Results 91 to 100 of about 1,024 (213)

UV and Visible Radiation Characteristics of Thermoacoustic Instabilities in an Ammonia–Methane Premixed Swirl-Stabilized Combustor

Energies
Ammonia (NH3) is a promising carbon-free energy carrier for low-carbon power generation. However, in turbulent ammonia–methane (NH3-CH4) premixed swirling flames, operating at lean conditions to limit NOX, emissions can trigger strong thermoacoustic ...
Junhui Ma, Xianglan Fu, Dongqi Chen, Le Chang, Lingxue Wang, Yingchen Shi, Haocheng Wen, Bing Wang   +7 more
doaj   +1 more source

Boundaries of thermoacoustic instability in the thermoacoustic engine with cryogenic cooling [PDF]

Journal International Academy of Refrigeration, 2020
E.A. Zinoviev, G.V. Vorotnikov, A.I. Dovgyallo, S.O. Nekrasova   +3 more
openaire   +1 more source

MODELING AND ACTIVE CONTROL OF THERMOACOUSTIC INSTABILITIES

IFAC Proceedings Volumes, 2005
Abstract Due to stringent emission regulations, modern gas turbines work in lean premixed mode and thermoacoustic instabilities are often observed. They cause mechanical damage and therefore have to be reduced. This paper describes the development of an acoustic network model for a lab-scale lean premixed methane combustor at ETH Zurich. The model is
André S.P. Niederberger, Bruno B.H. Schuermans, Lino Guzzella   +2 more
openaire   +1 more source

Theoretical prediction of the onset of thermoacoustic instability from the experimental transfer matrix of a thermoacoustic core [PDF]

, 2011
International audienceThe aim of this paper is to propose a method to predict the onset conditions of the thermoacoustic instability for various thermoacoustic engines.
Matthieu Guedra, Guillaume Penelet, Dalmont, Jean-Pierre, Pierrick Lotton, Lotton, Pierrick, Jean-Pierre Dalmont, Guédra, Matthieu, PENELET, Guillaume   +7 more
core   +1 more source

Learning and Characterizing Chaotic Attractors of a Lean Premixed Combustor

Energies
This paper is about the characteristics of and a method to recognize the onset of limit cycle thermoacoustic oscillations in a gas turbine-like combustor with a premixed turbulent methane/air flame.
Sara Navarro-Arredondo, Jim B. W. Kok
doaj   +1 more source

Stability analysis and control of nonlinear thermoacoustic systems with multiple deterministic and stochastic sources by a Green’s function approach [PDF]

Thermoacoustic instabilities result from the interaction between heat and sound in a confined space, and they pose challenges due to self-sustained high amplitude oscillations.
Arabi, Sadaf
core  

Monitoring thermoacoustic instability: A comparative analysis of feature-based and end-to-end deep learning approaches

Applications in Energy and Combustion Science
This paper compares two data-driven frameworks for monitoring thermoacoustic instability (TAI) in a gas turbine combustor. A conventional machine learning approach using handcrafted features is contrasted with an end-to-end deep learning method employing
Jikang Wang, Yichen Wang, Yupeng Qin, Xuan Lv   +3 more
doaj   +1 more source

A novel diagnostic method based on filter bank theory for fast and accurate detection of thermoacoustic instability. [PDF]

Sci Rep, 2021
Joo S, Choi J, Kim N, Lee MC.
europepmc   +1 more source

Suppression of thermoacoustic instability in a swirl-stabilized combustor by inducing blockage in the inlet flow stream [PDF]

, 2018
Swirl flows are often used for flame stabilization in gas turbine combustors. However, when these combustors are operated at lean fuel/air ratios, they are prone to thermoacoustic instability.
Manikandan Raghunathan, Nitin B George, Vishnu R Unni, Unni, Vishnu R, R I Sujith, Raghunathan, Manikandan, Sujith, R I, George, Nitin B   +7 more
core   +1 more source

Investigation of High-Frequency Thermoacoustic Instabilities

, 2021
Dissertation, Universität Duisburg-Essen ...
openaire   +3 more sources