High-speed submerged and surface piercing cavitating hydrofoils, including tandem case

Bal, Şakir

doi:10.1016/j.oceaneng.2007.03.007

Cited by 29 publications

(13 citation statements)

References 10 publications

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“…Other studies focused on the interaction between free surface and cloud cavitating flow; these studies employed simulation methods, such as potential flow theory [11,12], boundary element method (BEM) [13][14][15] and large eddy simulation (LES) [16].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Near-wall effect on cloud cavitating flow that surrounds an axisymmetric projectile using large eddy simulation with Cartesian cut-cell mesh method

Wang

Huang

et al. 2018

European Journal of Mechanics - B/Fluids

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Near-wall effect is important for cavitation of flow and vortex structures. These structures are commonly investigated in cavitation of tip-vortex leakage, but are rarely discussed in cloud cavitating flow. In this study, typical experiments and numerical simulation of cloud cavitating flow were conducted near a wall that surrounds an underwater axisymmetric projectile. The experimental observations of cavity development are consistent with numerical results and validate the method's accuracy. Changes in the cavity of the distal and near wall side differ throughout the entire evolution process. The cavity grows faster on the near wall side than on the distal side, whereas the re-entry jet inside the cavity moves slowly toward the shoulder of the model. The strong vortex around the projectile is non-axisymmetric because of the collapsing cavity, which may also affect the cruising stability.

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Section: Introductionmentioning

confidence: 99%

Analysis of Near-wall effect on cloud cavitating flow that surrounds an axisymmetric projectile using large eddy simulation with Cartesian cut-cell mesh method

Wang

Huang

et al. 2018

European Journal of Mechanics - B/Fluids

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“…Faltingsen proposed a numerical method for calculating free surface and steady super cavity based on the potential flow theory and analyzed the important parameters that influence the cavity shape development [24,25]. Bals and Kinnas used the boundary element method to investigate the cavitation problems of submerged and surface piercing hydrofoils as well as to validate his experimental results [26][27][28]. Wang et al conducted an experiment and simulation to examine the characteristics of unsteady cloud cavitation evolution on the surface of a projectile, and then analyzed the interaction between the free surface and cavitation [29].…”

Section: Introductionmentioning

confidence: 99%

Cloud Cavitating Flow That Surrounds a Vertical Hydrofoil Near the Free Surface

Wang

Huang

et al. 2017

Journal of Fluids Engineering

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Unstable cavitation presents an important speed barrier for underwater vehicles such as hydrofoil craft. In this paper, the authors concern about the physical problem about the cloud cavitating flow that surrounds an underwater-launched hydrofoil near the free surface at relatively high-Froude number, which has not been discussed in the previous research. A water tank experiment and computational fluid dynamics (CFD) simulation are conducted in this paper. The results agree well with each other. The cavity evolution process in the experiment involves three stages, namely, cavity growth, shedding, and collapse. Numerical methods adopt large eddy simulation (LES) with Cartesian cut-cell mesh. Given that the speed of the model changes during the experiment, this paper examines cases with varying constant speeds. The free surface effects on the cavity, re-entry jet location, and vortex structures are analyzed based on the numerical results.

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“…In the analysis of three-dimensional hydrofoil with free surface, the iterative boundary element method was employed to solve the 2-D and 3-D single cavitating hydrofoils and it was also extended to include the surface piercing hydrofoils and the case of tandem hydrofoils (Bal, 2007). This method was also applied to cavitating swept and V-type hydrofoils (Bal, 2005).…”

Section: Introductionmentioning

confidence: 99%

A lifting line theory for a three-dimensional hydrofoil

Liang

Zong

2011

J. Marine. Sci. Appl.

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Prandtl's lifting line theory was generalized to the lifting problem of a three-dimensional hydrofoil in the presence of a free surface. Similar to the classical lifting theory, the singularity distribution method was utilized to solve two-dimensional lifting problems for the hydrofoil beneath the free surface at the air-water interface, and a lifting line theory was developed to correct three-dimensional effects of the hydrofoil with a large aspect ratio. Differing from the classical lifting theory, the main focus was on finding the three-dimensional Green function of the free surface induced by the steady motion of a system of horseshoe vortices under the free surface. Finally, numerical examples were given to show the relationship between the lift coefficient and submergence Froude numbers for 2-D and 3-D hydrofoils. If the submergence Froude number is small free surface effect will be significant registered as the increase of lift coefficient. The validity of these approaches was examined in comparison with the results calculated by other methods.

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High-speed submerged and surface piercing cavitating hydrofoils, including tandem case

Cited by 29 publications

References 10 publications

Analysis of Near-wall effect on cloud cavitating flow that surrounds an axisymmetric projectile using large eddy simulation with Cartesian cut-cell mesh method

Analysis of Near-wall effect on cloud cavitating flow that surrounds an axisymmetric projectile using large eddy simulation with Cartesian cut-cell mesh method

Cloud Cavitating Flow That Surrounds a Vertical Hydrofoil Near the Free Surface

A lifting line theory for a three-dimensional hydrofoil

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