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The authors would like to thank M. Sanchez-Sanz and R. Palomeque for fruitful discussions regarding experimental findings. A.D.G and D.M.R. work was supported by project TED2021-12944 6B-C43 funded by the Spanish MCIN/AEI/10.13039/501100011033 and European Union NextGenerationEU/PRTR. This work was supported in part with computational resources made available during the 5th Madrid Turbulence Workshop 29/05/2023 30/06/2023 funded by the European Research Council under the CausT grant ERC-AdG-101018287.

Analysis of institutional authors

Domínguez-González, AlbaCorresponding AuthorEncinar, Miguel PAuthorMartinez-Ruiz, DanielAuthor

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September 15, 2024
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Pathway dynamics to double-cell premixed flames in lean hydrogen-air mixtures

Publicated to:Proceedings Of The Combustion Institute. 40 (1-4): 105496- - 2024-01-01 40(1-4), DOI: 10.1016/j.proci.2024.105496

Authors: Domínguez-González, A; Encinar, MP; Martínez-Ruiz, D

Affiliations

Univ Carlos III Madrid, Leganes, Spain - Author
Univ Politecn Madrid, Madrid 28040, Spain - Author

Abstract

The propagation of premixed flames over lean hydrogen-air mixtures have been found to be bistable in recent studies, considering slender channels with non-negligible conductive heat losses. In particular, two stable configurations conformed by either a circular or a double-cell flame front arise for the same combination of controlling parameters (fuel mixture, channel size and thermal conductivity). Nevertheless, this multiplicity of solutions lacks a satisfactory explanation to predict the formation of either one structure or the other during a particular ignition transient. In this work, detailed analyses are performed over the unsteady evolution of a set of numerical simulations. Specifically, the initial temperature profiles (distribution and peak value) and subsequent expansion of the flow field prescribe the early growth of the flame front leading to different curvatures and sizes of the kernel that control the evolution into each of the canonical structures. This study explores the underlying physics controlling the final-stage bistable behavior. In particular, the local convective effects and interactions between fronts have been identified as the key causes to produce each of the two stably propagating flames. Frequently found division of kernels cannot ensure the formation of double cells, which require additional reorientation dynamics and merging events due to asymmetric seeding of flame fragments or to interaction with neighboring structures.

Keywords

BistabilityDynamicDynamicsHydrogenPremixed flames

Quality index

Bibliometric impact. Analysis of the contribution and dissemination channel

The work has been published in the journal Proceedings Of The Combustion Institute due to its progression and the good impact it has achieved in recent years, according to the agency WoS (JCR), it has become a reference in its field. In the year of publication of the work, 2024 there are still no calculated indicators, but in 2023, it was in position 27/182, thus managing to position itself as a Q1 (Primer Cuartil), in the category Engineering, Mechanical.

Impact and social visibility

From the perspective of influence or social adoption, and based on metrics associated with mentions and interactions provided by agencies specializing in calculating the so-called "Alternative or Social Metrics," we can highlight as of 2025-08-02:

  • The use of this contribution in bookmarks, code forks, additions to favorite lists for recurrent reading, as well as general views, indicates that someone is using the publication as a basis for their current work. This may be a notable indicator of future more formal and academic citations. This claim is supported by the result of the "Capture" indicator, which yields a total of: 4 (PlumX).

It is essential to present evidence supporting full alignment with institutional principles and guidelines on Open Science and the Conservation and Dissemination of Intellectual Heritage. A clear example of this is:

  • The work has been submitted to a journal whose editorial policy allows open Open Access publication.
  • Assignment of a Handle/URN as an identifier within the deposit in the Institutional Repository: https://oa.upm.es/84578/

As a result of the publication of the work in the institutional repository, statistical usage data has been obtained that reflects its impact. In terms of dissemination, we can state that, as of

  • Views: 75
  • Downloads: 19

Leadership analysis of institutional authors

There is a significant leadership presence as some of the institution’s authors appear as the first or last signer, detailed as follows: First Author (DOMINGUEZ GONZALEZ, ALBA) and Last Author (MARTINEZ RUIZ, DANIEL).

the author responsible for correspondence tasks has been DOMINGUEZ GONZALEZ, ALBA.