微肋薄膜减阻的实验研究

作者根据湍流附面层结构新的解释及非光滑特殊造型表面可以减小流体阻力的事实 ,作者研制了微肋条减阻薄膜 ,贴在赛船上参加比赛 ,获得好成绩[1、2 ] 。作者在风洞中做了贴及不贴微肋薄膜平板试验对比。结果贴微肋薄膜可减阻约 7%。

电磁自动平衡式智能测力仪

In wind tunnel measurement of surface drag a force meter with high sensitivity and accuracy is urgently needed.This paper reports the development of the automatically balancing force meter which is a new device not yet seen before.The design principle,software and hardware,and the application of this meter are presented in this paper.Its accuracy is 0 5%,repetition 0 1%,responce time 5ms,sampling period 100μs.