Name: 提升：伯努利原理（物體如何飛行演示） (Lift: Bernoulli’s Principle (How Things Fly Demonstration))
Uploaded: 2025-08-26T11:06:11.000Z
Duration: 2 min 13 s

未來簡單式

I'm an explainer at the National Air and Space Museum's How Things Fly Gallery and today I'm going to talk to you about lift.

我是美國國家航空航天博物館 "如何飛行 "展廳的講解員，今天我要和大家談談升力。

現在進行式

I'm standing in front of the Spirit of St.

It was flown in 1927 by Charles Lindbergh and it was the first successful solo flight over the Atlantic Ocean.

它由查爾斯-林德伯格於 1927 年駕駛，是首次成功飛越大西洋的單人飛行。

Now how was this plane able to generate lift?

這架飛機是如何產生升力的呢？

Now I can explain that using this airfoil here.

現在，我可以用這個機翼來解釋一下。

An airfoil is like a cutout or a cross section of a wing.

翼面就像機翼的切口或橫截面。

So if I were to take a wing and slice it into pieces like a loaf of bread, this would be one slice of the wing.

是以，如果我把雞翅像切面包一樣切成一片一片的，這就是雞翅的一片。

Now if we compare this airfoil to the Spirit of St.

現在，如果我們將這一機翼與聖靈號進行比較

Louis, you'll notice they have very similar shapes.

路易斯，你會發現它們的形狀非常相似。

它們的頂部是弧形的，底部是平的。

An airplane's wing will be shaped this way because of something called Bernoulli's principle.

飛機機翼的形狀之所以如此，是因為伯努利原理。

Daniel Bernoulli was a Swiss mathematician who studied the movement of fluids like air and water and he realized that a faster moving fluid will have a lower pressure while a slower moving fluid has a higher pressure.

丹尼爾-伯努利是瑞士數學家，他對空氣和水等流體的運動進行了研究，並認識到運動速度越快的流體壓力越低，而運動速度越慢的流體壓力越高。

Now let's apply this to our airfoil or to a wing so that when the plane starts flying and air hits the wing, you're going to get faster moving air on top.

現在，讓我們把它應用到我們的翼面或機翼上，這樣當飛機開始飛行，空氣撞擊機翼時，上面就會有移動更快的空氣。

It's going to speed up because of the curve.

由於曲線的存在，速度會加快。

At the bottom where it's flat, you're going to have a slower moving air.

在底部平坦的地方，空氣流動較慢。

It's not going to be as fast as the air on top.

That slower air is high air pressure and the faster air is low air pressure.

速度慢的空氣氣壓高，速度快的空氣氣壓低。

That high air pressure pushes up on the airfoil or up on the wing and that's why something as heavy as an airplane can fly.

高氣壓推動翼面或機翼上升，這就是像飛機這樣沉重的物體能夠飛行的原因。

Well I have an experiment we all can try at home with a single sheet of paper.

我有一個實驗，大家可以在家裡用一張紙嘗試一下。

If I were to place this paper beneath my lips and blow, would it go up or would it go down?

如果我把這張紙放在嘴脣下面吹氣，它會上升還是下降？

We notice that the paper goes up and the reason why is because of Bernoulli's principle.

我們注意到紙張在上升，原因就在於伯努利原理。

When I blew my fast air on top of the sheet of paper, it was a lower pressure than all the air in the room because the air in the room is slower than the air that I was blowing.

當我把我的快速空氣吹到紙上時，它的壓力比房間裡所有空氣的壓力都低，因為房間裡的空氣比我吹的空氣慢。

So that high air pressure works from beneath and it pushes up on our sheet of paper and the same thing is happening to an airplane's wing and that's why something as heavy as an airplane like the Spirit of St.

是以，高氣壓從下面產生作用，把我們的紙推上去，同樣的事情也發生在飛機的機翼上，這就是為什麼像 "聖靈號 "這樣沉重的飛機也能在空中飛行的原因。