Flutter boundaries for pairs of low pressure turbine blades

被引：0
|
作者：
Corral, R [1 ]
Cerezal, N
Vasco, C
机构：
[1] Ind Turbopropulsores SA, Parque Empresarial San Fernando, Madrid 28830, Spain
[2] Sch Aeronaut, Madrid 28040, Spain
来源：
UNSTEADY AERODYNAMICS, AEROACOUSTICS AND AEROELASTICITY OF TURBOMACHINES | 2006年
关键词：
flutter; low pressure turbine; stability map;
D O I：
10.1007/1-4020-4605-7_1
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
The aerodynamic damping of a modern LPT airfoil is compared to the one obtained when pairs of blades are forced to vibrate as a rigid body to mimic the dynamics of welded-pair assemblies. The stabilizing effect of this configuration is shown by means of two-dimensional simulations. The modal characteristics of three bladed-disk models that differ just in the boundary conditions of the shroud are compared. These models are representative of cantilever, interlock and welded-pair designs of rotating parts. The differences in terms of frequency and mode-shape of the three models are sketched. Finally their relative merits from a flutter point of view are discussed using the 2D aerodynamic damping characteristics.
引用
收藏
页码：3 / +
页数：3
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