Numerical study of periodic cavitating flow around NACA0012 hydrofoil

Karim, Md. Mashud; Ahmmed, Mohammad Shakil

doi:10.1016/j.oceaneng.2012.06.034

Cited by 19 publications

(2 citation statements)

References 9 publications

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“…13 The structures of cavitation and its shedding characteristics around a hydrofoil has been investigated extensively and thoroughly. 14–17 Saito et al. numerically analyzed the unsteady behavior of cloud cavitation, which sheds from the hydrofoil periodically.…”

Section: Introductionmentioning

confidence: 99%

“…numerically analyzed the unsteady behavior of cloud cavitation, which sheds from the hydrofoil periodically. 14,15 For the interaction between the tip leakage flow and the cloud cavitation, Masahiro et al. 18–20 discovered that TLV plays a pivotal role in the complex end-wall flow region of an oscillating hydrofoil based on large eddy simulation.…”

Section: Introductionmentioning

confidence: 99%

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Experimental and numerical investigation of tip leakage vortex cavitation in an axial flow pump under design and off-design conditions

Shen

Zhang

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part A:

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The interaction of tip leakage flow and main flow in an axial flow pump can induce the tip leakage vortex, which causes the unstable flow and complex cavitation structures. In the present research, the modified shear stress transport k–ω turbulence model was utilized to predict the cavitating flow of the model pump under design and off-design conditions. Validations were carried out using high-speed photography techniques. Results show that the simulation results about cavitation performance based on the modified shear stress transport k–ω turbulence model agree well with the experimental results. Cavitation inception occurs more possible at part-load conditions, and with the increase of the flow rate, the starting point of tip leakage vortex gradually moves to the back edge of the blade chord. Both the sheet cavitation and the triangular cavitation cloud that formed in the blade tip grow in size and intensity gradually with the decrease of cavitation number. Distributions of the cavity area fraction and axial velocity show that the tip leakage vortex cavitation locates at the radial coefficient r* = 0.95–1.0 with peaks at about r* = 0.97, while the sheet cavitation is found at r* = 0.5–0.9 on the suction side (SS). The cavitation structures lead to a significant decrease in the axial velocity, especially in the tip region of the blade.

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