Problems of new materials for turbomachine blading
DOI:
https://doi.org/10.20998/2078-774X.2016.09.06Анотація
Increasing the unit and the power density and efficiency of turbomachines leads to increased intensity of thermal and mechanical loads on the blading. In this regard, there is need for new materials. Purpose of work is analysis of problems of the blading strength under different loads. The features of the thermal, thermoelastic and vibration state of the cooled blades of gas turbine engine from single-crystal materials are considered by finite element method. The influence of the axial orientation of the crystallographic axes in the thermoelastic state and parameters of blade vibrations are investigated. The use of titanium alloys allows to increase the length of the blades of the last stages of turbines for nuclear power plants, but these blades work in an environment of wet steam and prone to erosion. The analysis of stress concentration in the area of erosion damage of the blades from a titanium alloy for the last stages of a powerful steam turbine was carried out. Blading and corps of the gas turbine engine experiencing impact load during exploitation. Elements of corps are often made from composite materials. The features of high-rate deformation elements corps of the gas turbine engine under impact loads are investigated. The use of new materials are significantly extends the capabilities of turbomachines, but requires special research of strength, thermal elasticity, vibrations and high-rate deformation of the elements for appropriate structures.Посилання
Borovkov, V. M., Getsov, L. B., Vorobiov, Iu. S., Kopsov, A. Ya., Petinov, S. V., Pigrova, G. D. and Rybnikov, A.I.(2008),Materialy i prochnost' oborudovanija TJeS [Materials and strength of TPP equipment],PublishingHouseSanktPeterburg,St.Petersburg, Russia, ISBN 978-5-7422-1887-6.
Nozhnitskiy, Yu. A and Golubovskiy, Ye. R. (2009), "O prochnostnoj nadezhnosti monokristallicheskih rabochihlopatokvysokotemperaturnyh turbin perspektivnyh GTD [About the strength reliability of single crystal rotor blades ofthehigh-temperature turbine of perspective gas turbin engeen]", Prochnost' materialov iresursjelementovjenergooborudovanija.Tr.CKTI[Strength of materials and resource elements of power. Tr. TSKTI], vol. 296,pp.74–82, ISSN 0321-3366.
Shalin, R. Ye., Svetlov, I. L., Kachanov, Ye. B. et al. (1997), Monokristally nikelevyh zharoprochnyh splavov: monogr[Singlecrystals of nickel superalloys], Mashinostroenie Engineering, Moscow, Russua.
Pridorozhnyy R. P., Sheremet'yev, A. V. and Zin'kovskiy, A. P. (2013), "Ocenka vlijanija azimutal'noj orientaciinanaprjazhennost' monokristallicheskoj ohlazhdaemoj lopatki v sisteme perforacionnyh otverstij [Assessingtheimpactoftheazimuthalorientation of the tensions cooled single crystal blades in a systemofperforations]",Vestnikdvigatelestroeniija[Journal of Engine building], no. 1, pp. 53–57, ISSN 1727-0219.
Ebrahimia, F., Foreroa, L. E., Siddiquib, S. and Arakereb, N. (2006), "Effect of notch orientation on the evolution ofplasticityin superalloy single crystals", Mechanical and Aerospace Engineering, University of Florida,Gainesville,FL,UnitedStates,May2006.
Vorobiov, Iu. S., Ovcharova, N. Iu., Berlizova, T. Iu., Kulishov, S. B. and Skritskiy, A. N. (2014),"Osobennostitemperaturnogo i termouprugogo sostojanija monokristallicheskoj ohlazhdaemoj lopatki GTD[Featurestemperatureandthermoelastic state-cooled single-crystal GTE blades]", Aviacionno-kosmicheskaja tehnika i tehnologija[AerospaceEngineering and Technology], no. 10(117), pp. 75–78, ISSN 1727-7337.
Vorobiov, Iu. S., Dyakonenko, K. Yu., Kulishov, S. B., Skritskij A. N. and Rzadkowski R. (2014), "Vibration characteristicsofcooled single-crystal gas turbine blades", Journal of vibration engineering & technologies, vol. 2, no.6,December, pp. 537–541,ISSN 2321-3558.
Petukhov, A. N. (1993), Soprotivlenie ustalosti detalej GTD [Resistance to fatigue GTE parts], Mashinostroenie[Engineering],Moscow, Russia.
Shubenko, A. L., Koval'skiy, A. E., Vorobiov, Yu. S., Konilo, S. P., Romanenko, V. N. (2003), "Vlijanie jerozii navibracionnyeharakteristiki rabochih lopatok vlazhno-parovyh turbin [Effect of erosion on the vibration characteristics ofrotorblades wet-steam turbines]", Problemy mashinostroenija [Engineering Problems], vol. 6, no. 1, pp. 10–26.
Vorobiov, Iu. S., Kruszka, L. and Ovcharova, N. Y. (2014), "FEM Analysis of Cylindrical Structural Elements under LocalShockLoading", Applied Mechanics and Materials Trans Tech Publications, Switzerland, vol. 566, pp. 499–504, ISSN 1662-7482,doi: 10.4028.
