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首页> 外文期刊>Chemical Engineering & Technology: Industrial Chemistry -Plant Equipment -Process Engineering -Biotechnology >Numerical Study on the Effect of Cavitation on Flow and Diesel Fuel Atomization Characteristics
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Numerical Study on the Effect of Cavitation on Flow and Diesel Fuel Atomization Characteristics

机译：空化对流动和柴油燃料雾化特性影响的数值研究

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摘要

Computational fluid dynamics (CFD) models based on the turbulent mixture multiphase model were applied to consider the effect of cavitation on the spray of diesel fuel. The effects of injection pressure and length-to-width (L/W) ratio on the velocity distribution, cavitation number, discharged coefficient, and nozzle exit velocity were investigated and the performance of the model was compared with the experimental data. The results indicate that the cavitation generated in the nozzle has a strong impact on the fuel injection and spray quality, whereas the L/W ratio is a highly effective parameter for cavitation behavior. In addition, by increasing the L/W ratio, the range of cavitation number, wall friction, and flow resistance increase but in the cavitation region the velocity profile in radial and axial directions, spray cone angle, nozzle exit velocity, and the discharged coefficient decrease.
机译：应用基于湍流混合多相模型的计算流体动力学（CFD）模型来考虑空化对柴油喷雾的影响。研究了注射压力和长宽比对速度分布，气穴数，排出系数和喷嘴出口速度的影响，并将模型的性能与实验数据进行了比较。结果表明，在喷嘴中产生的气蚀对燃料喷射和喷雾质量有很大的影响，而L / W比对于气蚀行为是非常有效的参数。另外，通过增加长宽比，增加了空化数，壁摩擦和流阻的范围，但是在空化区域中，径向和轴向的速度分布，喷锥角，喷嘴出口速度和排出系数减少。

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