实验目的：
1、 认识伯努利原理。
2、研究机翼迎风上升的现象。
实验器材：
机翼模型、鼓风机。
实验过程：
1、将鼓风机电源的插头插入座内，将出风口对着机翼下端，按住开关吹，注意观察。
2、握住把手，边吹边抬起出风口，注意观察。
3、然后，再边吹边降低出风口，注意观察。
探究问题：
1、气流吹机翼的下部，机翼能否被吹起来？
2、气流吹机翼的上部，机翼能否被吹起来？
3、机翼为什么做成流线型？
4、机翼获得向上的力是从哪里来的？
5、机翼获得向上力的大小与气流的流速有关吗？
实验结论与体会：
（以下由学生总结并交流，也可由教师引导得出。）
注意事项：
应将鼓风机出风口缓慢向上抬起。一人操作，其他人员远离仪器并注意观察。
A demonstrator for the rising force of the airfoil
Experimental purpose:
1. Understanding the Bernoulli’s principle
2. Researching the phenomena of the airfoil rising in the wind
Experimental equipment:
The model airfoil, blower
Experimental process:
1.Insert the plug into the electrical outlet, and the wind faces the bottom of the airfoil. Turn on the switch and observe carefully.
2.Hold on the handle. Blow and lift the outlet of the wind. Observe carefully.
3.Then blow and fall the outlet of the wind.
Researching issues:
1.Whether is the airfoil blown up when the airflow blows the bottom of the airfoil?
2.Whether is it blown up when the airflow blows the upper of it?
3.What is the reason that the airfoil is streamline figure?
4.Who brings the force that promotes the airfoil upward?
5.Is there a relationship between the speed of the airflow and the force?
Experimental conclusions and the experience:
The followings can be concluded and discussed by the students, or guided to get by the teachers.
Caution:
Lift the outlet of the wind slowly for the blower. One person does practice, and the others keep away from the instrument.
