An investigation of scale effects on marine propeller under cavitating and non-cavitating conditions


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Soydan A., Bal Ş.

SHIP TECHNOLOGY RESEARCH, 2021 (Journal Indexed in ESCI) identifier identifier

  • Publication Type: Article / Article
  • Volume:
  • Publication Date: 2021
  • Doi Number: 10.1080/09377255.2021.1883800
  • Title of Journal : SHIP TECHNOLOGY RESEARCH
  • Keywords: Computational fluid dynamics (CFD), RANSE, scale effect, Reynolds number, OpenFOAM, marine propeller, cavitation

Abstract

In this study, scale effects on the hydrodynamic performance of DTMB 4119 propeller have been investigated in uniform flow under non-cavitating and cavitating conditions by a simple practical method based on OpenFOAM. A potential based Lifting Surface Method has also been applied. A verification study of non-cavitating simulations has been carried out by Grid Convergence Index method at one scale ratio. Then the results have been validated with experiments. Schnerr-Sauer cavitation model of OpenFOAM has been used for the phase change between vapor and liquid. Cavitation simulations have been performed as a time-dependent with dynamic mesh while non-cavitating simulations have been carried out as a steady-state with static mesh. Effects of the scale ratio and cavitation simulations have been investigated and a simple fitting procedure on the thrust and torque values based on logarithm of Reynolds number have been applied. Results have also been compared with ITTC corrections.