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Article

Novel Carbon Fibre Composite Centrifugal Impeller Design, Numerical Analysis, Manufacturing and Experimental Evaluations

Romanian Research and Development Institute for Gas Turbines COMOTI, 061126 Bucharest, Romania
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Academic Editors: Zina Vuluga and Mihai Cosmin Corobea
Polymers 2021, 13(19), 3432; https://doi.org/10.3390/polym13193432
Received: 19 September 2021 / Revised: 30 September 2021 / Accepted: 3 October 2021 / Published: 7 October 2021
This paper presents an experimental investigation on using high strength-to-weight composite materials to reduce the mass of a centrifugal compressor impeller by 600%. By reducing the blades number from 17 to 7 and by doubling their thickness, the compression ratio and efficiency were maintained close to the reference metallic impeller. Using autoclave technology, seven composite blades were manufactured individually and assembled to form the impeller. After manufacturing, small deviations were found at the blade’s tip. As these deviations were found to be symmetrical, impeller balancing was successfully performed removing a total of 45 g of mass, followed by an experimental test on a dedicated test bench. Experimental testing identified the resonant frequencies of the composite centrifugal impeller at 13.43 Hz 805 rot/min and at 77 Hz with a 0.1 mm/s amplitude at 4400 rot/min, highlighting feasibility and the advantage of a composite compressor impeller design with application in centrifugal compressors and rotating machine assemblies and sub-assemblies. As there are numerous numerical investigations performed on the strength analysis and on the lay-up orientations mechanical behaviour for polymer composite materials with respect to the design of centrifugal impellers, no experimental evaluations in relevant working conditions have been performed to date. As the paper contains relevant experimental data on the subject, the outcome of the paper may aid the oil and gas or aviation industries. View Full-Text
Keywords: composite materials; composite impeller; centrifugal compressor; composite impeller balancing composite materials; composite impeller; centrifugal compressor; composite impeller balancing
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MDPI and ACS Style

Mihalache, R.; Vintila, I.S.; Deaconu, M.; Sima, M.; Malael, I.; Tudorache, A.; Mihai, D. Novel Carbon Fibre Composite Centrifugal Impeller Design, Numerical Analysis, Manufacturing and Experimental Evaluations. Polymers 2021, 13, 3432. https://doi.org/10.3390/polym13193432

AMA Style

Mihalache R, Vintila IS, Deaconu M, Sima M, Malael I, Tudorache A, Mihai D. Novel Carbon Fibre Composite Centrifugal Impeller Design, Numerical Analysis, Manufacturing and Experimental Evaluations. Polymers. 2021; 13(19):3432. https://doi.org/10.3390/polym13193432

Chicago/Turabian Style

Mihalache, Radu, Ionut S. Vintila, Marius Deaconu, Mihail Sima, Ion Malael, Alexandru Tudorache, and Dragos Mihai. 2021. "Novel Carbon Fibre Composite Centrifugal Impeller Design, Numerical Analysis, Manufacturing and Experimental Evaluations" Polymers 13, no. 19: 3432. https://doi.org/10.3390/polym13193432

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