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Valerie Hernley, Aleksandar Jemcov, Jeongseek Kang, Matthew Montgomery and Scott C. Morris
The relationship between aerodynamic forcing and non-synchronous vibration (NSV) in axial compressors remains difficult to ascertain from experimental measurements. In this work, the relationship between casing pressure and blade vibration was investigat...
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Abdelrahman S. Abdeldayem, Salma I. Salah, Omar A. Aqel, Martin T. White and Abdulnaser I. Sayma
Supercritical carbon dioxide (sCO2) can be mixed with dopants such as titanium tetrachloride (TiCl4), hexafluoro-benzene (C6F6), and sulphur dioxide (SO2) to raise the critical temperature of the working fluid, allowing it to condense at ambient temperat...
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Alexios Alexiou, Ioannis Kolias, Nikolaos Aretakis and Konstantinos Mathioudakis
An approach for preliminary aero-engine design, incorporating a mean-line code for the design of axial-flow, multi-stage compressors, is presented. The compressor mean-line code is developed and integrated within a framework for the preliminary design an...
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Loris Simonassi, Gustavo Lopes and Sergio Lavagnoli
The influence of unsteady wakes incoming from the upstream stages is of high relevance in modern high-speed, low-pressure turbines (LPT) operating at transonic exit Mach numbers and low Reynolds numbers for their potential to trigger transition and influ...
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Yumin Liu, Patrick Hendrick, Zhengping Zou and Frank Buysschaert
Empirical correlations are still fundamental in the modern design paradigm of axial turbines. Among these, the prominent Ainley and Mathieson correlation (Ainley D. and Mathieson G., 1951, ?A Method of Performance Estimation for Axial-Flow Turbines,? ARC...
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Benedetto Piaggio, Giuliano Vernengo, Marco Ferrando, Giorgio Mazzarello and Michele Viviani
Submarines? manoeuvrability both in intact and degraded operating conditions is the main design concern starting at the very early stages of design. This increased complexity of the design process compared to a surface vehicle can only be handled by usin...
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Mohammad Abbas and David W. Riggins
The global control volume-based energy utilization balance for an aerospace vehicle is extended to allow for the analysis of jet-propelled vehicles. The methodology is first developed for analyzing the energy utilization and entropy generation characteri...
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Daniel Duda, Tomá? Jelínek, Petr Milcák, Martin Nemec, Václav Uruba, Vitalii Yanovych and Pavel ?itek
A feasibility study of velocity field measurements using the Particle Image Velocimetry (PIV) method in an axial air turbine model is presented. The wakes past the blades of the rotor wheel were observed using the PIV technique. Data acquisition was sync...
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Danilo Calcagni, Giulio Dubbioso, Alessandro Capone, Fabrizio Ortolani and Riccardo Broglia
During maneuvers, propellers? operation differs from their design due to strong modification of the wake field with respect to the straight-ahead motion. The consequent modification of the loads overstresses the mechanical components of the shaftline, ex...
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Hu Zhang, Jianbo Zang, Weidong Shi and Desheng Zhang
To understand the formation mechanism and evolution process of the perpendicular cavitation vortex (PCV) of an axial flow pump for off-design conditions, turbulent cavitating flows were numerically investigated using the rotation curvature-corrected shea...
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