测定不同形状物体空气阻力系数的实验  

The experiment of measurement the air drag coefficient of different shape objects

作　　者：刘扬正[1] 钱仰德[1] 

机构地区：[1]南京工程学院数理部,江苏南京211167

出　　处：《大学物理》2017年第3期16-19,24,共5页College Physics

基　　金：南京工程学院创新基金项目(CKJB201218)资助

摘　　要：设计空气流速连续可调的小型风洞,对圆形平板、圆柱体、流线体的空气阻力系数进行测量.利用U型管中水柱的高度差表达孔板法中空气的流速,通过悬臂梁力传感器测量测试物受到的空气阻力,根据空气阻力和U型管中水柱的高度差的关系测定空气阻力系数.In order to measure the air drag coefficients for the circular plate,the cylinder and the streamline body,a small wind tunnel of adjustable air velocity is designed. The height difference of U type tube in the water column is used to express the air velocity with method of orifice plate through a cantilever beam force sensor measurement air drag of test item. The air drag coefficient is determined according to the air resistance and the difference of the height of the water in U tube.

关 键 词：空气阻力系数 流阻 流速 

分 类 号：O411.3[理学—理论物理] O329[理学—物理]