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首页> 外文会议>International Symposium on Air Breathing Engines >Experiments in small gas-turbine combustors with air assisted and airblast atomiser fuel injectors
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Experiments in small gas-turbine combustors with air assisted and airblast atomiser fuel injectors

机译：具有空气辅助和空气涡轮机燃料喷射器的小型气汽轮机燃烧器的实验

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Measurements of velocity, temperature, emissions and droplet characteristics were obtained for two combustor geometries with their respective airblast atomizer and fan sprays fuel injectors at atmospheric pressure, air-fuel ratios and preheat temperatures corresponding to idle, cruise and take-off engine conditions. The performance of the two fuel injectors was also investigated using phase Doppler anemometry on a specially constructed spray rig which allowed the sprays to discharge into quiescent atmospheric air. The results allow comparison of the performance of the airblast atomizer and fan spray fuel injectors under reacting and nonreacting conditions. The airblast atomizer produced better mixing, as indicated by the lower pattern factor found at the exit of this combustor, the lowest value being 0.16 as opposed to 0.27 in the other rig. Both combustors operated at efficiencies of 96 percent or higher with the exception of the lean low preheat case, where a lower efficiency was found. Both fuel injectors were shown to be sensitive to fuel and airflow rates with droplet size increasing with the former and decreasing with the latter. The effect of combustion was to significantly increase droplet velocities but prereaction droplet diameters were not significantly changed. Interaction of the primary zone flow with the spray caused skewing of the fan spray droplet distribution.
机译：用于与它们各自的鼓风雾化器和在大气压下，空气 - 燃料比和对应于空闲，巡航和起飞发动机条件预热温度风扇喷雾的燃料喷射器2件的燃烧器的几何形状，得到的速度，温度，排放和液滴的特性的测量。两个燃料喷射器的性能，使用在其上允许的喷雾剂排放到静态大气空气在专门构造的喷雾钻机相多普勒测速了研究。结果允许下反应和非反应条件下鼓风雾化器和扇形喷雾的燃料喷射器的性能的比较。所述鼓风雾化器产生更好的混合，由下部图案因子所指示的发现在这个燃烧器的出口处，最低值是0.16如在其它钻机反对0.27。两个燃烧器在与贫低预热的情况下，其中较低效率为除外96％或更高的效率操作。这两种燃料喷射器被证明是与前者液滴尺寸增加，后者减少燃料和空气流速敏感。燃烧的效果是显著增加液滴的速度，但预反应液滴直径不显著改变。与喷雾主要区域流的相互作用引起的所述风扇的偏斜喷雾液滴分布。

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