Andre wrote:I think it's the opposite, in a diesel full-load diesel l injection is in a very short time and it is not the lack of air that makes it smokes, but the amount of diesel that must cross a flame front to find a way to find air back
Hello André
there are many older diesel engines whose injection pump has finished injecting to minus 10 ° before the PMH (actual example pump in line: full load injection of minus 24 ° minus 12 ° before PMH) in this case, at -20 ° before PMH, there may not have been a start of combustion yet.
Andre wrote:While at mid speed the engine is softer in function and that the dose of water does not save much on performance.
you mean at half load: in this case, the combustion T ° is undoubtedly lower than the "supposed cracking" T °
To come back to my reasoning,
the heat of vaporization of the water corresponds to approx 537 calories / g:
it makes an extraordinary regulator, for example, when one boils a pot of water: as long as there is water between the noodles, they remain at 100 ° C, after the temperature rise and goodbye the meal
can we transpose the "latent heat of vaporization" liquid water with the "latent heat of cracking" water already in dry steam
if the vaporisation of the liquid water is necessarily under the 374 ° C, (under 220 bar), that means that an excess of water would prevent combustion from exceeding these 374 ° C:
no interest
if the cracking of the water vapor is going to 1500 ° C, it is much more interesting as T ° of regulation of combustion:
and the lost energy of the cracking (less interesting near the PMH) is necessarily recovered well before the exit to the exhaust, since the T ° ech reaches with difficulty the 800 ° C
if too much delay in the injection easily unburned, it would be enough to put more advance, knowing that an injection of steam would prevent the rise in T ° of combustion at the PMH, and automatically maintain the best compromise then:
automatic chart optimization
Does somebody know :
the temperature of cracking of the water according to the pressure
the latent heat of cracking (how many calories / g) in heat equivalent
if the yield is optimized by this principle, I do not take into account the ionizing effect or pantone effect.
is the pantone effect to make the T ° of cracking steam at the right T ° (which may not be in my presentation: taken at random at 1500 ° C)
bolt