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Analysis of institutional authors

Escudero, AlvaroCorresponding AuthorRodriguez-Blanco, SalvadorAuthorCorral, RoqueAuthor

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May 13, 2025
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Validation of a Methodology to Assess the Flutter Limit-Cycle Oscillation Amplitude of Low-Pressure Turbine Bladed Disks-Part I: Mach Number Effects

Publicated to: JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME. 147 (6): 061001- - 2025-06-01 147(6), DOI: 10.1115/1.4066587

Authors:

Escudero, Alvaro; Rodriguez-Blanco, Salvador; Corral, Roque
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Affiliations

Univ Politecn Madrid, Sch Aeronaut & Space, Dept Fluid Dynam & Aerosp Prop, Madrid 28040, Spain - Author
Univ Politecn Madrid, Sch Aeronaut & Space, Madrid 28040, Spain - Author

Abstract

This paper presents a methodology to estimate the vibration amplitude of fluttering low-pressure turbine (LPT) blades saturated due to friction effects. The study utilizes an analytical model that balances aerodynamic work and dry-friction work. The analytical predictions are compared against experimental results to validate the model. The first part of this paper focuses on the influence of the Mach number on the work balance between aerodynamic and mechanical components. It is observed that the vibration amplitude of low-pressure turbine rotor blades notably increases with higher Mach numbers. In addition, numerical simulations are employed to assess the influence of the Mach number on the critical damping ratio. The results demonstrate that an appropriate scaling of the critical damping ratio with the exit Mach number collapses all the damping versus interblade phase angle curves into a single curve. This finding validates the scaling of the aerodynamic damping for different pressure ratios. Unsteady pressure measurements were acquired, carefully postprocessed to extract their flutter-induced peak components, and presented in a nodal diameter (ND) by nodal diameter basis. The postprocessed data were then used to characterize the vibration amplitude observed in the experiments. The trends of the measured unsteady pressure on the casing of a rotating rig and the proposed model with the Mach number for different shaft speeds are in good agreement. The vibration amplitude and the mean unsteady pressure increase with the Mach number and exhibit a maximum with the shaft speed.
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Keywords

Micro-sliRotor blades

Quality index

Bibliometric impact. Analysis of the contribution and dissemination channel

The work has been published in the journal JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME 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, 2025, it was in position 91/182, thus managing to position itself as a Q2 (Segundo Cuartil), in the category Engineering, Mechanical. Notably, the journal is positioned en el Cuartil Q2 para la agencia Scopus (SJR) en la categoría Aerospace Engineering.

Independientemente del impacto esperado determinado por el canal de difusión, es importante destacar el impacto real observado de la propia aportación.

Según las diferentes agencias de indexación, el número de citas acumuladas por esta publicación hasta la fecha 2026-04-02:

  • WoS: 2
  • Scopus: 3
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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 2026-04-02:

  • 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: 1 (PlumX).

With a more dissemination-oriented intent and targeting more general audiences, we can observe other more global scores such as:

    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:

    • Assignment of a Handle/URN as an identifier within the deposit in the Institutional Repository: https://oa.upm.es/87676/

    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: 156
    • Downloads: 1
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    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 (ESCUDERO SAIZ, ÁLVARO) and Last Author (CORRAL GARCIA, ROQUE).

    the author responsible for correspondence tasks has been ESCUDERO SAIZ, ÁLVARO.

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    Awards linked to the item

    The authors want to thank all the participants of the ARIAS work package two for their contribution in setting up the CTA experimental campaign and the rotor blade redesign. The authors want to thank ITP for providing access to ITP's design system.
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