旋回流燃焼器の燃焼特性に及ぼす噴霧ノズルの影響

概要

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Flow patterns in a swirl flow combustor, combustion processes and flame stabilities were experimentally investigated with two types of internally mixed twin-fluid atomizers, slit nozzles and multi hole nozzles, and conventional hollow-cone nozzles. The results show that, (1)twin-fluid atomizers can realize high-intensity spray combustion at high-velocity spray flow in comparison with a hollow-cone nozzle, due to intense mixing of spray with air and recirculating hot gas, but at small air-swirl degrees or with a small recirculation zone, flame stability becomes worse with the increase of flame length, (2) spray of slit nozzles has a deflating tendency at ordinary spray angles, but can extend a narrow recirculation zone at large spray angles, which is effective in expansion of the flame stability region. Multi hole nozzles are preferable to maintain a constant spray angle and significant penetration.
一般社団法人日本機械学会の論文
1993-08-25