The term rocket science is often used to describe a concept that is quite
difficult to understand
but in this video we are going to explain
The technology behind rockets and rocket engines
in a simplified scientific manner
to keep the rocket moving
you have to eject from at a huge amount of mass at high speed
this is simply Newton's third law of motion
the greater the momentum of the rocket loses
the more force or thrust on the rocket
to eject the high-speed mass form the rocket
a liquid fuel oxidizer mixture is burnt in the rocket combustion chamber
the combustion chamber also helps fuel and oxidizer to mix in an
efficient manner due to its clever mixing design
the high-speed jet is passed through a special a rocket nozzle
the function of the nozzle is to increase the exhaust velocity even further
thus increasing the Rockets thrust
these kinds of nozzles are called converging diverging nozzles
the subsonic flow is converted to a supersonic flow
with the help of such a nozzle
the liquid fuel before entering the combine chamber
travels entirely around the nozzle body
this helps to reduce the nozzles cover temperature
and also results in some energy savings.
to pump the fuel and oxidizer at an adequate flow rate two pumps are used
these pumps are driven by a turbine
which is connected to the same shaft as the pumps
the pump turbine unit is referred to as a turbo pump
A gas generator produces hot gas
which will turn the turbine.
A bypass stream of fuel and an oxidizer
are fed into the gas generator for the purpose of combustion
exhaust from the turbine is mixed with the main rocket exhaust
this unit of the rocket is called the rocket engine
the rocket engine we have discussed
so far is more specifically called a liquid propellant rocket engine
they are the most powerful
and versatile rocket propulsion systems available
The fuel and oxidizer required for
the rocket engines are started to large tanks as shown
during liftoff the thrust produced by the main engine
may not be sufficient
so usually a few solid propellant strap boosters are used to
assist the lift off
you can see more details about solid propellant Rockets here
the rocket starts with zero speed at the ground
but it should accelerate to a final speed of around
28000 kilometers per hour to successfully achieve orbit
the solid propellant strap boosters burned off are very rapidly
so to reduce the way of the rocket they are abandoned after the burn-off
this process known as rocket staging
when the main engine is burned off
is also abandoned and the next engine takes over the charge
in this way the Rockets weight is greatly reduced
thus greater acceleration can be achieved
finally after a few stages of operation
the payload is put into the desired orbit
rocket staging up to 5 has been successfully tested
you might be wondering how the rocket is able to
maneuver itself to reach its destination
the most modern car technique is called cabled thrust
here the rocket nozzle is tilted by high precision devices
it is clear that any deviation from its normal angle
will produce torque which will make the Rockets body turn
after achieving enough to turn the gimbal angle is set to 0
you can see more details of the gibble mechanism here
we hope you've got a nice introduction
on the working of rockets and rocket edges
thank you for watching the video