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首页> 外文期刊>Journal of propulsion and power >Improved Semiempirical Correlation to Predict Sauter Mean Diameter for Pressure-Swirl Atomizers
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Improved Semiempirical Correlation to Predict Sauter Mean Diameter for Pressure-Swirl Atomizers

机译：改进的半经验相关性来预测压力旋流雾化器的扫气平均直径

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摘要

The Sauter mean diameter of pressure-swirl atomizers plays a critical role in combustors. The semiempirical correlations are extensively employed in the preliminary combustion design stage to estimate the Sauter mean diameter for combustors. However, few correlations are capable to reflect the effects of geometry on the Sauter mean diameter with satisfied accuracy. In this study, a semiempirical model improved from the surface wave breakup theory was established to predict Sauter mean diameter of pressure-swirl atomizers. Three geometric elements of atomizers, including tangential ports, swirl chamber, and discharge orifice, pose a significant effect on the Sauter mean diameter of pressure-swirl atomizers. The effects of the three geometric elements on Sauter mean diameter are included in the semiempirical correlation. Eighteen different pressure-swirl atomizers were employed in the experiment to verify the established model. Pressure-swirl atomizers are here investigated experimentally at supply pressures up to 12 bar. Water and kerosene were applied in the verification of the model. The uncertainty of prediction on the Sauter mean diameter is less than ±20%. The precision of improved semiempirical correlation was also verified with the experimental results from other literature. The improved semiempirical correlation is proved to be qualified for the optimization of existing pressure-swirl atomizers.
机译：压力旋流式雾化器的苏特平均直径在燃烧室中起关键作用。半经验的相关性在初步燃烧设计阶段被广泛采用，以估计燃烧器的索特平均直径。但是，很少有相关性能够以满意的精度反映几何形状对Sauter平均直径的影响。在这项研究中，建立了从表面波分解理论改进的半经验模型来预测压力旋流雾化器的苏特平均直径。雾化器的三个几何元素，包括切向端口，旋流室和排放孔，对压力旋流式雾化器的Sauter平均直径产生重大影响。这三个几何元素对Sauter平均直径的影响包括在半经验相关中。实验中使用了18种不同的压力旋流雾化器以验证所建立的模型。压力旋流雾化器在最高12 bar的供气压力下进行了实验研究。水和煤油用于模型验证。 Sauter平均直径的预测不确定度小于±20％。其他文献的实验结果也验证了改进的半经验相关性的精度。事实证明，改进的半经验相关性可以优化现有的压力旋流雾化器。

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  • 来源
    《Journal of propulsion and power》 |2014年第6期|1628-1635|共8页
  • 作者

    Xiao Wei; Huang Yong;

  • 作者单位

    National Key Laboratory of Science and Technology on Aero-Engines, Beihang University, 100191 Beijing, People's Republic of China ,Department of Thermal Engineering, School of Energy and Power Engineering;

    National Key Laboratory of Science and Technology on Aero-Engines, Beihang University, 100191 Beijing, People's Republic of China ,Department of Thermal Engineering, School of Energy and Power Engineering;

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