Reduced-order modeling for unsteady transonic flows around an airfoil

被引：27
|
作者：
Bourgueta, Remi
Braza, Marianna
Dervieux, Alain
机构：
[1] Inst Mecan Fluides Toulouse, F-31400 Toulouse, France
[2] Inst Natl Rech Informat & Automat, F-06902 Sophia Antipolis, France
来源：
PHYSICS OF FLUIDS | 2007年 / 19卷 / 11期
关键词：
PROPER ORTHOGONAL DECOMPOSITION; LOW-DIMENSIONAL MODELS; COHERENT STRUCTURES; COMPRESSIBLE FLOWS; VISCOUS FLOWS; POD; TURBULENCE; CYLINDER; DYNAMICS; TURBOMACHINERY;
D O I：
10.1063/1.2800042
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
High-transonic unsteady flows around an airfoil at zero angle of incidence and moderate Reynolds numbers are characterized by an unsteadiness induced by the von Karman instability and buffet phenomenon interaction. These flows are investigated by means of low-dimensional modeling approaches. Reduced-order dynamical systems based on proper orthogonal decomposition are derived from a Galerkin projection of two-dimensional compressible Navier-Stokes equations. A specific formulation concerning density and pressure is considered. Reduced-order modeling accurately predicts unsteady transonic phenomena. (c) 2007 American Institute of Physics.
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页数：4
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