Abstract
In the present paper, the Vortex Identified Zwart-Gerber-Belamri (VIZGB) cavitation model coupled with the SST-CC turbulence model is used to investigate the unsteady tip-leakage cavitating flow induced by a NACA0009 hydrofoil. A qualitative comparison between the numerical and experimental results is made. In order to quantitatively evaluate the reliability of the numerical data, the verification and validation (V&V) procedures are used in the present paper. Errors of numerical results are estimated with seven error estimators based on the Richardson extrapolation method. It is shown that though a strict validation cannot be achieved, a reasonable prediction of the gross characteristics of the tip-leakage cavitating flow can be obtained. Based on the numerical results, the influence of the cavitation on the tip-leakage vortex (TLV) is discussed, which indicates that the cavitation accelerates the fusion of the TLV and the tip-separation vortex (TSV). Moreover, the trajectory of the TLV, when the cavitation occurs, is close to the side wall.
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Project supported by the National Natural Science Foundation of China (Grant Nos. 51576143, 11772239 and 91752105), the Science and Technology on Water Jet Propulsion Laboratory (Grant No. 61422230101162223002).
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Cheng, Hy., Long, Xp., Liang, Yz. et al. URANS simulations of the tip-leakage cavitating flow with verification and validation procedures. J Hydrodyn 30, 531–534 (2018). https://doi.org/10.1007/s42241-018-0038-1
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DOI: https://doi.org/10.1007/s42241-018-0038-1