Power lossses in air intake 4

[48cmPiston]

Good day mu friends, I am back at en-tips with a new name and I know some can give an idea on this: In our new power plant I inspected the air intake for our engines and I found that the transition from rectangular to round was not well done and also we have internal plates that will cause turbulences. How can I calculate the power losses due to this 2 factors? Check the pictures. The power og each engine is 18 MW and any improvement will be of great help.-

 

[mattsooty]

48cmPiston

Do you know if, for the engines in question, the boost pressure/mass airflow is under closed loop control (via a wastegated etc) turbocharger?

If they are then I would not worry too much about inlet restrictions, unless it is efficiency you are looking for or you are close to the operating limits of your turbochargers and/or intercoolers.

Whilst under closed loop control, for a target boost pressure/mass airflow, the wastegates will be closed more to provide the extra boost to overcome the losses - however, this will move your operating point to the right of the compressor map, towards the choke line. Working the turbos harder and requiring more intercooling and giving a higher intake temp. Not the end of the world but very much dependant upon other boundary conditions, such as combustion noise etc etc.

If, however, there is no closed loop control I would be concerned about exhaust temps & smoke before power loss as, unless the engine was calibrated for that mass airflow/boost pressure you will not be running in the 'as mapped' condition.

MS

 

[ivymike]

I would expect that the change in temps/smoke due to a little restriction would be << the cylinder to cylinder variation on an engine this size. (I wouldn't look at changing an injector until a cylinder was 50C above or 150C below the bank average)

 

[48cmPiston]

@ Matt
What I would expect is efficiency improvement, in this market that could representa a lot of costa savings. Te engines have all controls ya Scad ti a Man control room