It is always said that, smaller the droplet size, better is the mixing efficiency, and hence more efficient is the combustion as well. But literature says, there is certain limit on the minimum size of the droplet. Why is that constraint?
if possible, can you tell me what is the minimum and maximum size of the droplet that is encountered in combustion process.
In fact the limitation for droplet size is for large droplet < 50 µm higher the risk is to broke the droplets and increase the combustion surface leading to instability
The same risk of HF instability is existing for droplet size < 20µm ( high combustion surface )despite high combustion efficiency
In my opinion to avoid issue is to produce high scattered droplet sizes : look to the Russian injector pattern
My experience in atomization and sprays shows that there are limits when an array of droplets in the air begins to behave as a kind of «mini cloud».
When droplets of relatively large(>5micron)/// the every droplet is freely blown by air and evaporates easily - the Gas Oil(fuel) Mixture is forming.
When droplets are fine (
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