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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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Escudero, AlvaroCorresponding AuthorRodriguez-Blanco, SalvadorAuthorCorral, RoqueAuthor

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Validation of a Methodology to Assess the Flutter Limit Cycle Oscillation Amplitude of Low-Pressure Turbine Bladed Disks-Part II: Rotational Speed Effects

Publicated to:Journal Of Engineering For Gas Turbines And Power-Transactions Of The Asme. 147 (6): 061002- - 2025-06-01 147(6), DOI: 10.1115/1.4066584

Authors: Escudero, Alvaro; Rodriguez-Blanco, Salvador; Corral, Roque

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Abstract

The effect of the operating conditions on the vibration amplitude trends of an isolated low-pressure turbine rotor is described. The study utilizes an analytical model correlating the aerodynamic and dry-friction work introduced in Part I of the paper. In this Part II, the analysis has been extended to incorporate the influence of rotational speed. The force distribution and the penetration length of the fir-tree contact surfaces are key parameters within the heuristic microslip model used to characterize the friction forces. These parameters change with rotational speed, consequently influencing the dry-friction work involved in the process. The model is closed with numerical simulations to compute the aerodynamic damping, and it is compared against experimental data gathered from the experimental campaign detailed in Part I. The results demonstrate a significant impact of the shaft speed on flutter vibration amplitude. The vibration amplitude has been observed to reach a maximum near the on-design conditions. The analytical model can correctly capture this trend, indicating that the essential physics is retained in it. Nonlinear friction, mistuning, and three-dimensional unsteady aerodynamics have shown to play a predominant role to explain the change of vibration amplitude with the shaft speed.

Keywords

Aerospace engineeringEnergy engineering and power technologyEngenharias iiEngenharias iiiEngineering, mechanicalFuel technologyMechanical engineeringNuclear energy and engineering

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 Scopus (SJR), it has become a reference in its field. In the year of publication of the work, 2025, it was in position , thus managing to position itself as a Q2 (Segundo Cuartil), in the category . Notably, the journal is positioned en el Cuartil Q3 for the agency WoS (JCR) in the category Engineering, Mechanical.

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 2025-05-31:

  • WoS: 1
  • Scopus: 1

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 2025-05-31:

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

    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.