Features GTE blade disk natural frequencies and shapes calculations with regard to flutter problem solution

Aerospace propulsion engineering


Аuthors

Firsanov V. V.1*, Makarov P. V.2**

1. Moscow Aviation Institute (National Research University), 4, Volokolamskoe shosse, Moscow, А-80, GSP-3, 125993, Russia
2. Gas turbine engineering research and production center Salyut, 16, Budennogo av., Moscow, 105118, Russia

*e-mail: k906@mai.ru
**e-mail: kbpr@salut.ru

Abstract

Description of the features of modal analysis compressor blade disk is considered. It is shown that the change of natural frequencies and modes of compressor blade is determined with number of nodal diame-ters, disk flexibility and interaction between blades shrouds. It is illustrated, that calculation of the natural frequencies and mode of whole rotor it is necessary in order to get correct result. The practice recommen-dation to development suitable finite-element models of rotor and blade disk is represented. Features pic-ture of displacement of modern fan wide chord blade hesitant with natural mode with regard to flutter prediction is considered.

Keywords:

flutter, stability, blade disk, blade, nodal diameter, fun.


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