Where does the exhaust go in a steam locomotive?
Where does the exhaust go in a steam locomotive?
As the exhaust is dependent on spent steam leaving the cylinders, provision must be made for exhausting the hot gases, or smoke, when the engineer has the throttle closed. A group of small steam jets called the blower is located in the smokebox for this purpose.
What was the purpose of the steam engine?
Steam engines were used in pumps, locomotive trains and steam ships, and were essential to the Industrial Revolution. They are still used for electrical power generation using a steam turbine. A steam engine needs a boiler to boil water to produce steam under pressure.
How does steam get into a steam locomotive?
After the steam is used in the cylinders, it enters the smokebox via the blast pipe. As the exhaust steam blasts upward toward the stack, it provides draft for the fire by drawing the gases through the flues and into the smokebox. (Fresh air enters the locomotive through open spaces at the base of the firebox.)
How does the draft work in a steam engine?
In a steam locomotive the draft is generally augmented at startup by directing the steam exhaust through the smokestack, which provides a partial vacuum. In a water tube boiler the water is heated in multiple tubes exposed to the hot gases. The tubes are joined to a steam collector chamber at the top.
How does a valve work in a steam engine?
In a steam engine, the movement of the valve ensures that steam is admitted to and exhausted from the cylinder at the right moment. For a typical cylinder that has two ports, the function of the valve is to admit superheated steam at one end while allowing used or exhaust steam to escape at the other.
How does the pressure drop in a steam engine?
At cut-off, the pressure drops as the steam expands and does work to push against the piston. After the exhaust port opens, the line reverses (CD) to indicate the start of the return stroke of the piston. It shows the low pressure as the steam is exhausted.
Which is more efficient a steam engine or an internal combustion engine?
Steam engines, on the other hand, are simpler and more efficient and can use a variety of fuels. Unlike a regular internal combustion engine, which explodes a mixture of fuel and air hundreds of times a second inside its cylinders to drive the pistons, steam engines burn fuel continuously in a different chamber.
How does a gas engine work and how does it work?
This atmospheric engine worked by drawing a mixture of gas and air into a vertical cylinder. When the piston has risen about eight inches, the gas and air mixture is ignited by a small pilot flame burning outside, which forces the piston (which is connected to a toothed rack) upwards, creating a partial vacuum beneath it.
