小形噴霧燃焼器の研究 : 第2報,燃焼特性の評価

概要

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For the development of a new combustion-type heater, atomization of a liquid fuel and flame holding on a small-scale spray combustor were studied experimentally. In this paper, the combustion characteristics of a swirl combustor with two-step expansions are investigated in terms of stability limits, exhaust has emissions and temperature distribution. Main results are as follows: (1) The region of stable burning in the plain-jet nozzle with swirling blast air (nozzle B) is wider than that in the nonswirling airblast nozzle (nozzle A). (2) Some of the unburned fuel droplets are exhausted in the case of nozzle A. (3) The flame length in the case of nozzle B is shorter than that in the case of nozzle A. (4) In a small flow rate from 0.01 g/s to 0.1 g/s, the combinations of swirling flows and step expansions were found to be effective in stabilizing the flame.
社団法人日本機械学会の論文
1989-09-25