NDLI: Numerical simulation of the transient cavitating turbulent flows around the Clark-Y hydrofoil using modified partially averaged Navier-Stokes method

Content Provider	Springer Nature Link
Author	Huang, Renfang Luo, Xianwu Ji, Bin
Copyright Year	2017
Abstract	This paper presents the implementation and assessment of a modified Partially averaged Navier-Stokes (PANS) turbulence model which can successfully predict the transient cavitating turbulent flows. The proposed model treats the standard k-ε model as the parent model, and its main distinctive features are to (1) formulate the unresolved-to-total kinetic energy ratio (f $_{ k }$) based on the local grid size as well as turbulence length scale, and (2) vary the f $_{ k }$-field both in space and time. Numerical simulation used the modified PANS model for the sheet/cloud cavitating flows around a three-dimensional Clark-Y hydrofoil. The available experimental data and calculations of the standard k-ε model, the f $_{ k }$ = 0.8 PANS model, the f $_{ k }$ = 0.5 PANS model are also provided for comparisons. The results show that the modified PANS model accurately captures the transient cavitation features as observed in experiments, namely, the attached sheet cavity grows in the flow direction until to a maximum length and then it breaks into a highly turbulent cloud cavity with three-dimensional structures in nature. Time-averaged drag/lift coefficients together with the streamwise velocity profiles predicted by the proposed model are in good agreement with the experimental data, and improvements are shown when compared with results of the standard k-ε model, the f $_{ k }$ = 0.8 PANS model and the f $_{ k }$ = 0.5 PANS model. Overall, the modified PANS model shows its encouraging capability of predicting the transient cavitating turbulent flows.
Starting Page	2849
Ending Page	2859
Page Count	11
File Format	PDF
ISSN	1738494X
Journal	Journal of Mechanical Science and Technology
Volume Number	31
Issue Number	6
e-ISSN	19763824
Language	English
Publisher	Korean Society of Steel Construction
Publisher Date	2017-07-25
Publisher Place	Seoul
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Clark-Y hydrofoil Partially averaged Navier-Stokes (PANS) Cavitation Numerical simulation Mechanical Engineering Vibration, Dynamical Systems, Control Industrial and Production Engineering
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Mechanical Engineering

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