Large-eddy simulation of flows past a flapping airfoil using immersed boundary method  

作　　者：YANG XiaoLei,HE GuoWei & ZHANG Xing The State Key Laboratory of Nonlinear Mechanics,Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China 

出　　处：《Science China(Physics,Mechanics & Astronomy)》2010年第6期1101-1108,共8页中国科学：物理学、力学、天文学（英文版）

基　　金：was supported by the Chinese Academy of Sciences under the Innovative Project "Multi-scale modeling and simulation in complex systems" (Grant No. KJCX-SW-L08);"Mathematical modeling of complexsystem" (Grant No. KJCX3- SYW-S01);the National Basic Research Program of China (Grant No. 2007CB814803);the National Natural Science Foundation of China (Grant Nos. 10325211,10628206,10732090 and 10872201)

摘　　要：The numerical simulation of flows past flapping foils at moderate Reynolds numbers presents two challenges to computational fluid dynamics: turbulent flows and moving boundaries. The direct forcing immersed boundary(IB) method has been developed to simulate laminar flows. However,its performance in simulating turbulent flows and transitional flows with moving boundaries has not been fully evaluated. In the present work,we use the IB method to simulate fully developed turbulent channel flows and transitional flows past a stationary/plunging SD7003 airfoil. To suppress the non-physical force oscillations in the plunging case,we use the smoothed discrete delta function for interpolation in the IB method. The results of the present work demonstrate that the IB method can be used to simulate turbulent flows and transitional flows with moving boundaries.The numerical simulation of flows past flapping foils at moderate Reynolds numbers presents two challenges to computational fluid dynamics: turbulent flows and moving boundaries. The direct forcing immersed boundary(IB) method has been developed to simulate laminar flows. However,its performance in simulating turbulent flows and transitional flows with moving boundaries has not been fully evaluated. In the present work,we use the IB method to simulate fully developed turbulent channel flows and transitional flows past a stationary/plunging SD7003 airfoil. To suppress the non-physical force oscillations in the plunging case,we use the smoothed discrete delta function for interpolation in the IB method. The results of the present work demonstrate that the IB method can be used to simulate turbulent flows and transitional flows with moving boundaries.

关 键 词：transitional FLOWS moving BOUNDARY immersed BOUNDARY method smoothed discrete DELTA function 

分 类 号：O357.5[理学—流体力学]