Zelenskyi R. Precision improvement of the turbine engine dynamic performances determination considering the structural elements heating

Object - transients in gas turbine engine; goal - improvement of gas turbine engine dynamic performances determination by the consideration of the engine elements heating degree; methods -methods from an air-breathing engine theory for working process dynamics simulation, finite element methods to form thermal and stress-state models of structural elements, structural and parametric identification, service simulation, experimental testing of gas turbine engines; results - improvement of gas turbine engine dynamic performances determination by the consideration of the engine elements heating degree; novelty - a method to consider variable thermal state of the structural elements using the transient characteristics of structural elements deformation in the nonlinear dynamic model of the gas turbine engine working process was proposed for the first time, the method improves the accuracy of the dynamic characteristics of gas turbine engines, a method to determine the parameters of a linear gas turbine engine dynamic model using certain parameters of the prototype-engine model based on physical similarity of engines was developed for the first time; that provides a simplified description of the models of gas turbine engines taking into account a heating of structural elements, a thermal gas-dynamic model of gas turbine engine was significantly improved by integrating workflow process model with dynamic models of structural elements deformation, which are represented by transient characteristics, this allows to take into account the heating of structural elements in the transient operation of the engine, a method to determine multi-mode static and dynamic characteristics of thermal and stress state of parts gets further development; this method is based on high-level finite-element models applied to the analysis of the radial displacements of structural elements, which makes it possible to increase the accuracy of the description of the dynamics of radial clearance in turbomachinery; implementation degree - five introduction acts, industry - propulsion engineering.