Application And Simulation Research Of Bionic Fins In The Ship Rolling

The fin stabilizer is one of the most popular used stabilizing devices. For a long time have been many scientific research workers on the fin stabilizer done a lot of research and improvement, and improvement of these studies focused on two aspects: Firstly, the improvement of the fin stabilizer controlling system. the major control object on the model parameters to changeable circumstances, with the aspect of the research and application on self-adaptive neural networks. Secondly, how to improve the anti-roll torque mainly focus on anti-rolling moment to carry out. Improving the type of fin is able to enhance anti-rolling torque. The imitating humpback whale fin stabilizer is a kind of special front edge deformation fin stabilizer and has front prominent nodules structure.In this paper, the research is that by hydrodynamics the thoughts, to optimize or increase lift coefficient, Under the control of the object itself from the anti-rolling fin was extended to the work of the anti-rolling fin flow field. These special front edge prominent tubercles of the imitating humpback whale fin stabilizer can effectively delay stall and postpone boundary layer separation, thus improve capacity of the fin stabilizer to increasing lift or reducing resistance. Fin stabilizer in the same angle of attack can have more lift and increase angle of stall, enhancing anti-rolling capacity.Facing the same situation, aquatic marine animals are doing very well. They have a few millions of years of nature and even billions of years of evolution, they are used by the body and the way the campaign has been very good shape to the surrounding environment, they evolved a highly efficient institutions and the surface of the swimming micro-structure , Its surface friction and pressure resistance are also very low. The thesis is mainly based on the bionics research and exploration of relevant knowledge of fluid dynamics, and is carried out further studies on imitating the humpback whale fin-type. Established the analytical solution of the lift model and using computational fluid dynamics software FLUENT, carrying out the lift numerical calculation based on the special front edge prominent tubercle fin-type, by comparing the accuracy of the model is verified. And comparing with standard fin-type pool experimental data under the same condition, we find that the imitating humpback whale fin stabilizer fin-type can provide more lift in the same angle of attack. Utimately, we simulate the effects of the imitating humpback whale fin stabilizer's anti-rolling by MATLAB software and can attain the desired results.Using the imitating humpback whale fin stabilizer fin-type, will bring additional equipments, energy consumption and space occupied, the fluid will not cause pollution, and rely solely on the wall directly change the shape can play a very good performance by up. Therefore, going through further research, the application prospect of the deformation of the fin is very spacious.