Diesel Locomotives unlike electric Locomotives don't need OHE for power because they contain their own power source i.e. the prime mover.
Prime movers are essentially very big diesel internal combustion engines. Consider a normal diesel engine but with very big displacement e.g. 126000 cc and in a V12 or V16 configuration or V8 for shunters like WDS 6(I don't remember)
Above, ALCo 251 V12 diesel engine used in India locos of ALCo origin.
Diesel Locomotives as the name suggests, run on Diesel burning prime movers and like every other internal combustion engine, produce energy in the forms of mechanical, heat and sound energy.
The mechanical energy is used to run an alternator that produces electricity for the traction motors that turn the wheels of the Locomotive.
Above, an Locomotives alternator.
The heat energy is dessipated through the radiator into the atmosphere
The sound that is produced from the combustion is what we here. These sounds are produced due to small scale detonation of diesel under pressure that happens with each combustion cycle. Modern diesel engines come in either 2 or 4 stroke cycles, that means a cycle of combustion is completed when the Piston completes 2 or 4 strokes.
In consumer vehicles, the sound is expelled through the exhaust manifold that leads to the muffler. The muffler contains catalytic converter that reduces the amount of harmful pollutants released into the atmosphere and as the name suggests, it “muffles” or reduces the sound of the engine.
Above, an exhaust muffler.
Diesel Locomotive have straight pipe exhausts that almost don't have any kind of muffling capabilities so therefore diesel Locomotives produce sounds. But this sound is what adds to the charm of the diesel Locomotives. An accelerating ALCo Locomotive is one of the best sounding machines.
Prime movers are essentially very big diesel internal combustion engines. Consider a normal diesel engine but with very big displacement e.g. 126000 cc and in a V12 or V16 configuration or V8 for shunters like WDS 6(I don't remember)
Above, ALCo 251 V12 diesel engine used in India locos of ALCo origin.
Diesel Locomotives as the name suggests, run on Diesel burning prime movers and like every other internal combustion engine, produce energy in the forms of mechanical, heat and sound energy.
The mechanical energy is used to run an alternator that produces electricity for the traction motors that turn the wheels of the Locomotive.
Above, an Locomotives alternator.
The heat energy is dessipated through the radiator into the atmosphere
The sound that is produced from the combustion is what we here. These sounds are produced due to small scale detonation of diesel under pressure that happens with each combustion cycle. Modern diesel engines come in either 2 or 4 stroke cycles, that means a cycle of combustion is completed when the Piston completes 2 or 4 strokes.
In consumer vehicles, the sound is expelled through the exhaust manifold that leads to the muffler. The muffler contains catalytic converter that reduces the amount of harmful pollutants released into the atmosphere and as the name suggests, it “muffles” or reduces the sound of the engine.
Above, an exhaust muffler.
Diesel Locomotive have straight pipe exhausts that almost don't have any kind of muffling capabilities so therefore diesel Locomotives produce sounds. But this sound is what adds to the charm of the diesel Locomotives. An accelerating ALCo Locomotive is one of the best sounding machines.
No comments:
Post a Comment