Development of a Numerical Method to Predict Hydrodynamic Cavitation Induced Erosion

该项目的目的是开发一种可靠的数值方法，用于评估水力空化引起的侵蚀。一个欧拉-欧拉方法，以及欧拉-拉格朗日方法将扩展额外的条款和方程的气泡动力学。这些方法将是强耦合的。为了减少计算量，耦合算法将应用于计算域的有限部分，该计算域被认为与空蚀引起的侵蚀相关。提出了一种定性预测空蚀的方法。扩展的侵蚀模型将根据额外的流动细节、气泡动力学和气泡传输进行改进，以更好地预测侵蚀敏感区域并估计不同材料的侵蚀速率。所开发的数值计算方法将根据以前的研究项目和文献中的实验数据进行验证。该耦合方法将应用于船舶空蚀的预测。

The aim of this project is the development of a reliable numerical method for the assessment of hydrodynamic cavitation induced erosion. An Euler-Euler method, as well as an Euler-Lagrange method will be extended by additional terms and equations for bubble dynamics. These methods will be strongly coupled. To reduce the computational effort the coupling algorithm will be applied to a limited part of the computational domain considered as relevant for cavitation induced erosion. An approach to qualitatively predict cavitation erosion has been developed by the authors. The extended erosion model will be improved based on additional flow details, bubble dynamics and bubble transport to better predict the erosion sensitive areas and to estimate erosion rates of different materials. The developed numerical method will be validated based on experimental data from former research projects and from literature. The coupled method will be applied to predict cavitation induced erosion in the maritime field.