首页 | 本学科首页   官方微博 | 高级检索  
     

流线型轴对称钝体尾迹特性及其声激励控制
引用本文:董宇飞,魏中磊. 流线型轴对称钝体尾迹特性及其声激励控制[J]. 力学学报, 1999, 31(6): 682-693. DOI: 10.6052/0459-1879-1999-6-1995-082
作者姓名:董宇飞  魏中磊
作者单位:北京大学湍流国家重点实验室
摘    要:在Re=3.0×103~1.0×105的范围内实验研究了流线型轴对称钝体尾迹特性,并采用声激励手段对尾迹进行控制.研究表明,自然状态下流线型轴对称钝体尾涡无量纲脱落频率在Re=5.0×104~1.0×105的范围内具有普适性,适当频率的声激励可以减小回流区,该结果对工程减阻具有实际应用价值.实验中脉冲热线的成功应用为复杂流场的测量提供了新的技术手段.

关 键 词:尾流 回流区 声激励 流线型 钝体

EXPERIMENTAL INVESTIGATION OF THE WXKE OFAXISYMMETRIC BLUFF BODY AND ITS CONTROLBY MEANS OF ACOUSTIC FORCING~1)
Dong Yufei,Wei Zhonglei. EXPERIMENTAL INVESTIGATION OF THE WXKE OFAXISYMMETRIC BLUFF BODY AND ITS CONTROLBY MEANS OF ACOUSTIC FORCING~1)[J]. chinese journal of theoretical and applied mechanics, 1999, 31(6): 682-693. DOI: 10.6052/0459-1879-1999-6-1995-082
Authors:Dong Yufei  Wei Zhonglei
Abstract:Behaviors of the wake of an axisymmetric bluff body and its control by means ofacoustic forcing have been experimentally investigated for Reynolds numbers ranging from 3.0 χ10~3to 1.0 χ10~5.According to flow visualization, the flow separates at the rear of model, and the evolution ofseparated shear layer finally results in the belieal vortices shedding and forming the reverse flow.The length of recirculation region increases from Re = 3.0 χ 10~3 to Re = 2.0χ10~4, and remains aconstant of X_r/D = 0.975 in Re...
Keywords:wake   recirculation region   acoustic forcing   control
本文献已被 CNKI 维普 等数据库收录!
点击此处可从《力学学报》浏览原始摘要信息
点击此处可从《力学学报》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号