Cavitation resistance of turbine runner blades at the hydropower plant 'Djerdap'
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Hydropower plants need to develop means of protection of turbine and hydromechanical equipment from undesirable occurrences, such as degradation of parent material and/or weld metal of parts and structures caused by stresses and unpredictable influence of vibrations, fatigue, corrosion, erosion and cavitation. Results of tests that refer to the cavitation resistance of turbine runner blades made of cast steel 08X15H4 pi M pi, in accordance with GOST standard are presented in this paper. For the testing of cavitation resistance, the ultrasonic vibration test method is used (with the stationary sample), for which it is necessary to measure the mass loss during specified time intervals, while the cavitation resistance of the material is being defined, taking into account the incubation period and cavitation rate. Scanning electron microscope analysis is carried out to study the morphology of sample damage due to cavitation. The obtained results show that the tested steel has a good cavita...tion resistance and that fatigue is the main failure mechanism.
Keywords:
turbine / runner blade / cavitation damage / cavitation rate / incubation periodSource:
Structural Integrity and Life, 2017, 17, 1, 55-60Publisher:
- Society for Structural Integrity and Life, Institute for Material Testing
Funding / projects:
- Development of new revitalization methodologies for hydro power plant turbine and hydro-mechanical equipment in relation to causes of material degradation (RS-MESTD-Technological Development (TD or TR)-35002)
Institution/Community
Tehnološko-metalurški fakultetTY - JOUR AU - Dojčinović, Marina AU - Arsić, Miodrag AU - Bošnjak, Srđan AU - Murariu, Alin AU - Malesević, Zoranka PY - 2017 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3504 AB - Hydropower plants need to develop means of protection of turbine and hydromechanical equipment from undesirable occurrences, such as degradation of parent material and/or weld metal of parts and structures caused by stresses and unpredictable influence of vibrations, fatigue, corrosion, erosion and cavitation. Results of tests that refer to the cavitation resistance of turbine runner blades made of cast steel 08X15H4 pi M pi, in accordance with GOST standard are presented in this paper. For the testing of cavitation resistance, the ultrasonic vibration test method is used (with the stationary sample), for which it is necessary to measure the mass loss during specified time intervals, while the cavitation resistance of the material is being defined, taking into account the incubation period and cavitation rate. Scanning electron microscope analysis is carried out to study the morphology of sample damage due to cavitation. The obtained results show that the tested steel has a good cavitation resistance and that fatigue is the main failure mechanism. PB - Society for Structural Integrity and Life, Institute for Material Testing T2 - Structural Integrity and Life T1 - Cavitation resistance of turbine runner blades at the hydropower plant 'Djerdap' EP - 60 IS - 1 SP - 55 VL - 17 UR - https://hdl.handle.net/21.15107/rcub_technorep_3504 ER -
@article{ author = "Dojčinović, Marina and Arsić, Miodrag and Bošnjak, Srđan and Murariu, Alin and Malesević, Zoranka", year = "2017", abstract = "Hydropower plants need to develop means of protection of turbine and hydromechanical equipment from undesirable occurrences, such as degradation of parent material and/or weld metal of parts and structures caused by stresses and unpredictable influence of vibrations, fatigue, corrosion, erosion and cavitation. Results of tests that refer to the cavitation resistance of turbine runner blades made of cast steel 08X15H4 pi M pi, in accordance with GOST standard are presented in this paper. For the testing of cavitation resistance, the ultrasonic vibration test method is used (with the stationary sample), for which it is necessary to measure the mass loss during specified time intervals, while the cavitation resistance of the material is being defined, taking into account the incubation period and cavitation rate. Scanning electron microscope analysis is carried out to study the morphology of sample damage due to cavitation. The obtained results show that the tested steel has a good cavitation resistance and that fatigue is the main failure mechanism.", publisher = "Society for Structural Integrity and Life, Institute for Material Testing", journal = "Structural Integrity and Life", title = "Cavitation resistance of turbine runner blades at the hydropower plant 'Djerdap'", pages = "60-55", number = "1", volume = "17", url = "https://hdl.handle.net/21.15107/rcub_technorep_3504" }
Dojčinović, M., Arsić, M., Bošnjak, S., Murariu, A.,& Malesević, Z.. (2017). Cavitation resistance of turbine runner blades at the hydropower plant 'Djerdap'. in Structural Integrity and Life Society for Structural Integrity and Life, Institute for Material Testing., 17(1), 55-60. https://hdl.handle.net/21.15107/rcub_technorep_3504
Dojčinović M, Arsić M, Bošnjak S, Murariu A, Malesević Z. Cavitation resistance of turbine runner blades at the hydropower plant 'Djerdap'. in Structural Integrity and Life. 2017;17(1):55-60. https://hdl.handle.net/21.15107/rcub_technorep_3504 .
Dojčinović, Marina, Arsić, Miodrag, Bošnjak, Srđan, Murariu, Alin, Malesević, Zoranka, "Cavitation resistance of turbine runner blades at the hydropower plant 'Djerdap'" in Structural Integrity and Life, 17, no. 1 (2017):55-60, https://hdl.handle.net/21.15107/rcub_technorep_3504 .