A lightweight vortex model for unsteady motion of airfoils

被引:1
作者
Dumoulin, Denis [1 ]
Eldredge, Jeff D. [2 ]
Chatelain, Philippe [1 ]
机构
[1] UCLouvain, Inst Mech Mat & Civil Engn, B-1348 Louvain La Neuve, Belgium
[2] Univ Calif Los Angeles, Mech & Aerosp Engn Dept, Los Angeles, CA 90095 USA
基金
欧洲研究理事会;
关键词
vortex shedding; separated flows; wakes; LEADING-EDGE VORTEX; FORCES; AERODYNAMICS; FLIGHT; FLOW;
D O I
10.1017/jfm.2023.997
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
A low-order vortex model has been developed for analysing the unsteady aerodynamics of airfoils. The model employs an infinitely thin vortex sheet in place of the attached boundary layer and a sheet of point vortices for the shed shear layer. The strength and direction of the vortex sheet shed at the airfoil trailing edge are determined by an unsteady Kutta condition. The roll-up of the ambient shear layer is represented by a unique point vortex, which is consistently fed circulation by the last point vortex of the free vortex sheet. The model's dimensionality is reduced by using three tuning parameters to balance representational accuracy and computational efficiency. The performance of the model is evaluated through experiments involving impulsively started and heaving and pitching airfoils. The model accurately captures the dynamics of the development and evolution of the shed vortical structure while requiring minimal computational resources. The validity of the model is confirmed through comparison with experimental force measurements and a baseline unsteady panel method that does not transfer circulation in the free vortex sheet.
引用
收藏
页数:13
相关论文
共 50 条
[41]   UNSTEADY TURBULENT VORTEX STRUCTURE DOWNSTREAM OF A THREE DIMENSIONAL CYLINDER [J].
Aradag, Selin .
ISI BILIMI VE TEKNIGI DERGISI-JOURNAL OF THERMAL SCIENCE AND TECHNOLOGY, 2009, 29 (01) :91-98
[42]   Unsteady aerodynamics of a plunging airfoil in transient motion [J].
Bull, S. ;
Chiereghin, N. ;
Gursul, I ;
Cleaver, D. J. .
JOURNAL OF FLUIDS AND STRUCTURES, 2021, 103
[43]   Robustness of the Leading Edge Vortex on Rotating Wings to Unsteady Perturbations [J].
Jardin, Thierry .
FLOW TURBULENCE AND COMBUSTION, 2022, 109 (01) :27-33
[44]   Parameters influencing vortex growth and detachment on unsteady aerodynamic profiles [J].
Widmann, A. ;
Tropea, C. .
JOURNAL OF FLUID MECHANICS, 2015, 773 :432-459
[45]   UNSTEADY VORTEX INTERACTIONS FOR PERFORMANCE ENHANCEMENT OF A FREE FLYING DRAGONFLY [J].
Hefler, Csaba ;
Noda, Ryusuke ;
Shyy, Wei ;
Qiu, Huihe .
PROCEEDINGS OF THE ASME FLUIDS ENGINEERING DIVISION SUMMER MEETING, 2017, VOL 1C, 2017,
[46]   Steady and unsteady characteristics of circular arc airfoils for water pumping windmills [J].
John, I. H. ;
Wood, D. H. .
JOURNAL OF RENEWABLE AND SUSTAINABLE ENERGY, 2023, 15 (05)
[47]   Unsteady aerodynamic performance of tandem configurations of three flapping and fixed airfoils [J].
Li, Gang ;
Wu, Jianghao ;
Zhang, Yanlai ;
Chen, Long .
AEROSPACE SCIENCE AND TECHNOLOGY, 2025, 160
[48]   Leading-edge vortex dynamics on plunging airfoils and wings [J].
Son, O. ;
Gao, A-K ;
Gursul, I ;
Cantwell, C. D. ;
Wang, Z. ;
Sherwin, S. J. .
JOURNAL OF FLUID MECHANICS, 2022, 940
[49]   STEADY AND UNSTEADY TEMPERATURE MEASUREMENTS IN THE WAKE OF A LINEAR CASCADE WITH HEATED AIRFOILS [J].
Aberle-Kern, Svenja ;
Ripplinger, Thomas ;
Niehuis, Reinhard .
PROCEEDINGS OF THE ASME TURBO EXPO: TURBOMACHINERY TECHNICAL CONFERENCE AND EXPOSITION, VOL 7C, 2020,
[50]   Steady and Unsteady Temperature Measurements in the Wake of a Linear Cascade With Heated Airfoils [J].
Aberle-Kern, Svenja ;
Ripplinger, Thomas ;
Niehuis, Reinhard .
JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME, 2021, 143 (08)