流体压强演示装置

Demonstrating device of fluid pressure

人教版"流体压强与流速关系"一节中,按教材提供的方法实验时实验现象不明显,且不容易操作成功,还容易误导学生.为此利用简易材料自制了流体压强演示仪,通过U型管中液柱高低呈现出压强的大小,通过发烟装置直观显示出空气的流动,再利用长气球供气,延长了演示实验时间,避免了烟气对人的伤害.

The demonstrating experiment of the relation between fluid pressure and flow speed in teaching material is not easy to operate,but easy to mislead students,its phenomenon is not obvious.So a demonstrating device of fluid pressure was made.This device had three improvements.Firstly,the pressure was adjusted through the height of the liquid in the U tube.Secondly,by using fuming device,air flowing was observed obviously.Finally,using long balloon to blow fuming device,the time of the demonstration experiment was extended,and avoided the smoke injury to persons.