高負荷旋回流燃焼器の噴霧燃焼特性に関する研究 : 第2報,二段燃焼によるNO_x低減効果

概要

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NO_x reduction effects by two-stage spray combustion in a high intensity swirl combustor have been investigated using kerosene with a pyridine content of 0-1.7%. The secondary air was radially injected into the combustion chamber through a multiholed tube, which was axially inserted from the rear side of a cylindrical combustor. Experiments have been carried out varying a secondary air injection point, a primary to secondary air ratio, pyridine content and a fuel flow rate. The main experimental results are as follows: (1) by the effective mixing of a fine fuel spray with an air flow of a large swirl degree in the primary combustion zone and by suitable supply of the secondary air, combustion of low NO_x emission can be realized even in a high intensity combustor. (2) The injection of the secondary air at a point where the primary combustion is almost completed is effective for reducing NO_x emission. (3) A primary to secondary air ratio for low NO_x emission has a tendency to increase with a decrease of combustion intensity.
一般社団法人日本機械学会の論文
1986-09-25