Maravilla H. Improving the accuracy of determining the heat transfer boundary conditions for monitoring the turbine blades lifetime of aircraft gas turbine engines

Object - workflow of gas turbine engines, thermal stress state and rotor blades lifetime; goal - improvement of heat transfer boundary conditions determination for monitoring the turbine blades lifetime of aircraft gas turbine engines; methods - mathematical apparatus of thermodynamics, theory of jet engines and theory of similarity for the study of the relationships between the engine working parameters and determine these parameters in different conditions, finite element analysis for the determination of thermal stress state of the blade, structural and parametric methods of identification, simulation; results - improvement of heat transfer boundary conditions determination for monitoring the turbine blades lifetime of aircraft turbine engines; novelty - a method to develop mathematical models based on the use of thermodynamics equations for the monitoring the unmeasurable engine parameters was proposed for the first time, which ensures the stability of these models during changes in the technical condition of the engine's gas path and improve the accuracy of determining the heat transfer boundary conditions on the rotor blades, the method of monitoring the lifetime of turbine blades was improved, the proposed method differs from the previously known mathematical models, the models developed by the proposed method provide an increment in the accuracy of determining the thermal stress state and due to this - the reliability of determining the lifetime, further analysis of errors during the monitoring of the turbine rotor blades lifetime taking into account the influence changes in the gas-path technical condition was obtained, which improves the accuracy of the results of the analysis of errors; implementation degree - two introduction acts; industry - propulsion engineering.