Evaluation of the unsteady RANS capabilities for separated flows control

被引：16

作者：

Garnier, E. ^{[1
]}

Pamart, P. Y. ^{[1
]}

Dandois, J. ^{[1
]}

Sagaut, P. ^{[2
]}

机构：

[1] Off Natl Etud & Rech Aerosp, Appl Aerodynam Dept, F-92190 Meudon, France

[2] IJLRA UPMC, F-75252 Paris 5, France

来源：

COMPUTERS & FLUIDS | 2012年 / 61卷

关键词：

Flow control; Synthetic jet; LES; URANS; LARGE-EDDY SIMULATION; SYNTHETIC JETS; EQUATION; MODEL;

D O I：

10.1016/j.compfluid.2011.08.016

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

Nowadays, unsteady RANS methods are the only techniques usable in the industry to design a control device based on a periodic excitation of the flow. This paper aims at evaluating the potential of such methods by comparing their performances with respect to LES computations taken as a reference. The chosen test case is a rounded backward facing step proposed by Dandois et al. [1]. The frequency response of this flow to the periodic excitation of a synthetic jet is computed both with LES and with four different URANS models. It is demonstrated that the optimal frequency identified by best URANS models is close to the one of LES. Nevertheless, the amplitude of separated bubble surface reduction is underestimated by URANS models. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：39 / 45

页数：7