398567bbb6cfddbb5bacd35ff15
https://doi.org/10.1115/1.4038036
https://doi.org/10.1115/1.4038036
Publikováno v:
International Journal of Spray and Combustion Dynamics, Vol 9 (2017)
Self-excited, high-frequency first transversal thermoacoustic instabilities in a cylindrical combustion chamber equipped with a premixed swirl-stabilized flame are investigated. Phase-locked image analysis of the phenomena shows the displacement of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5cf98613f497d18f7b15eeb611be3938
https://doaj.org/article/85e68de69d0c4c29b8090e9995bdb510
https://doaj.org/article/85e68de69d0c4c29b8090e9995bdb510
Autor:
Bruno Schuermans, Frederik M. Berger, Tobias Hummel, Thomas Sattelmayer, Nicolai V. Stadlmair
Publikováno v:
Volume 4A: Combustion, Fuels and Emissions.
This paper presents a set of methodologies for the extraction of linear growth and damping rates associated with transversal eigenmodes at screech level frequencies in thermoacoustically noncompact gas turbine combustion systems from time domain data
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::36e2b09f6148f6ac3b76a3a6eddedb54
https://doi.org/10.1115/gt2017-64233
https://doi.org/10.1115/gt2017-64233
Publikováno v:
Volume 4A: Combustion, Fuels and Emissions.
In this paper, we present a method to determine the quantitative stability level of a lean-premixed combustor from dynamic pressure data. Specifically, we make use of the autocorrelation function of the dynamic pressure signal acquired in a combustor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c884c027678c4e6c32d7c29b31a6a4d7
https://doi.org/10.1115/gt2017-63338
https://doi.org/10.1115/gt2017-63338
Publikováno v:
Journal of Engineering for Gas Turbines and Power. 139
This paper analyzes transversal thermoacoustic oscillations in an experimental gas turbine combustor utilizing dynamical system theory. Limit-cycle acoustic motions related to the first linearly unstable transversal mode of a given 3D combustor confi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ab1cd9a4c8e43eefed80be08301d507d
https://doi.org/10.1115/1.4035529
https://doi.org/10.1115/1.4035529