Drag and lift reduction of a 3D bluff body using flaps

被引:128
作者
Beaudoin, Jean-Francois [1 ]
Aider, Jean-Luc [1 ]
机构
[1] PSA Peugeot Citroen, Res & Innovat Dept, F-78943 Velizy Villacoublay, FR, France
关键词
D O I
10.1007/s00348-007-0392-1
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
We present an experimental study on flow control over a classic 3D bluff-body used in automotive aerodynamics (Ahmed 1983). Flow control is achieved through moving flaps fixed on every edge around the two rear flat surfaces of the model. Different pairs of flaps, with variable angle compared to the walls, are tested. Parametric studies show that the most efficient configuration for the flaps is along the side edges of the rear slant, i.e. in the region where longitudinal vortices are created, and also at the junction between the roof and the rear slant, where the flow separates. We also explore the combinations of different flap configurations. We find interesting results showing cumulative effects between some configurations leading to -25% drag reduction and -105% lift reduction. Finally, particle image velocimetry measurements show that one of the key effects is the control of the longitudinal vortices created at the side edges of the rear slant.
引用
收藏
页码:491 / 501
页数:11
相关论文
共 19 条
[1]   INFLUENCE OF BASE SLANT ON THE WAKE STRUCTURE AND DRAG OF ROAD VEHICLES [J].
AHMED, SR .
JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME, 1983, 105 (04) :429-434
[2]  
Ahmed SR., 1984, SAE TECHNICAL PAPERS
[3]  
AIDER JL, 2001, 2001010627 SAE
[4]   Cavitation as a complementary tool for automotive aerodynamics [J].
Beaudoin, JF ;
Cadot, O ;
Aider, JL ;
Gosse, K ;
Paranthoën, P ;
Hamelin, B ;
Tissier, M ;
Allano, D ;
Mutabazi, I ;
Gonzales, M ;
Wesfreid, JE .
EXPERIMENTS IN FLUIDS, 2004, 37 (05) :763-768
[5]   ACTIVE TURBULENCE CONTROL FOR DRAG REDUCTION IN WALL-BOUNDED FLOWS [J].
CHOI, H ;
MOIN, P ;
KIM, J .
JOURNAL OF FLUID MECHANICS, 1994, 262 :75-110
[6]  
Drouin V, 2002, P BLUFF BOD WAK VORT
[7]  
Duell EG., 1999, SAE paper 1999-01-0812
[8]   SEPARATION CONTROL - REVIEW [J].
GADELHAK, M ;
BUSHNELL, DM .
JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME, 1991, 113 (01) :5-30
[9]   The control of flow separation by periodic excitation [J].
Greenblatt, D ;
Wygnanski, IJ .
PROGRESS IN AEROSPACE SCIENCES, 2000, 36 (07) :487-545
[10]  
Hucho W.-H., 1998, AERODYNAMICS ROAD VE, VFourth