Posted by showcrop on January 28, 2018 at 05:04:33 from (75.68.37.174):
In Reply to: Combustion Talk posted by David G on January 27, 2018 at 10:14:58:
In the fire service they drill the need for Stoichiometric fuel air mixture into you when training on flammable liquid and gas fires. You can't have fire if there is too much fuel in the mix or too little. I have long wondered about competition engine builders and the work that they do on cylinder heads and piston lands. For example many heads come with eyebrows around the valves, and it is common practice to cut them down. Is this the right thing to do or is it defeating the mixing and interfering with flame front? Then too, diesels usually have specially designed pistons to enhance the swirl of the air as it is compressed so that the fuel gets injected into moving air and mixes faster in order to enhance the flame front. Then an engine builder puts in different pistons to increase or decrease compression depending on what type of puller they are building. What does this do to the flame front?
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