A-10 航空エンジン用気流微粒化燃料噴射弁の噴霧特性に雰囲気圧力・旋回気流が与える影響(微粒化・噴霧燃焼,一般講演)

概要

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The effects of ambient pressure (p_a) and swirling airflows on spray characteristics of a counter-swirl aero-engine airblast fuel injector were investigated. The combinations of inner and outer swirl vane angles utilized in the present study were 0/0, -45/20, -45/45 and -45/60deg. The ambient pressure was varied from 0.10 to 0.82MPa. Shadow photography and phase Doppler anemometry (PDA) were employed for the spray characterization. As p_a increased, the spray pattern changed from a cone shape to a bell shape for -45/60deg case. For both a fixed mass fuel flow rate at m_f=0.78g/s, and a fixed air-to-fuel mass flow rate ratio AFR=14.2, SMD decreased as p_a increased for the lower p_a range. However, it did not change significantly for the higher p_a range except the case of 0/0deg and m_f=0.78g/s.
公益社団法人日本ガスタービン学会の論文
2009-10-21