Rotor-stator nodal diameter mode interaction by means of contact in an aircraft engine

Mathias Legrand, Ludovic Idoux, Christophe Pierre, Patrice Cartraud

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In modern turbo machines such as aircraft jet engines, contact between the casing and bladed disk may occur through a variety of mechanisms. In the present work, we focus on a very specific interaction phenomenon due to contact leading to a travelling wave speed coincidence between nodal diameter modes of the two structures to occur. Simple two-dimensional models of the casing and bladed disk are introduced. Each structure is represented in terms of its two k-nodal diameter vibration modes, which are characteristic of axi-symmetric structures and allow for travelling wave motions which are of interest. Equations of motion are solved using an explicit time integration scheme in conjunction with the Lagrange multiplier method where friction is considered. It is pointed out that the theory involving very simple geometrical statements does not accurately predict the phenomenon.

Original languageEnglish
Title of host publicationProceedings of the 11th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC-11
Pages602-611
Number of pages10
StatePublished - 2006
Event11th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC-11 - Honolulu, HI, United States
Duration: 26 Feb 20062 Mar 2006

Publication series

NameProceedings of the 11th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC-11
Volume2

Conference

Conference11th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC-11
Country/TerritoryUnited States
CityHonolulu, HI
Period26/02/062/03/06

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