If you ever see that professor again, tell him I said:
1. To lower the temperature of combustion, he should introduce atmospheric air into the mixture.
2. If the water is atomised properly, no liquid should be present to get into the cylinders. Unless he's trying to use that gas engine as a steam engine, the water should be
completely atomised until it is dry gas before it goes into the cylinder.
3. Again, the water should be
completely atomised until it is a dry gas before entering the cylinder.
4. Stephen Horvath devised a low wattage electrical circuit to atomise water... in 1976. See Pat. #3,980,053.
5. Again, to lower the temperature of combustion, he should introduce atmospheric air, into the mixture.
I have seen the process of electrolysis on water; I've done it. I used a version of the apparatus described in Pat. # 1,380,183, dated 1921. You'll notice, if you study this patent, that after the water has been separated into hydyogen gas, and oxygen, they are kept in separate tanks until they have gone into the mixing chamber, where thay are blended together with atmospheric air, to make a suitable fuel for an engine. Again, Stephen Horvath devised a low wattage electrical circuit to decompose water into hydrogen and oxygen gasses. See Pat. #3,980,053.
In short, all of the problems that you described are perfectly solveable, by making sure that the water is completely atomised, and the two gasses kept separate until mixed with atmospheric air. Hydrogen and oxygen are both quite explosive, and twentyfold so when mixed as gasses without being diluted with atmospheric air. Believe me; I have a friend who almost killed himself that way.
---Joe