B-2 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が与える影響(燃焼I,一般講演)

概要

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The effects of ambient pressure (p_a) on spray characteristics of an aero-engine airblast fuel injector were researched. The ambient pressure was changed from 0.10 to 0.82MPa. Laser sheet visualization and phase Doppler anemometry (PDA) were employed for spray characterization. As pu increased, the spray pattern changed from cone shape to bell shape. For a fixed mass fuel flow rate at mf=0.78g/s, an exponent of p_a in the expression of p_a - SMD correlation by a simple power-law did not change significantly through the whole range of p_a examined. In contrast, for fixed air-to-fuel mass flow rate ratio AFR=14.2, an exponent was relatively larger in the low p_a range whereas it was smaller in the high p_a range. The expression of p_a - SMD correlation by a simple power-law for wide range of p_a may be difficult for a constant AFR.
公益社団法人日本ガスタービン学会の論文
2008-10-01