Pulsation characteristics of ventilated supercavitation on a 2D hydrofoil |
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| Authors: | Jian-hong Guo Chuan-jing Lu |
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| Institution: | (1) Saint Anthony Falls Laboratory, University of Minnesota, 2 Third Ave. SE,, 55414 Minneapolis, MN, USA;(2) Mechanical Engineering, University of Minnesota, 10550 Nicollet Ave S., 55420 Bloomington, MN, USA;(3) Alden Research Laboratory, 30 Shrewsbury St., 01520 Holden, MA, USA;(4) Naval Architecture and Marine Engineering, University of Michigan, 2600 Draper Rd., 48109-2145 Ann Arbor, MI, USA;(5) Department of Civil Engineering, University of Nebraska-Lincoln, Nebraska Hall W348, 68588-0531 Lincoln, NE, USA;(6) Ven Te Chow Hydrosystems Laboratory, Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, 205 North Mathews Avenue, 61801-2352 Urbana, IL, USA |
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| Abstract: | Based on a suite of computational fluid dynamics code, the pulsation characteristics are studied for turbulent supercavitating
flows over a 2D base-vented symmetric hydrofoil using a pressure-based Navier-Stokes solver coupled with a phase mass fraction
transport cavitation model and local linear low-Reynolds-number κ-ɛ turbulence model. It is found that there exists a critical air supply flow under certain inflow condition. When the gas supply
flow exceeds the critical value, the cavity begins to pulsate. Pulsating cavity has a visually wavy surface, and air leakage
shows as a mass of air-water mixture detaching from the rear part of the cavity periodically. |
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