Based on the MMG model and the hydrodynamic characteristics of ships with twin propellers and twin rudders,a mathematical model for simulating the ship manoeuvring motion in horizontal plane and in calm water is proposed.
The test results indicated as follows: 1. one of the most important factors to influence the hydrodynamic characteristics of otter board was dihedral angle, followed by aspect ratio and sweepback angle.
A mathematic model was established for the calculation of unsteady hydrodynamic characteristics for the lateral motion of an all-azimuth propeller using the conventional propeller lifting surface theory and the potential flow theory and the Green theorem,and numeric predictions were then made for the hydrodynamic characteristics of lateral movement of the all_azimuth propeller using the finite basic solution method and the unsteady vortex grid method.
Much attention is focus on the comparison and studying of the reliability of the different methods when applied to the two type rotors, which is the important base of the selecting of rotors, the designing of hydrodynamics performance, and the general designing of tidal current power plant.
Much attention is focused on the comparison and studying of the reliability of the different methods when applied to this kind of turbine and focused on the probing into the hydrodynamic mechanism of the new optimized turbine. All of these is the important base of the selecting of turbines, the designing of hydrodynamics performance, and the general designing of marine currents power plant.
The research indicates that the depressurized towing tank,signal transmitting system and the depressurizing facilities are capable of accomplishing open water tests studying hydrodynamics performance of conventional propeller and semi-submerged propeller with or without cavitation.
At the same time, with the powerful function of FLUENT to deal with moving boundaries and grids, the unsteady hydrodynamic characters of an oscillating 3D airfoil was numerically calculated and the influence of different parameters (such as oscillating amplitude, cycle and position of axis) on it was discussed.
To research the hydrodynamic characters of the air-cushion platform, not only can provide a theoretical guide for extensive application in production and living, but also build up a reliable foundation for further research.
Through research, software FLUENT was found to be applicable to numerical calculation on dynamic hydrodynamic characters of air-cushion platform, and it also provides a new way on air-cushion platform research.
Hydrodynamic Characteristics of the Upward Cocurrent Flow in Variable-Diameter Tubes
Dendrimers Based on α-Amino Acids: Synthesis and Hydrodynamic Characteristics
Methods for determining the hydrodynamic characteristics of a moving vessel with partitions
The relationship between the observed dependence of the scattering on the time and strain rate and the aggregation of particles (erythrocytes) and hydrodynamic characteristics is discussed.
Expressions are obtained for the potential of the perturbed velocities of the liquid, the wave damping, and the perturbing forces, and the results are given of a calculation of the hydrodynamic characteristics.