The assessment of gas turbine vanes based on the watershed segmentation of their surface images

• Autorzy: Błachnio J. , Bogdan M.

Identyfikatory

DOI

10.5604/12314005.1213522

• Języki publikacji: EN

Abstrakty

EN

The article discusses the linkage between the colour changes of the recorded surface images of vanes and their state. For this purpose, we used a selection of techniques and methods for processing and analysis of digital images (pre-processing, watershed segmentation,) for the colour representation other than RGB model [2, 4]. Difficult to interpret pixel information was replaced with an area information (extracted in the process of segmentation areas with certain characteristics and attributes – the relationship between the state of the vane and its colour). The proposed colour representation of the surface of the vanes (HSV model) allows separation of image data – the separation of luminance (brightness) from the colour (chrominance). This enables better interpretation of the obtained results of segmentation, and thus the quality of the resulting diagnostic information is increased. The obtained results allow the introduction of the tri-status classification of the vanes (operable, partially operable, and inoperable). The study adopted operated vanes (with different technical state) of gas-turbine stator vanes of an aircraft jet engine, made from ŻS – 6K alloy. The digital surface images (photos) of vanes were recorded after their dismantlement, by the use of a digital camera (fixed conditions of registration, selection of the appropriate light source, uniform illumination of the photographed surfaces, no reflections). This information is essential for the on-going, non-destructive assessment of the technical state of vanes.

Słowa kluczowe

EN

turbine vanes; colour surface; watershed segmentation

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2016
• Tom: Vol. 23, No. 1
• Strony: 75--82
• Opis fizyczny: Bibliogr. 16 poz., rys.

Twórcy

autor

Błachnio J.

• Air Force Institute of Technology Ksiecia Boleslawa Street 6, 01-494 Warsaw, Poland tel.: [phone], fax: [phone]

autor

Bogdan M.

• Bialystok Technical University, Faculty of Mechanical Engineering Wiejska Street 45, 15-333 Bialystok, Poland tel.:[phone], fax. [phone]

Bibliografia

• [1] Błachnio, J., The effect of high temperature on the degradation of heat-resistant and high-temperature alloys, Journal Solid State Phenomena, Vol. 147-149, pp. 744-752, 2009.
• [2] Blachnio J., Bogdan, M., A non-destructive method to assess condition of gas turbine blades, based on the analysis of blade-surface images, Russian Journal of Nondestructive Testing, Vol. 46, No 11, pp. 89-98, 2010.
• [3] Błachnio, J., Bogdan, M., The assessment of the condition of gas turbine vanes based on the colour of their surface, Chapter in a monograph titled Problems of research and operation in aviation technology, T. 8, Ed. ITWL, pp. 11-33, 2012.
• [4] Błachnio, J., Bogdan, M., Kułaszka, A., New non-destructive methods of diagnosing health of gas turbine blades, Advances in gas turbine technology (ed. by Ernesto Benini), Rijeka, Intech, pp. 465-498, 2011.
• [5] Błachnio, J., Dięgielewski, W., Kułaszka, A., Zasada, D., The Influence of Exploitative Factors on the Heatproof Layer of Gas Turbine’s Blades, Studies and Proceedings of Polish Association for Knowledge Management, No. 68, pp. 17-31, 2014.
• [6] Błachnio, J., Pawlak, W. J., Damageability of gas turbine blades – evaluation of exhaust gas temperature in front of the turbine using a non-linear observer, An Advances in Gas Turbine Technology, InTech, 2011.
• [7] Bogdan, M., Diagnostic examinations of gas turbine blades by means of digital processing of their surface images, PhD Thesis, Technical University of Bialystok, Bialystok, 2009.
• [8] Bogdan, M., Błachnio, J., The condition assessment of in-service vanes of gas turbine nozzle unit with help of digital analysis of vane surface, Journal of Polish CIMAC, Vol. 4, No 3, pp. 23-30, 2009.
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• [14] Skočovský, P., Podrábský, T., Belan, J., Degradation as a result of operation of aluminium-silicon turbine vanes made of Ni base, Archives of Mechanical Technology and Materials, Vol. 24, No. 1, pp. 45-52, Poznan 2004.
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• [16] Zabrocka, I., Condition assessment of the gas turbine vanes on the basis of the analysis of the colour of its surface, Master thesis, Technical University of Bialystok 2014.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.