實(shí)驗(yàn)?zāi)康模?/p>
1、 認(rèn)識(shí)伯努利原理。
2、研究機(jī)翼迎風(fēng)上升的現(xiàn)象。
實(shí)驗(yàn)器材：
機(jī)翼模型、鼓風(fēng)機(jī)。
實(shí)驗(yàn)過程：
1、將鼓風(fēng)機(jī)電源的插頭插入座內(nèi)，將出風(fēng)口對(duì)著機(jī)翼下端，按住開關(guān)吹，注意觀察。
2、握住把手，邊吹邊抬起出風(fēng)口，注意觀察。
3、然后，再邊吹邊降低出風(fēng)口，注意觀察。
探究問題：
1、氣流吹機(jī)翼的下部，機(jī)翼能否被吹起來？
2、氣流吹機(jī)翼的上部，機(jī)翼能否被吹起來？
3、機(jī)翼為什么做成流線型？
4、機(jī)翼獲得向上的力是從哪里來的？
5、機(jī)翼獲得向上力的大小與氣流的流速有關(guān)嗎？
實(shí)驗(yàn)結(jié)論與體會(huì)：
（以下由學(xué)生總結(jié)并交流，也可由教師引導(dǎo)得出。）
注意事項(xiàng)：
應(yīng)將鼓風(fēng)機(jī)出風(fēng)口緩慢向上抬起。一人操作，其他人員遠(yuǎn)離儀器并注意觀察。
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.
