Numerical analysis of unsteady hydrodynamic performance of pump-jet propulsor in oblique flow
11th International Workshop on Ship and Marine Hydrodynamics (IWSH2019), Paper 7
Contribution to Conference
In this study, the SST k-omega turbulence model and the sliding mesh technology based on RANS method has been adopted to simulate the exciting force and hydrodynamics of a pump-jet propulsor in different oblique flow angles (0°, 10°, 20°, 30°) and different advance ratio (J=0.95, J=1.18, J=1.58). The full structured grid and full channel model has been adopted to improved computational accuracy. The time-domain data of pump-jet propulsor exciting force including bearing force and fluctuating pressure in different working conditions was monitored, and then converted to frequency domain data by fast Fourier transform (FFT). The various laws of bearing force in different advance ratio and different oblique flow angles has been presented. The results show that the exciting force will decrease with the oblique flow angle increases. And the closer which is to the rotor domain and the closer to the blades tip, the greater the variation of the pulsating pressure. At the same time, the vertical and transverse forces will change more obviously, which is the main cause of the exciting force. In addition, the pressure distribution of the rotor and stator blades in different oblique flow angles has been investigated.
More Funding Information
National Natural Science Foundation of China
National Key Research and Development Project of China
Natural Science Basic Research Plan in Shaanxi Province of China