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Flow characteristics of an automotive compressor with an additively manufactured rotor disc

Andrearczyk Artur

Archives of Thermodynamics

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2021

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Vol. 42, no 1

3--13

EN

This paper presents the results of experimental research regarding the determination of the flow characteristics of the compressor of an automotive turbocharger with a plastic rotor disc. The disc was manufactured using the 3D printing technology called the multijet printing, which allows complex geometries to be printed with high precision. Currently, in addition to speeding up the manufacturing processes and reducing their costs, 3D printing technologies are increasingly seen as standard tools that can be used in the design and optimization of machine parts. This article is a continuation of research on the possibility of applying additively manufactured elements in turbomachines. The experimental research was carried out at high rotational speeds (up to 110 000 rpm), using the automotive turbocharger with two different compressor rotors (i.e. one aluminum and one polymer). The first chapters of the paper discuss the preparation stage of the research (i.e. the manufacture of the rotor, the test rig). Then, the experimental research and the flow characteristics are described. The results obtained for the two types of discs were compared with each other and the area of application of the additively manufactured rotor was determined. The rotor functioned properly in the range of tested operating parameters and the results obtained showed that the technology and material applied could be used in the optimization studies of the blade systems of high-speed fluid-flow machines.

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Vibration analysis of a turbocharger with an additively manufactured compressor wheel

Andrearczyk Artur, Bagiński Paweł

Zeszyty Naukowe. Transport / Politechnika Śląska

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2020

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z. 107

05--17

EN

This article presents the vibration analysis of a turbocharger, whose compression wheel was manufactured using a high-precision additive manufacturing technology. Currently, there are advance studies around the world for the development of parts of innovative fluid-flow machines using additive manufacturing techniques. The experimental research was carried out under conditions of reduced flow temperatures. The tests and the analysis were performed on a wheel manufactured using a 3D printing technology and on a conventionally used aluminium wheel. Apart from an FFT analysis of the vibration signal during machine operation, a machine run-up test was conducted (up to a speed of 105,000 rpm). The results showed the positive impact of the use of a plastic wheel on the dynamics of the system at a certain speed range, which might contribute to the development of a new method to optimise the geometry of flow systems in small high-speed turbomachines. A modified automotive turbocharger was subjected to experiments on a test stand.

3

The Use of Additive Manufacturing Technology to Manufacture Slide Bearing Sleeves – a Preliminary Study

Andrearczyk Artur, Bagiński Paweł

Tribologia

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2020

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nr 3

7--14

EN

The paper presents the application of an unconventional method of manufacturing bearing sleeves as well as the carrying out of preliminary research in which the manufactured components were used on a real object. Additive manufacturing methods are increasingly being used, which leads to the rapid development of technologies and their applications. The MultiJet Printing technology was used in the research, which allows precise 3D printing of sleeves made of polymeric materials. The first part of the article deals with the selected manufacturing method and the preparation of a model. The study aimed at evaluating the usefulness of bearings manufactured using the 3D printing technology to support slow-speed rotors. The preliminary research described focuses on the study of operating parameters such as the moment of friction and the bearing node temperature as a function of rotational speed during operation. Experimental tests were carried out at low rotational speeds. This paper presents and determines the scope of the application of bearings manufactured using 3D printing technology.

PL

W pracy przedstawiono zastosowanie niekonwencjonalnej metody wytwarzania panwi łożysk wraz z przeprowadzeniem badań wstępnych z użyciem wykonanych elementów na obiekcie rzeczywistym. Metody wytwarzania addytywnego stosowane są na coraz większą skalę, co wiąże się ze znacznym rozwojem technologii i ich aplikacjami. Do badań wykorzystano technologię MultiJet Printing, pozwalającą na precyzyjny wydruk 3D panwi z materiałów polimerowych. Pierwsza część pracy poświęcona jest wybranej metodzie wytwarzania i przygotowaniu modelu. Celem pracy było określenie przydatności łożysk wykonanych technologią wydruku 3D do podparcia wolnoobrotowych wirników. Opisywane badania wstępne obejmują poznanie takich parametrów pracy jak moment tarcia oraz temperatura węzła łożyskowego w funkcji prędkości obrotowej podczas pracy. Część eksperymentalną przeprowadzono w warunkach niskich prędkości obrotowych. W niniejszej pracy przedstawiono i określono zakres zastosowań łożysk wytworzonych omawianą w artykule metodą wydruku 3D.