How does a submarine sink and rise ? Animation

00:03:24
https://www.youtube.com/watch?v=j_NtzdCTtpo

Sintesi

TLDRSubmarines manage their buoyancy and balance using main ballast tanks and trim tanks. The main ballast tank allows for sinking and rising by filling with water or air. Compression of air pushes water out, allowing for ascent. Trim tanks are used for balancing, redistributing water between the front and back of the submarine. Diving planes aid vertical movement when underwater. Care is taken to conserve compressed air, utilizing alternative methods for expelling water as needed.

Punti di forza

  • 🌊 Submarines control buoyancy using ballast tanks.
  • 🚢 Main ballast tank fills with water to sink.
  • 💨 Air is used to rise by expelling water.
  • 🔄 Trim tanks help balance the submarine.
  • 💧 Compressed air is a limited resource.
  • ⚙️ Normal air or diesel fumes can assist ascent.
  • ⛴️ Diving planes aid in movement underwater.
  • 📍 Front and back trim tanks redistribute water.

Linea temporale

  • 00:00:00 - 00:03:24

    The video discusses the mechanisms submarines use to sink and rise, focusing on two types of tanks: the main ballast tanks and trim tanks. The main ballast tank controls buoyancy, allowing the submarine to float when filled with air, or sink when filled with water. Opening a valve lets water in, making the submarine heavier and causing it to sink. To rise, compressed air is pumped into the tank, displacing water and reducing weight. The video emphasizes the importance of conserving compressed air by using normal air or diesel fumes to remove remaining water. The trim tanks aid in balancing the submarine by redistributing water between the front and back as needed. Additionally, diving planes assist in controlling vertical movement while submerged.

Mappa mentale

Video Domande e Risposte

  • What is the main ballast tank used for?

    It controls the submarine's buoyancy by filling with water or air.

  • How do trim tanks help a submarine?

    They balance the submarine by redistributing water between the front and back tanks.

  • What happens when the main ballast tank is filled with water?

    The submarine becomes heavier and sinks.

  • How does a submarine rise after sinking?

    Compressed air is pumped into the ballast tank to displace the water.

  • Why is compressed air a limited resource for submarines?

    It needs to be conserved, which is why normal air or diesel fumes are sometimes used.

  • What are diving planes?

    They help maneuver the submarine up and down while submerged.

  • What happens if the front part of a submarine is heavier?

    Water can be transferred from the front trim tank to the back trim tank for balance.

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Sottotitoli
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Scorrimento automatico:
  • 00:00:00
    Hello,
  • 00:00:01
    today I want to talk about how a submarine can sink and rise.
  • 00:00:09
    Most submarines have two types of tanks,
  • 00:00:12
    the main ballast tank
  • 00:00:13
    and the trim tanks.
  • 00:00:19
    The main ballast tank is used to move the ship up and down.
  • 00:00:32
    The trim tanks are used to balance the ship.
  • 00:00:40
    Let's take a look at the main ballast tank first.
  • 00:00:44
    If the tank is filled with air,
  • 00:00:45
    the submarine is lighter than the surrounding water,
  • 00:00:48
    and it will float on the surface.
  • 00:00:54
    If the tank is filled with water,
  • 00:00:56
    the submarine is heavier than the surrounding water
  • 00:00:59
    and it will sink.
  • 00:01:14
    The main ballast tank has holes on the bottom,
  • 00:01:19
    and a valve on the top.
  • 00:01:22
    As long as the valve is closed,
  • 00:01:25
    the air bubble is trapped in the tank.
  • 00:01:29
    If you open the valve,
  • 00:01:31
    the water pressure is forcing the air out of the tank.
  • 00:01:37
    As there is more and more water getting into the tank,
  • 00:01:40
    the ship is getting heavier
  • 00:01:41
    and its starting to sink.
  • 00:01:46
    If you want the submarine to rise again,
  • 00:01:49
    you need to replace the water with air again.
  • 00:01:53
    To achieve that, compressed air is pumped into the tank.
  • 00:01:59
    The air is pushing the water out of the tank,
  • 00:02:02
    and the ship is getting lighter again.
  • 00:02:07
    As the compressed air is a limited resource,
  • 00:02:10
    you want to waste as little as possible of it.
  • 00:02:13
    Therefor the last bits of water are normally pressed out by normal air,
  • 00:02:17
    or by using the fumes of the diesel engine.
  • 00:02:20
  • 00:02:24
    The second type of tanks are the trimtanks.
  • 00:02:30
    Normally the trim tanks are positioned at the front
  • 00:02:34
    and at the back of the submarine.
  • 00:02:39
    As I mentioned earlier,
  • 00:02:41
    the trim tanks are used to balance the submarine.
  • 00:02:44
    Let's assume the front part of the submarine is heavier than its back.
  • 00:02:51
    In that case, water from the front tank can be pumped to the tank in the back,
  • 00:02:56
    until the ship is in balance again.
  • 00:03:01
    When the submarine is submerged,
  • 00:03:03
    it can also use its diving planes to move up and down.
Tag
  • submarine
  • ballast tank
  • trim tank
  • buoyancy
  • compressed air
  • diving planes
  • balance
  • sinking
  • rising
  • marine engineering