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THE THREE-DIMENSIONAL UNSTEADY BOUNDARY LAYER OVER AN IMPULSIVELY STARTED ROTATING DISK

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【作者】 陈允明；

【Author】 Chen Y. M. (Institute of Mechanics, Chinese Academy of Sciences, Beijing)

【机构】 Institute of Mechanics； Chinese Academy of Sciences； Beijing；

【摘要】 <正> The unsteady boundary layer over an impulsively started rotating disk isstudied,a complete solution describing the smooth transition from vortex diffusionat ωt=0 to Kármán’s steady solution is obtained by series expansion and itsnumerical continuation. The angle of body streamlines,together withexperimental values, are given as the function of time t as well as the momentcoefficient C_M and on-coming velocity w(∞).

【Abstract】 The unsteady boundary layer over an impulsively started rotating disk is studied, a complete solution describing the smooth transition from vortex diffusion at ωt=0 to Karman’s steady solution is obtained by series expansion and its numerical continuation. The angle of body streamlines, together with experimental values, are given as the function of time t as well as the moment coefficient CM and on-coming velocity ω(∞) .

【关键词】 continuation； unsteady； rotating； vortex； OVER； coming； elated； body； describing； parabolic；
  • 【文献出处】 Applied Mathematics and Mechanics(English Edition) ,应用数学和力学(英文版) , 编辑部邮箱 ,1985年10期
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