TY - GEN
T1 - Rotor-stator nodal diameter mode interaction by means of contact in an aircraft engine
AU - Legrand, Mathias
AU - Idoux, Ludovic
AU - Pierre, Christophe
AU - Cartraud, Patrice
PY - 2006
Y1 - 2006
N2 - 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.
AB - 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.
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M3 - Conference contribution
AN - SCOPUS:84866944894
SN - 9781604236774
T3 - Proceedings of the 11th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC-11
SP - 602
EP - 611
BT - Proceedings of the 11th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC-11
T2 - 11th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC-11
Y2 - 26 February 2006 through 2 March 2006
ER -