Tehnički vjesnik, Vol. 31 No. 2, 2024.
Izvorni znanstveni članak
https://doi.org/10.17559/TV-20230628000770
The Modern Single Shaft Gas Turbine Rotor Stress-Strain State Determination Taking into Account the Contact Thermoelasticity Problem
Natalia Smetankina
; Department of Vibration and Thermostability Studies, Anatolii Pidhornyi Institute of Mechanical Engineering Problems of the National Academy of Sciences of Ukraine, 2/4 Dmytra Pozharskogo Street, Kharkiv, Ukraine
Serhii Morhun
; Department of Engineering Mechanics and Technology of Machinebuilding, Admiral Makarov National University of Shipbuilding, 9 Heroiv Ukrainy Avenue, Mykolaiv, Ukraine
Sažetak
The paper outlines a finite elements refined mathematical model of the stress-strain state of single shaft gas turbine engine that can be used in ground or floating power plants. The mathematical model, built on the basis of special contact finite elements takes into consideration the contact thermoelasticity problem in the joint area of disk and blades. On the basis of the developed mathematical model the fields of turbine rotor dynamic stresses and displacement have been found too. To make the clear decision about the developed mathematical model adequacy mostly loaded impeller dynamic stresses field has been found and verified by comparison with the calculated results without contact and experimental data. The divergence between the calculated data and experimental results is less than 8%. The turbine rotor displacements and dynamic stresses have been found for different forced vibration modes for the wide range of harmonic indexes changing from 0 to 4. The obtained results along with the previous studies of this rotor fluid flow and thermal state could be used in further studies of the turbine rotor creep and fatigue strength and blades crack researches.
Ključne riječi
contact thermoelasticity problem; dynamic stresses field; experimental verification; finite elements method; gas turbine rotor
Hrčak ID:
314846
URI
Datum izdavanja:
29.2.2024.
Posjeta: 138 *