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Advances in Structural Design for Turbomachinery Applications

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Mechanical Engineering".

Deadline for manuscript submissions: 30 January 2025 | Viewed by 650

Special Issue Editors


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Guest Editor
Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10139 Torino, Italy
Interests: bladed disk structural dynamics; nonlinear vibrations in frictionally damped systems; reduction techniques; aeroelasticity
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Department of Industrial Engineering, University of Florence via di Santa Marta, 3, 50139 Florence, Italy
Interests: validation of radical engine architecture systems

Special Issue Information

Dear Colleagues,

In recent years, new methodologies to guide the design of complex systems such as turbomachinery have been introduced into industrial practices.

The performance enabled by new computer architectures, together with consolidated collaboration between industry and academia, has led to a broader framework of actions that can be performed from the preliminary design stage, reducing the time needed to develop a new product.

The computer-aided engineering paradigm of a sequence of operations, from CAD to FEM, then to manufacturing and, finally, to model updates, is changing to a model-based design framework where the designer is supported in reducing the simulation time and engineering time to validate a complex design, including a database of measurements in the field to predict the behavior of the system in service.

This Special Issue deals with new approaches to optimizing the design of complex systems such as turbomachinery, including the following topics:

  • Parametric reduced-order models;
  • Exploitation of high-performance computing;
  • Digital twin development;
  • Multiphysics simulation environments including aero-elastic effects, contact mechanics, and friction joint modeling;
  • New hybrid electric solutions for propulsion systems in aviation and related structural supports;
  • Machine learning and data-driven design methods;
  • Life-cycle assessment for sustainable designs.

Dr. Christian Maria Firrone
Dr. Lorenzo Pinelli
Guest Editors

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

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Keywords

  • parametric reduced-order models
  • exploitation of high-performance computing
  • digital twin development
  • multiphysics simulation environment including aero-elastic effects, contact mechanics, and friction joint modeling
  • new hybrid electric solutions for propulsion systems in aviation and related structural supports
  • machine learning and data-driven design methods
  • life-cycle assessment for sustainable designs

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Published Papers (1 paper)

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Research

17 pages, 7674 KiB  
Article
Nonlinear Vibrations of Low Pressure Turbine Bladed Disks: Tests and Simulations
by Umidjon Usmanov, Giuseppe Battiato, Christian Maria Firrone, Marta Conte, Emanuele Rosso and Antonio Giuseppe D’Ettole
Appl. Sci. 2024, 14(22), 10597; https://doi.org/10.3390/app142210597 - 17 Nov 2024
Viewed by 430
Abstract
One of the most effective methods to limit the mechanical vibrations of bladed disks is the use of friction damping at mechanical joint interfaces. Unfortunately, dedicated tests to assess the impact of mistuning and the effectiveness of friction dampers are uncommon. This paper [...] Read more.
One of the most effective methods to limit the mechanical vibrations of bladed disks is the use of friction damping at mechanical joint interfaces. Unfortunately, dedicated tests to assess the impact of mistuning and the effectiveness of friction dampers are uncommon. This paper presents an original design of an academic demonstrator to perform an experimental analysis of the dynamic response of a tip-free bladed disk with under-platform dampers (UPDs), including an identification of intrinsic and contact mistuning introduced by the UPDs. The 48-blade disk was tested in a vacuum spinning rig by using permanent magnets. Vibration measurements were performed with the Blade Tip-Timing system. Tests were simulated using the Policontact tool, which predicted the average experimental nonlinear response in the presence of UPD, confirming the tool’s ability to capture the general nonlinear dynamic behavior of the mistuned bladed disk. This study presents a novel approach combining experimental Blade Tip Timing (BTT) with numerical simulations using Policontact (ver. 3.0) software and a model update based on experimental evidence to validate nonlinear dynamic responses. It distinguishes between intrinsic and contact mistuning effects, providing new insights into their impact on bladed disk vibrations. Additionally, a comparison of aluminum and steel UPDs reveals that steel offers a 26% greater damping efficiency due to its higher density and preload, significantly improving vibration reduction. Full article
(This article belongs to the Special Issue Advances in Structural Design for Turbomachinery Applications)
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