Numerical study of the steady- state tip vortex flow over a finite-span hydrofoil

Chao Tsung Hsiao, Laura L. Pauley

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

The flow over a finite-span hydrofoil creating a tip vortex was numerically studied by computing the full Navier-Stokes equations. A good agreement in pressure distribution and oil flow pattern was achieved between the numerical solution and available experimental data. The steady-state roll-up process of the tip vortex was described in detail from the numerical results. The effect of the angle of attack, the Reynolds number, and the hydrofoil planform on the tip vortex was investigated. The axial and tangential velocities within the tip-vortex core in the near-field wake region were greatly influenced by the angle of attack. A jet-like profile in the axial velocity was found within the tip-vortex core at high angle of attack, while a wake-like profile in the axial velocity was found at low angle of attack. Increasing the Reynolds number was found to increase the maximum axial velocity, but only had a slight impact on the tangential velocity. Finally, a swept hydrofoil planform was found to attenuate the strength of the tip vortex due to the low-momentum boundary layer traveling into the tip vortex on the suction side.

Original languageEnglish (US)
Pages (from-to)345-353
Number of pages9
JournalJournal of Fluids Engineering, Transactions of the ASME
Volume120
Issue number2
DOIs
StatePublished - Jun 1998

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

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