空化射流冲蚀的数值预测
Numerical prediction of erosion due to a cavitating jet
摘要：
本文采用高分辨率有限体积法对空化射流的冲蚀特性进行了数值研究。作为热力学模型，我们采用正压平衡空化的方法，嵌入到一个均匀的混合物模型。为了解决崩溃的蒸汽结构的影响，并估计侵蚀潜力，充分压缩性被认为是。两个不同的工作点，具有不同的空化强度进行了调查，并估计和比较其侵蚀潜力。为此目的使用不同的方法，包括塌陷检测（Mihatsch等人，2015年），最大压力分布的墙壁上，和一种新的方法产生的数值坑当量。详细分析了数值坑当量的数据，并与文献中的实验数据进行了比较。此外，一个全面的网格研究两个工作点。
英文摘要：
We numerically investigate the erosion potential of a cavitating liquid jet by means of high-resolution finite volume simulations. As thermodynamic model, we employ a barotropic equilibrium cavitation approach, embedded into a homogeneous mixture model. To resolve the effects of collapsing vapor structures and to estimate the erosion potential, full compressibility is considered. Two different operating points featuring different cavitation intensities are investigated and their erosion potential is estimated and compared. Different methods are used for this purpose, including collapse detection (Mihatsch et al., 2015), maximum pressure distribution on the wall, and a new method of generating numerical pit equivalents. The data of numerical pit equivalents is analyzed in detail and compared with experimental data from the literature. Furthermore, a comprehensive grid study for both operating points is presented.
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