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Verification and validation of Urans simulations of the turbulent cavitating flow around the hydrofoil

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Abstract

In this paper, we investigate the verification and validation (V&V) procedures for the Urans simulations of the turbulent cavitating flow around a Clark-Y hydrofoil. The main focus is on the feasibility of various Richardson extrapolation-based uncertainty estimators in the cavitating flow simulation. The unsteady cavitating flow is simulated by a density corrected model (DCM) coupled with the Zwart cavitation model. The estimated uncertainty is used to evaluate the applicability of various uncertainty estimation methods for the cavitating flow simulation. It is shown that the preferred uncertainty estimators include the modified Factor of Safety (FS1), the Factor of Safety (FS) and the Grid Convergence Index (GCI). The distribution of the area without achieving the validation at the U v level shows a strong relationship with the cavitation. Further analysis indicates that the predicted velocity distributions, the transient cavitation patterns and the effects of the vortex stretching are highly influenced by the mesh resolution.

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Authors and Affiliations

  1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, 430072, China

    Yun Long  (龙云), Xin-ping Long  (龙新平), Bin Ji  (季斌), Wen-xin Huai & Zhong-dong Qian

  2. Hubei Key Laboratory of Waterjet Theory and New Technology, School of Power and Mechanical Engineering, Wuhan University, Wuhan, 430072, China

    Yun Long  (龙云), Xin-ping Long  (龙新平) & Bin Ji  (季斌)

  3. Science and Technology on Water Jet Propulsion Laboratory, Shanghai, 200011, China

    Yun Long  (龙云) & Bin Ji  (季斌)

Authors
  1. Yun Long  (龙云)
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  2. Xin-ping Long  (龙新平)
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  3. Bin Ji  (季斌)
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  4. Wen-xin Huai
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  5. Zhong-dong Qian
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Corresponding author

Correspondence to Bin Ji  (季斌).

Additional information

Project supported by the National Natural Science Foundation of China (Project Nos. 51576143, 11472197).

Biography: Yun Long (1993-), Male, Ph. D. Candidate

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Long, Y., Long, Xp., Ji, B. et al. Verification and validation of Urans simulations of the turbulent cavitating flow around the hydrofoil. J Hydrodyn 29, 610–620 (2017). https://doi.org/10.1016/S1001-6058(16)60774-6

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  • DOI: https://doi.org/10.1016/S1001-6058(16)60774-6

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