Type 052C/052D Class Destroyers


Bltizo

Lieutenant General
Staff member
Super Moderator
Registered Member
Okay gents, I think the guy's learned his lesson, let's settle down.

To answer his question for those who are genuinely interested -- in this case, if the ship is proceeding for a sea trial after a period of fitting out, the engines will initially expel some darker smoke because the engines haven't been running for a bit.

This is not uncommon for many ships if they've been at port for a bit, regardless of navy.
 

dankris

Junior Member
Registered Member
Okay gents, I think the guy's learned his lesson, let's settle down.

To answer his question for those who are genuinely interested -- in this case, if the ship is proceeding for a sea trial after a period of fitting out, the engines will initially expel some darker smoke because the engines haven't been running for a bit.
This is not uncommon for many ships if they've been at port for a bit, regardless of navy.
this is slightly off-topic, but continuing from the explanation, is the black smoke caused by the leftover fuel in the engine, making the combustion ratio/mixture less than ideal and thus the black smoke?
 

by78

Brigadier
this is slightly off-topic, but continuing from the explanation, is the black smoke caused by the leftover fuel in the engine, making the combustion ratio/mixture less than ideal and thus the black smoke?

Could be a rich fuel mixture upon engine startup, which is quite common for all types of engines. The smoke goes away after the mixture becomes optimal.

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Tam

Colonel
Registered Member
I'm sorry but I asked because I don't know?


When an engine is from stop and starting to accelerate, the digitally controlled fuel injection system would spray a slightly richer fuel mixture. This means that initially, fuel combustion becomes incomplete, until the engine picks up the speed, the intake air rushes faster to deliver enough oxygen and the combustion curve catches up with the richer fuel mixture till it reaches optimum.
 

Hendrik_2000

Brigadier
When an engine is from stop and starting to accelerate, the digitally controlled fuel injection system would spray a slightly richer fuel mixture. This means that initially, fuel combustion becomes incomplete, until the engine picks up the speed, the intake air rushes faster to deliver enough oxygen and the combustion curve catches up with the richer fuel mixture till it reaches optimum.
Also the engine get hotter promoting better combustion because the fuel atomizer is now vaporized more complete
 

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