Numerical Modelling and Prediction of Erosion Induced by Hydrodynamic Cavitation

Numerical Modelling and Prediction of Erosion Induced by Hydrodynamic Cavitation
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水动力空化引起的侵蚀的数值模拟和预测

DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
O. el Moctar
O. el Moctar
中科院分区：
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文献类型：
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作者：
A. Peters;U. Lantermann;O. el Moctar

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本工作旨在利用数值流动解算器和新开发的侵蚀模型来预测空化侵蚀。侵蚀模型基于这样的假设，即单个空化气泡在固体边界附近坍塌时形成高速微喷流，微喷流以高压力幅度引起声速冲击，破坏表面。侵蚀模型使用数值欧拉-欧拉流模拟的信息来预测侵蚀敏感区，并评估水流的侵蚀侵袭性。将数值计算结果与轴对称喷管试验结果进行了比较。
The present work aims to predict cavitation erosion using a numerical flow solver together with a new developed erosion model. The erosion model is based on the hypothesis that collapses of single cavitation bubbles near solid boundaries form high velocity microjets, which cause sonic impacts with high pressure amplitudes damaging the surface. The erosion model uses information from a numerical Euler-Euler flow simulation to predict erosion sensitive areas and assess the erosion aggressiveness of the flow. The obtained numerical results were compared to experimental results from tests of an axisymmetric nozzle.