Journal article Open Access
Yaroslav Dvirnyk; Dmytro Pavlenko; Radoslaw Przysowa
{ "inLanguage": { "alternateName": "eng", "@type": "Language", "name": "English" }, "description": "<p>This paper analyzes the health and performance of the 12-stage axial compressor of the<br>\nTV3-117VM/VMA turboshaft operated in a desert environment. The results of the dimensional<br>\ncontrol of 4800 worn blades are analyzed to model the wear process. Operational experience<br>\nand two-phase flow simulations are used to assess the effectiveness of an inlet particle separator.<br>\nNumerical modal analysis is performed to generate the Campbell diagram of the worn blades and<br>\nidentify resonant blade vibrations which can lead to high cycle fatigue (HCF): mode 7 engine order 30<br>\nin the first stage and mode 8 engine order 60 in the fourth. It is also shown that the gradual loss of<br>\nthe stall margin over time determines the serviceability limits of compressor blades. In particular,<br>\nthe chord wear of sixth-stage blades as high as 6.19 mm results in a reduction of the stall margin<br>\nby 15–17% and a permanent stall at 770–790 flight hours. In addition, recommendations setting out<br>\ngo/no-go criteria are made to maintenance and repair organizations.</p>", "license": "https://creativecommons.org/licenses/by/4.0/legalcode", "creator": [ { "@type": "Person", "name": "Yaroslav Dvirnyk" }, { "@type": "Person", "name": "Dmytro Pavlenko" }, { "@type": "Person", "name": "Radoslaw Przysowa" } ], "headline": "Determination of Serviceability Limits of a Turboshaft Engine by the Criterion of Blade Natural Frequency and Stall Margin", "image": "https://zenodo.org/static/img/logos/zenodo-gradient-round.svg", "datePublished": "2019-12-09", "url": "https://zenodo.org/record/3568747", "keywords": [ "gas-turbine performance", "turboshaft", "axial compressor", "blade", "FEM", "CFD", "erosion", "wear", "stall margin", "compressor surge", "brownout" ], "@context": "https://schema.org/", "identifier": "https://doi.org/10.3390/aerospace6120132", "@id": "https://doi.org/10.3390/aerospace6120132", "@type": "ScholarlyArticle", "name": "Determination of Serviceability Limits of a Turboshaft Engine by the Criterion of Blade Natural Frequency and Stall Margin" }
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