改进Schnerr-Sauer模型在水翼空化模拟中的评估分析

发布时间：2018-06-14 15:59

本文选题：空化流 + 水翼　；参考：《哈尔滨工程大学学报》2016年07期

【摘要】：为了提高Schnerr-Sauer模型模拟空化流动的能力,基于Rayleigh-Plesset方程和均相流假设建立了一种修正的Schnerr-Sauer空化模型,修正后的模型考虑了湍动能引起的脉动压力和不可凝结气体的影响。联立涡粘度系数修正的SST k-ω湍流模型,对绕二维Clark-Y翼型空化流进行了非定常数值计算,得到了时均化升阻力系数随空化数的变化曲线、云状空化时空泡周期性演变及其水平速度分布规律。通过与已有文献的实验结果对比分析得到,采用修正后的空化模型计算得到的时均化升阻力系数与实验值更为接近,并能较准确地捕捉升阻力系数随空化数的特殊变化规律;修正后的Schnerr-Sauer模型能准确地模拟翼型表面空化云的初生、成长、脱落和溃灭的全过程。本文的研究结果验证了修正后的Schnerr-Sauer模型在水翼空化流数值计算中的可靠性和准确性。
[Abstract]:In order to improve the ability of Schnerr-Sauer model to simulate cavitation flow, a modified Schnerr-Sauer cavitation model is established based on Rayleigh-Plesset equation and homogeneous flow hypothesis. The modified Schnerr-Sauer model takes into account the effect of turbulent kinetic energy on fluctuating pressure and non-condensable gas. The unsteady numerical calculation of cavitation flow around a two-dimensional Clark-Y airfoil with modified SST k- 蠅 turbulence model with simultaneous vortex viscosity coefficient is carried out, and the curve of the time homogenization lift resistance coefficient with cavitation number is obtained. Periodic evolution of cloud cavitation bubble and its horizontal velocity distribution. By comparing and analyzing the experimental results of previous literatures, it is found that the time homogenized rise resistance coefficient calculated by the modified cavitation model is closer to the experimental value, and it can accurately capture the special variation law of the rising resistance coefficient with the cavitation number. The modified Schnerr-Sauer model can accurately simulate the whole process of formation, growth, shedding and collapse of cavitation clouds on the surface of airfoil. The results of this paper verify the reliability and accuracy of the modified Schnerr-Sauer model in the numerical calculation of hydrofoil cavitation flow.
【作者单位】：江苏大学流体机体机械工程技术研究中心;埃因霍分理工大学机械工程系;
【基金】：国家自然科学基金重点项目(51239005) 江苏省普通高校研究生科研创新计划项目(KYLX_1040) 江苏高校优势学科建设工程项目(PAPD)
【分类号】：O35

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