Author
Zhiying Wang
Bio: Zhiying Wang is an academic researcher from Beijing Institute of Technology. The author has contributed to research in topics: Vortex & Vortex shedding. The author has an hindex of 4, co-authored 5 publications receiving 125 citations.
Papers
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TL;DR: In this article, the authors investigate ventilated cavitating flow structures with special emphasis on vortex shedding dynamics via combining experimental and numerical methods, and the results show that the flow patterns can be classified into two principally different categories: structures mainly with vortex shedding (namely Benard-Karman vortex street; Benard Karman vortex Street with vortex filaments and Aligned vortices) and relatively stable structures (such as Aligned Vortices with Re-entrant jet; Re-enterrant jet and Stable supercavity).
70 citations
TL;DR: In this paper, the authors investigated the ventilated cavitating flow structure by combining experimental and numerical methods, and the results showed that when the gas entrainment coefficient Qv is constant, two typical mechanisms of the gas leakage exist at different Fround numbers Fr, namely toroidal vortices mode and two hollow tube vortice mode.
56 citations
TL;DR: In this article, the authors investigated ventilated cavitating vortex shedding dynamics over a bluff body at Re'='6.7'×'104 with large eddy simulation (LES) model.
15 citations
TL;DR: In this article, the authors investigated the influence of ventilated cavitation on vortex shedding in the wake behind a bluff body at Re'='6.7'×'104 combining high-speed camera and TR-PIV measurement with POD analysis.
15 citations
TL;DR: In this article, a compressible fluid model is proposed to investigate dynamics of the turbulent cavitating flow over a Clark-Y hydrofoil, which is based on the homogeneous mixture approach coupled with filter-based density correction model (FBDCM) turbulence model and Zwart cavitation model.
Abstract: In this paper, a compressible fluid model is proposed to investigate dynamics of the turbulent cavitating flow over a Clark-Y hydrofoil. The numerical simulation is based on the homogeneous mixture approach coupled with filter-based density correction model (FBDCM) turbulence model and Zwart cavitation model. Considering the compressibility effect, the equation of state of each phase is introduced into the numerical model. The results show that the predicted results agree well with experimental data concerning the time-averaged lift/drag coefficient and shedding frequency. The quasi-periodic evolution of sheet/cloud cavitation and the resulting lift and drag are discussed in detail. Especially, the present compressible-mixture numerical model is capable of simulating the shock waves in the final stage of cavity collapse. It is found that the shock waves may cause the transient significant increase and decrease in lift and drag if the cavity collapses near the foil surface.
4 citations
Cited by
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TL;DR: In this paper, the authors have carried out numerical simulations of a tip leakage cavitating flow, generated by a straight NACA0009 hydrofoil, using Lagrangian coherent structures (LCSs) combined with Schnerr-Sauer cavitation model.
205 citations
TL;DR: In this paper, the research status and development of bubble dynamics in terms of theory, numerical simulation and experimental technique are reviewed, which cover the underwater explosion bubble, airgun bubble, spark bubble, laser bubble, rising bubble, propeller cavitation bubble, water entry/exit cavityitation bubble and bubble dynamic in other fields such as shipbuilding engineering, ocean engineering, mechanical engineering, environmental engineering, chemical engineering, medical science and so on.
Abstract: Bubbles have very important applications in many fields such as shipbuilding engineering, ocean engineering, mechanical engineering, environmental engineering, chemical engineering, medical science and so on. In this paper, the research status and the development of the bubble dynamics in terms of theory, numerical simulation and experimental technique are reviewed, which cover the underwater explosion bubble, airgun bubble, spark bubble, laser bubble, rising bubble, propeller cavitation bubble, water entry/exit cavitation bubble and bubble dynamics in other fields. Former researchers have done a lot of researches on bubble dynamics and gained fruitful achievements. However, due to the complexity of the bubble motion, many tough mechanical problems remain to be solved. Based on the research progress of bubble dynamics, this paper gives the future research direction of bubble dynamics, aiming to provide references for researches related to bubble dynamics.
95 citations
78 citations
TL;DR: In this paper, the authors used the k-ω SST turbulence model with the turbulence viscosity correction and the Zwart cavitation model to simulate the cavitating flow around a propeller in a non-uniform wake.
64 citations
TL;DR: In this paper, the authors investigated the unsteady pressure fluctuation characteristics in the process of breakup and shedding of unstrainedy sheet/cloud cavitating flows via combined experimental and computational methods.
64 citations