炭化水素燃焼成分ガス濃度の空気過剰率による影響

抄録

This paper describes the theoretical study of the effects of the excess air ratio on the gas-ingredient concentration of dry products made by hydrocarbon fuel combustion. The author attempts to employ solid figures, and the ingredient concentration can be expressed in the form of a performance surface with regard to the burning rate of carbon or hydrogen, fuel com position and the excess air ratio. When the previous considerations are applied to this surface, a similar trend can also be revealed owing to the excess air variation. In general, the concentration surface of oxygen, nitrogen, or other produced gases gradually approaches the rich or weak limit plane, as the excess air ratio increases. The particular lines which are independent of the excess air ratio lie on the nitrogen-specified plane. That is to say, with variation of feed air, the nitrogen concentration surfaces turn on these lines as their rotating axes. Therefore, it should be noted that, on the side of a complete combustion zone, nitrogen concentration decreases, as the excess air ratio increases. In the case of the carbon educed, this tendency is evidently observed in the isosceles prismatic figures. When supply air quantity is scarce, the combustion performance is unexpectedly deteriorated, in case the method "B" is employed. When the excess air ratio is less than one, the concentration surface forms can markedly affect the particular line of nitrogen, and the length included in these surfaces depends upon the value of the excess air ratio.