METHOD OF DETERMINING DIMENSIONAL PARAMETERS OF GAS TURBINE ENGINE Russian patent published in 2019 - IPC F01D11/14 G01B21/04 G01B21/22 

FIELD: machine building.

SUBSTANCE: invention relates to a method of determining dimensional parameters of a gas turbine engine, comprising a housing and a disc, on which at least one blade is fixed, wherein said housing surrounds the disc and said at least one blade, said disc being driven by the shaft to rotate about an axis called the axis z of the gas turbine engine. Method includes: obtaining (E1) coordinates (P) of the ends of the leading edge and the trailing edge of the blade in a coordinate system associated with the disc; expression (E2) of coordinates (P') of the ends of the leading edge and trailing edge of the blade in a coordinate system associated with the housing; calculating (E3) distance (g) between the body and the ends of the leading edge and the trailing edge of the blade based on coordinates (P'), expressed in a coordinate system associated with the body; calculating (E4) contact pressures between the vane and the body along the blade end based on the calculated distance (g); calculation (E5) of forces and reaction moments appearing as a result of contact between blade and housing, based on calculated pressures; determining the gas turbine engine size parameters (E6) depending on the calculated distances, pressures, forces and moments. Also disclosed is a device for determining dimensional parameters of a gas turbine engine, comprising data processing means.

EFFECT: invention makes it possible to determine size parameters of a gas-turbine engine using accurate calculation of capabilities of contacts and corresponding reactions without resorting to thin and expensive local modelling, such as three-dimensional modelling using the finite element method.

11 cl, 13 dwg