TY - JOUR
T1 - CFD predictions of unsteady cavitation for a marine propeller in oblique inflow
AU - Viitanen, Ville
AU - Sipilä, Tuomas
AU - Sánchez-Caja, Antonio
AU - Siikonen, Timo
N1 - Funding Information:
V. Viitanen would like to express his gratitude for the support granted by the Finnish Funding Agency for Innovation (TEKES), Finland and the German Federal Ministry for Economic Affairs and Energy within the project “PropNoise”. Without the funding the research project could not have been realized.
Publisher Copyright:
© 2022 The Author(s)
PY - 2022/12/15
Y1 - 2022/12/15
N2 - In this paper the Potsdam Propeller Test Case is numerically investigated in oblique inflow conditions. We consider three different topics: open water performance curves, cavitation observations, and pressure pulses induced by the propeller to the ceiling of the cavitation tunnel. In the oblique flow case, the inflow is not uniform from the perspective of the propeller, which results in the dependency of the propeller blade loading and cavitation on the blade rate frequency. The numerical simulations were compared to experimental results for each investigated case. Additionally, we analyzed the unsteady features of the cavitation on the blades as well as the pressure peaks in the propeller wake due to collapsing cavities. We found that the global performance and cavitation patterns close to the blades agree well with the tests in the numerical simulations. The agreement with the tests for the pressure pulses on the tunnel ceiling was better in the non-cavitating case. The unsteady cavitation shed behind the propeller and the subsequent collapse events induced a vast increase in recorded maximum pressure values. Root cavitation collapse produced pressure pulses an order of magnitude greater than the collapse of tip vortex cavitation. Also the collapse of cavities on the blades contributed to a significant increase in the pressure fluctuations on the blades.
AB - In this paper the Potsdam Propeller Test Case is numerically investigated in oblique inflow conditions. We consider three different topics: open water performance curves, cavitation observations, and pressure pulses induced by the propeller to the ceiling of the cavitation tunnel. In the oblique flow case, the inflow is not uniform from the perspective of the propeller, which results in the dependency of the propeller blade loading and cavitation on the blade rate frequency. The numerical simulations were compared to experimental results for each investigated case. Additionally, we analyzed the unsteady features of the cavitation on the blades as well as the pressure peaks in the propeller wake due to collapsing cavities. We found that the global performance and cavitation patterns close to the blades agree well with the tests in the numerical simulations. The agreement with the tests for the pressure pulses on the tunnel ceiling was better in the non-cavitating case. The unsteady cavitation shed behind the propeller and the subsequent collapse events induced a vast increase in recorded maximum pressure values. Root cavitation collapse produced pressure pulses an order of magnitude greater than the collapse of tip vortex cavitation. Also the collapse of cavities on the blades contributed to a significant increase in the pressure fluctuations on the blades.
KW - Compressible two-phase flow
KW - Hydrodynamic cavitation
KW - Marine propeller cavitation
KW - Propeller hydrodynamics
KW - Propeller-induced pressure pulses
UR - http://www.scopus.com/inward/record.url?scp=85141257930&partnerID=8YFLogxK
U2 - 10.1016/j.oceaneng.2022.112596
DO - 10.1016/j.oceaneng.2022.112596
M3 - Article
AN - SCOPUS:85141257930
VL - 266
JO - Ocean Engineering
JF - Ocean Engineering
SN - 0029-8018
M1 - 112596
ER -