BASIS OF REQUIREMENTS FOR QUALITY OF ATOMIZATION OF LIQUID FUEL IN HIGH-FORCED FURNACE DEVICES,
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
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To substantiate design requirements for high-pressure jet atomizers of heavy liquid fuels, the effect of the degree of atomization on the combustion efficiency was studied experimentally by burning a diesel fuel and a contact coal coking distillate in a locomotive combustion chamber under various operation conditions idle run, 25, 50, and 100 load. Analysis of the curves obtained for the completeness of combustion n sub z vs the engine load N and vs the degree of atomization x sub O showed that the completeness of combustion for the two fuels increased with increasing load to a value of 0.96-0.98 at a load of 100. All other conditions being equal, the completeness of combustion of the distillate was lower than that of the diesel fuel. This is attributed to the difference in the vaporization constants of the two fuels. The completeness of combustion decreased with increasing diameter of the atomized fuel drops. This dependence was more marked in the case of the distillate than in the case of the diesel fuel. The effect of the degree of atomization on the completeness of combustion decreased with increasing load. The total losses due to incompleteness of combustion connected with mechanical causes poor atomization decreased with increasing load. The process of mixture formation atomization, vaporization, and the burning of drops is the limiting factor in the burning of heavy fuels.
- Combustion and Ignition