槽道湍流减阻次优控制方案研究  

STUDY ON SUBOPTIMAL CONTROL SCHEMES FOR SKIN-FRICTION REDUCTION IN TURBULENT CHANNEL FLOW

作　　者：杨歌[1] 许春晓[1] 崔桂香[1] 

机构地区：[1]清华大学航天航空学院工程力学系,北京100084

出　　处：《力学学报》2010年第5期818-829,共12页Chinese Journal of Theoretical and Applied Mechanics

基　　金：国家自然科学基金资助项目(10772098;10925210)~~

摘　　要：利用槽道湍流的直接数值模拟,对基于壁面摩擦力信息的次优控制减阻方案进行了研究.采用连续壁面吹吸控制和模拟的壁面智能凹坑控制作为致动方式,对不同的次优控制方案的减阻效果进行了分析和评价,优选得到了更为简单实用的减阻控制方案.The suboptimal control schemes based on wall skin-friction information for turbulent drag reduction have been studied by using direct numerical simulations of turbulent channel flow.Actuated by the continuous blowing-suction and the approximated active dimples at the wall,the effect of the skin-friction reduction by different control schemes has been evaluated and analyzed,respectively.A more simple and practical control scheme has been proposed.

关 键 词：湍流 减阻 次优控制 直接数值模拟 凹坑 

分 类 号：O357.5[理学—流体力学]