Study on Side Flow and Excitation Force Characteristics of Podded Propulsor Under Uniform Inflow
In order to explore the wake field distribution of the podded propulsor and the excita-tion force characteristics of the podded propulsor under uniform inflow,the unsteady open water numerical simulation of the podded propulsor under uniform flow with different advance coefficients is carried out based on the delayed separation vortex model(DDES).The distribution of the wake field and the characteristics of propeller thrust,torque and pressure fluctuation on the surface of the pod under different working conditions are obtained.The results show that there is inhomogene-ity in the wake field induced by the pod on the propeller disk surface.Comparing the harmonic components of the wake fraction at different radii,it is found that the amplitude of the first-order harmonic component is the highest.There is a correlation between the distribution of the excitation force on the propeller and the distribution of the wake field.The single blade on the propeller is greatly affected by the excitation force,and the characteristic frequency of the surface force is mainly the blade frequency.The pressure pulsation on the left and right sides of the sling surface is asym-metric,and the influence of the propeller induced vortex on the surface pressure pulsation cannot be ignored.
podded propulsoruniform inflowstern flow fieldexcitation force
NETL
NSTL
万方数据
维普
