Name: 更符合空氣動力學的未來 (A More Aerodynamic Future)
Uploaded: 2021-01-06T18:16:39.000Z
Duration: 8 min 31 s

MAREN：我們已經把太陽能板拆了。

gone under the hood  of a solar race car,

and explored battery technology  in not one, but two episodes.

並對電池技術進行了探討，不是一集，而是兩集。

So now it's time to dig  into an element of design

所以現在是時候挖掘設計的一個元素了

but every vehicle, or really  anything and everything

In this chapter  of our Learning Playlist,

在我們這一章的學習播放列表中。

we're asking,  could today's solar race cars

我們要問的是，今天的太陽能賽車能不能做到？

drive us toward a more  aerodynamic future?

推動我們走向更符合空氣動力學的未來？

But how do you engineer something to be aerodynamic?

但是，你怎麼能把一個東西設計成空氣動力學的？

Now if we take a plane design as an example...

Well, forgive me because I'm [CHUCKLES] not the best artist in the world.

嗯，原諒我，因為我不是世界上最好的藝術家。

say that three times fast, to consider here.

That is the downward force exerted on the object by gravity.

那就是重力對物體施加的向下的力。

The opposing force to that to that is lift.

typically provided by the air underneath the moving object.

通常由運動物體下方的空氣提供。

That's the forward force that moves an object forward

這就是物體向前移動的前向力。

like, in the plane's case, the plane's engines.

像，在飛機的情況下，飛機的發動機。

and that goes in the opposite direction to thrust.

It's the force that resists an object's motion.

同樣的四種力量始終在發揮作用。

This is a 3-D printed model of Black Mamba,

the Stanford Solar Car Project's solar racer

the Stanford team had to account for weight.

斯坦福大學隊必須要考慮到體重。

They wanted to keep the car as light as possible.

他們希望儘可能地保持汽車的輕量化。

Now, the real Black Mamba  tips the scales

現在，真正的黑曼巴給了天平一個提示。

And traction and road grip are also crucial

而牽引力和路面抓地力也是至關重要的。

See, race cars are often  so fast and so light,

你看，賽車往往是那麼快，那麼輕。

they're at risk  of literally taking off.

所以，使用更高、更寬的輪胎。

and specially designed  spoilers or wings

that redirect the air  around the vehicle

to help the vehicle keep  in contact with the road.

It's the power pushing the race car forward.

That's typically generated under the hood

Traditionally, with fossil fuel  powered vehicles,

傳統上，以化石燃料為動力的車輛。

this power output  is measured in horsepower.

這個動力輸出是以馬力為組織、部門的。

But with electric  or battery powered vehicles,

we can also think of it  in terms of kilowatts,

with one kilowatt equaling  roughly 1.34 horsepower.

powered by a 45 amp hour  lithium-ion battery,

which is actually much smaller  and less powerful

事實上，它的體積和功能都要小得多

than what something like  a Tesla uses for its battery.

比像特斯拉這樣的電池使用的東西。

Black Mamba can top out at around 110 kilometers per hour.

黑曼巴最高時速可以達到110公里左右。

pushing against a race car as it drives forward.

在賽車向前行駛的過程中，推著賽車。

you'll probably never have to use this calculation

你可能永遠也用不上這個計算方法了。

unless you're a NASA  or NASCAR engineer.

This complex equation  does give you a sense

這個複雜的方程確實給了你一個感覺

including the all-important  drag coefficient.

The drag coefficient is the number we use

that the object encounters when moving through a fluid.

In this case, our object is our solar race car

在這種情況下，我們的對象是我們的太陽能賽車。

Some other factors that affect drag coefficient

include the object's shape and surface roughness

包括物體的形狀和表面粗糙度。

to reduce friction between the car and the air.

以減少汽車與空氣之間的摩擦。

to make their cars  seamless and slippery.

以使他們的汽車無縫銜接，滑溜溜的。

In an effort to create  a smooth flow of air

字幕列表影片播放

更符合空氣動力學的未來 (A More Aerodynamic Future)

improve

typically

force

straightforward