TY - JOUR
AU - Morhun, S. O.
AB - To ensure the required reliability of the developed gas turbine engines, it is necessary to solve several problems in various fields, such as fluid flow dynamics, heat transfer, mechanics of deformable solids, etc. In addition, it should be noted that the results of studying the gas flow parameters and heat transfer between the flow and the rotor are the initial conditions for solving the following mechanical problems. Due to the complexity of the physical processes occurring during the operation of the gas turbine engine rotor, many of these problems have no analytical solution. Numerical methods, particularly the finite element method, are more common, but the mathematical models developed on their basis always require refinement and verification, especially for such complex geometric surfaces as the blade feather. The paper presents a finite-element refined mathematical model of the stress- strain state of the rotor of a single-shaft gas turbine engine that can be used at land-based or floating power plants. The mathematical model is based on special eight-node finite elements of hexagonal type. Based on the developed mathematical model, the fields of dynamic stresses and displacements of the turbine rotor were also found. To make a clear decision about the adequacy of the developed mathematical model, the field of dynamic stresses of the cooled blades of the most loaded impeller of the first stage of the turbine was experimentally tested on special experimental equipment. The displacements of the turbine rotor and dynamic stresses for different frequencies of forced oscillations were found. The spectrum of frequencies of forced oscillations of the rotor was also determined. The obtained results, together with previous studies of the flow in the turbine and the thermal state of the rotor, can be used in further studies of the creep and fatigue strength of turbine blades and rotor disks.
TI - Determination of the Stress-Strain State of the Rotor of an Improved Single-Shaft Gas Turbine Engine
JF - Strength of Materials
DO - 10.1007/s11223-025-00746-9
DA - 2025-01-01
UR - https://www.deepdyve.com/lp/springer-journals/determination-of-the-stress-strain-state-of-the-rotor-of-an-improved-n8vwI4FUt0
SP - 58
EP - 68
VL - 57
IS - 1
DP - DeepDyve
ER -