Intrinsic thermo-acoustic instability criteria based on frequency response of flame transfer function

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Fältnamn	Indikatorer	Metadata
000		03133naa a2200301 4500
001		oai:DiVA.org:kth-333424
003		SwePub
008		230801s2022 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
024	7	a https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3334242 URI
040		a (SwePub)kth
041		a engb eng
042		9 SwePub
072	7	a ref2 swepub-contenttype
072	7	a kon2 swepub-publicationtype
100	1	a Kojourimanesh, Mohammadu Dept. of Mechanical Engineering, TU/e, Eindhoven, The Netherlands4 aut
245	1 0	a Intrinsic thermo-acoustic instability criteria based on frequency response of flame transfer function
264	1	b The Institute of Noise Control Engineering of the USA, Inc.c 2022
338		a print2 rdacarrier
500		a Part of ISBN 9781906913427QC 20230801
520		a A study of Intrinsic Thermo-Acoustic (ITA) instability behavior of flames anchored to a burner deck is performed by introducing a mapping between the Flame Transfer Function, FTF(s), defined in the complex (Laplace) domain and the experimentally measured Flame Frequency Response, FFR(iω). The conventional approach requires a system identification procedure to obtain the FTF(s) from the measured FFR(iω). Next, root-finding techniques are applied to define the complex eigenfrequencies. The common practice is to fit the FTF(s) by a rational function that may lead to artifacts like spurious poles and zeros. The purpose of the present work is to establish instability criteria which are directly applicable in the frequency domain. The particular case is considered where the acoustic boundary conditions at both sides of the flame are anechoic. Therefore, the pure ITA mode is treated. First, the causality of the measured FFR(iω) is checked. Then, the criteria of the ITA mode instability applicable to the FFR(iω) phase and magnitude, are derived. Causality properties are used to find the unstable frequency, growth rate, and even the maximum possible value of the linear growth rate. In addition, a procedure is explained to reconstruct the flame transfer function in the complex plane s from the measured flame frequency response which could be an alternative method to study the FTF behavior in the complex domain instead of its estimation with a rational function.
650	7	a TEKNIK OCH TEKNOLOGIERx Maskinteknikx Strömningsmekanik och akustik0 (SwePub)203062 hsv//swe
650	7	a ENGINEERING AND TECHNOLOGYx Mechanical Engineeringx Fluid Mechanics and Acoustics0 (SwePub)203062 hsv//eng
700	1	a Kornilov, Viktoru Dept. of Mechanical Engineering, TU/e, Eindhoven, The Netherlands4 aut
700	1	a de Goey, Philipu Dept. of Mechanical Engineering, TU/e, Eindhoven, The Netherlands4 aut
700	1	a Lopez Arteaga, Inesu KTH,Teknisk mekanik,Dept. of Mechanical Engineering, TU/e, Eindhoven, The Netherlands4 aut0 (Swepub:kth)u1gy0h8d
710	2	a Dept. of Mechanical Engineering, TU/e, Eindhoven, The Netherlandsb Teknisk mekanik4 org
773	0	t Internoise 2022d : The Institute of Noise Control Engineering of the USA, Inc.
856	4 8	u https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-333424

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By the author/editor: Kojourimanesh, M ...; Kornilov, Viktor; de Goey, Philip; Lopez Arteaga, I ...

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ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Mechanical Engin ...; and Fluid Mechanics ...

Articles in the publication: Internoise 2022

By the university: Royal Institute of Technology

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