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Direct numerical simulation of the centrifugal instability-induced transition around a marine propeller blade
Citation Link: https://doi.org/10.15480/882.9312
Publikationstyp
Conference Paper
Date Issued
2024-04-04
Sprache
English
Author(s)
Nantes Université, Ecole Centrale Nantes, CNRS, Nantes, France
Nantes Université, Ecole Centrale Nantes, CNRS, Nantes, France
TORE-DOI
Start Page
547
End Page
555
Citation
8th International Symposium on Marine Propulsors (smp 2024)
Contribution to Conference
Publisher
Norwegian University of Science and Technology, Department of Marine Technology
ISBN
978-82-691120-5-4
Peer Reviewed
true
The boundary layer regime knowledge is a key factor in predicting the performance of lab-scale marine propellers. Even if the distribution of the boundary layer flow regime around the propeller blade is well-known by the marine propeller community, no dynamic of the turbulent process has already been reported in the literature. An Underresolved Direct Numerical Simulation (U-DNS) of a Cseries marine propeller blade at a Reynolds number of 600, 000 and an advance coefficient of 0.73 is performed to gain insights into the turbulent transition mechanisms of the boundary layer. An overset approach is used with the open-source spectral element code Nek5000 to optimize the computational cost of the simulation. After performing a mesh-sensitivity analysis, results are validated using experimental data. The detailed investigation of the boundary layer shows good agreement with the experimental and numerical data. New insights into the turbulent transition dynamics suggest that centrifugal instability plays a major role in the transition process. A map of the boundary layer flow regimes is then discussed. The laminar cross-flow vortices’ inception and breakdown are studied in detail to characterize the onset of longitudinal streaks.
Subjects
Turbulent Transition
Marine Propeller
DNS
CFD
DDC Class
620: Engineering
Publication version
publishedVersion
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Name
Boudenne-DirectNumericalSimulationOfTheCentrifugalInstabilityinducedTrans-1123-1-final.pdf
Type
Main Article
Size
93.26 MB
Format
Adobe PDF