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Advanced Technologies in Rotating Machinery: Design, Modeling, Manufacturing, Testing, and Operation, 2nd Edition

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

Deadline for manuscript submissions: 30 June 2026 | Viewed by 1352

Special Issue Editor

Department of Mechanical Engineering, Hanyang University, Ansan 15588, Gyeonggi-do, Korea
Interests: turbomachinery rotordynamics; rotating machinery diagnostics and vibration; bearings, seals, and dampers for turbomachinery; advanced turbomachinery with improved stability; cryogenic bearings for liquid rocket engine turbopumps; oil-free turbomachinery; rocket engine turbopumps; electrically assisted turbomachinery; automotive turbochargers; high-speed electric motors/generators; space tribology
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Special Issue Information

Dear Colleagues,

Rotating machinery or turbomachinery is a machine with a rotating component that transfers energy to a fluid or vice versa. Consequently, in a turbomachine, there is energy transfer between the fluid and the rotor through dynamic interaction.

The current Special Issue invites archival-quality papers focused on the broad topic of component and system technologies for rotating machinery. We hope to establish a collection of papers that will be of interest to scholars in the field. Contributions in the form of full papers, reviews, and communications about the related topics are very welcome.

Dr. Keun Ryu
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 250 words) can be sent to the Editorial Office for assessment.

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.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • computational fluid dynamics (CFD) analysis
  • controls, diagnostics, instrumentation, and measurement techniques
  • heat transfer and thermal management
  • new propulsion and power systems
  • steam turbines
  • structures and dynamics
  • advanced gas turbine engines and cycles, and gas turbine hybrids
  • advanced manufacturing concepts for gas turbine engines
  • advances in exhaust technologies (diffusers, nozzles, and related systems)
  • combustors, fuel injectors, alternative fuels, emissions, fuel flexible combustion systems
  • engine controls, operability, and propulsion health management
  • high-fidelity simulations and validation experiments
  • high-speed low pressure turbines
  • multidisciplinary design, analysis/optimization of engine systems and components
  • thermal management, heat transfer and cooling, materials, and coatings
  • rotor dynamics
  • machine components in turbomachinery
  • aerodynamic design, analysis, and test of compressor and turbine blading
  • compressor stall and surge
  • aeromechanical instabilities

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Related Special Issue

Published Papers (2 papers)

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Research

24 pages, 3356 KB  
Article
Thermo-Mechanical Analysis and Design Optimization of an Adjustable Regulating Ring for Single-Screw Compressors
by Kassym Yelemessov, Vladimir Pronin, Vadim Tsvetkov, Dinara Baskanbayeva, Pavel Belov, Tkachenko Denis, Arthur Minikaev, Sanzhar Kalmaganbetov and Darkhan Yerezhep
Appl. Sci. 2026, 16(7), 3557; https://doi.org/10.3390/app16073557 - 5 Apr 2026
Viewed by 486
Abstract
Reliable and energy-efficient capacity control in high-pressure single-rotor screw compressors requires precise regulation of adjustable ring mechanisms operating under combined gas and thermal loading. Thermo-mechanical deformation, friction-induced torque demand, and stress concentration near discharge windows significantly influence structural integrity, clearance stability, and actuation [...] Read more.
Reliable and energy-efficient capacity control in high-pressure single-rotor screw compressors requires precise regulation of adjustable ring mechanisms operating under combined gas and thermal loading. Thermo-mechanical deformation, friction-induced torque demand, and stress concentration near discharge windows significantly influence structural integrity, clearance stability, and actuation performance. This study presents an integrated thermo-structural and analytical investigation of a regulating ring system with a hydraulic wedge-groove drive concept. Three groups of geometric variants (nine configurations total) were analyzed using coupled Steady-State Thermal and Static Structural finite element modeling in ANSYS 19.2. Thermal asymmetry between suction (22 °C) and discharge (120 °C) regions produced peak thermally induced deformation of 0.17–0.18 mm, consuming up to 60–70% of nominal operating clearance. Neglecting thermal effects underestimated peak thermally induced structural deformation of the regulating ring by 12–15%. Among the configurations, variant 2b provided the most balanced response, reducing peak equivalent stress by 12–15% and required actuation torque by 8–11%. An analytical model for friction torque and driving force was derived based on distributed contact pressure. The results reveal quadratic sensitivity of torque to contact radius and strong dependence on groove geometry. The proposed framework supports reliable clearance design and efficient actuation in heavy-duty rotating machinery. Full article
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33 pages, 1887 KB  
Article
Coupled CFD and Physics-Based Digital Shadow Framework for Oil-Flooded Screw Compressors: Rotor Geometry Sensitivity, Transient Pulsation Response, and Annual Climate Penalties
by Dinara Baskanbayeva, Kassym Yelemessov, Lyaila Sabirova, Sanzhar Kalmaganbetov, Yerzhan Sarybayev and Darkhan Yerezhep
Appl. Sci. 2026, 16(7), 3359; https://doi.org/10.3390/app16073359 - 30 Mar 2026
Viewed by 396
Abstract
Screw compressors are critical equipment in oil and gas production and transportation, where efficiency losses caused by rotor geometry, inlet pressure pulsations, and harsh climatic conditions can accumulate into substantial annual energy penalties and reliability degradation. This study provides a quantitative assessment of [...] Read more.
Screw compressors are critical equipment in oil and gas production and transportation, where efficiency losses caused by rotor geometry, inlet pressure pulsations, and harsh climatic conditions can accumulate into substantial annual energy penalties and reliability degradation. This study provides a quantitative assessment of these coupled effects within a unified multiphysics framework that combines time-accurate transient CFD simulations based on a fixed Cartesian immersed-boundary formulation with a climate-calibrated offline physics-based digital twin—functioning as a digital shadow with one-way data flow from archival SCADA records—a reduced-order seasonal model with no real-time updating, calibrated against a full calendar year of SCADA records and validated against a held-out cold-season dataset (October–December 2022, Tamb = −15 to +8 °C); summer-period predictions rely on calibrated extrapolation beyond the validation window—an integration not previously demonstrated for oil-flooded screw compressors. Two rotor profile configurations (Type A and Type B) were analyzed to quantify geometry-driven differences in static pressure distribution, leakage tendency, and pulsation sensitivity. Transient suction conditions were modeled using harmonic and quasi-random inlet pressure disturbances to evaluate pressure amplification, phase lag, leakage intensification, and efficiency degradation. Seasonal performance was assessed by integrating temperature-dependent gas properties, oil viscosity behavior, and external heat transfer into an annual climatic load framework. The results show that inlet oscillations are amplified inside the chambers (pressure amplification factor Пp ≈ 1.95; Пp up to 2.3 under quasi-random excitation), reducing mass flow and volumetric efficiency by 8–10% and decreasing polytropic efficiency from 0.78 to 0.69–0.71, while increasing leakage by up to 27% and raising peak contact pressures to 167–171 MPa. Seasonal variability (+30 to −30 °C) increased suction density by 38% but raised drive power by ~9% due to viscosity-driven mechanical losses, producing an energy penalty up to 10.8% and an estimated annual additional consumption of approximately 186 MWh per compressor, decomposed as: cold-season contribution ~113 MWh (±10 MWh, directly field-validated against October–December 2022 SCADA data) and summer-season contribution ~51 MWh (calibrated extrapolation; additional uncertainty unquantified and not included in the ±10 MWh bound). The full annual figure of 186 MWh should be interpreted as a model-based estimate rather than a fully validated result. These findings demonstrate that rotor design optimization and mitigation of nonstationary suction effects, coupled with climate-aware offline physics-based digital shadow operation, represent high-priority levers for improving efficiency and reducing energy penalties in field conditions; reliability implications require further validation against summer-season field measurements. Full article
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