E779a data set (Banca dati)

  • E779a data set (Banca dati) (literal)
  • 2005-01-01T00:00:00+01:00 (literal)
Alternative label
  • F. Di Felice, M. Felli, F.Pereira, F.Salvatore (2005)
    E779a data set
  • F. Di Felice, M. Felli, F.Pereira, F.Salvatore (literal)
  • Floppy-Disk (literal)
  • INSEAN (literal)
  • E779a data set (literal)
  • In the last few years, remarkable improvements in numerical modeling of viscous flows around marine propellers have been obtained. In particular, Reynolds Averaged Navier-Stokes (RANS) equation solvers start to be widely used to analyze viscosity effects on propulsors at model-scale Reynolds number, in the case of uniform inflow and non-cavitating conditions. The development of such advanced computational tools is required, especially in modern propeller design, where for reducing propeller-induced hull vibrations, efficiency decay and noise generation due to cavitation, there is a continuous trend towards an increased complexity of the blade geometry, primarily due to the low aspect ratio and to the skew of marine propellers, which cause strong three-dimensional effects. This complexity requires a better knowledge of the wake characteristics in terms of the mean field and turbulent quantities. Therefore, there is a rising interest on detailed data of the velocity flow field around the blades and in the wake, supporting the flow modeling and the validation of the computational tools. Starting since 1997 at INSEAN started a project aimed to obtain high quality data for CFD validation. Measurements of velocity fields, radiated pressure fields cavitation patterns were performed. The chosen propeller was the INSEAN E779a, propeller which was already investigated in the 80's by adopting phase sampling LDV techniques [1],[2]. The present Database was obtained by using LDV and 2D-PIV. Both techniques allow a powerful investigation of the flow field. LDV was used to perform the survey of the 3 velocity components in transversal planes, while PIV measurements were performed along longitudinal planes, acquiring the axial and the radial velocity components. All the measurements were performed in phase with propeller angular position. Furthermore recently radiated pressure fluctuation and cavitation pattern has been measured in order to validate Cavitation BEM calculations Propeller geometry, velocity, pressure fluctuations and cavitation pattern data are available for downloading on Internet at http://crm.insean.it/E779A. (literal)
Prodotto di
Autore CNR

Incoming links:

Autore CNR di