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![]() "Friedrich Ostertag" wrote in message ... Hi Mr. Tarver, Diesel engines cannot "detonate". The term "detonation" applies to preignition of part of the charge before ignition or before the flamefront has reached that portion of the charge. Detonation refers to more energy being imparted to the fuel air mixture by compression heating than can be absorbed without igniting the fuel. On a diesel, the fuel is not there until the very moment when it is supposed to ignite. You cannot ignite pure air, no matter how much energy you impart on it. In a turbine engine what you write is true, but you are going to have to educate me as to the process further to make me believe. What exactly is it you don't understand? You surely are aware, that a diesel engine will intake pure air, compress it (much further than a gasoline engine compresses the mixture - temperatures get really hot just from the adiabatic compression), and then injects the fuel into the compressed (and hot!) air, where it immediately ignites due to the high temperature of the compressed air. Thus my comment, that the fuel cannot preignite, as it is not there prior to the time it is supposed to ignite. No preignition - no detonation. So then a diesel engine is like a turbojet? Are the two stroke diesels the same as the 4 stroke version in this? |
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