ANALYSIS OF THE ENGINE OPERATIONAL MODE INFLUENCE AND A SHAPE OF THE DISK ON DYNAMIC CHARACTERISTICS OF ITS RADIAL DISPLACEMENT

R.L. Zelenski, F.F. Sirenko, T.V. Kulik

Influence of the disk shape and gas turbine engine operation mode on dynamic characteristics of radial displacement of controlled points on the disk surface is analyzed. Transient characteristics were obtained as a result of a temperature, heat conduction and exchange coefficients step excitation from cold state to definite mode using finite element method. These dynamic characteristics of radial displacements are needed for making quick computing engine models with glance of a radial clearance change between stator and rotor on transient operational modes.

Key words: transient characteristics, disk, time constant, disk leaf, boundary conditions.