船舶风筝助航性能CFD模拟研究

he towing kite assisted navigation is different from ordinary sails assisted navigation. Utilized wind energy by a giant kite flying at an altitude of 100-500 m is more stable and strong, so towing kite is more efficient. Mechanical properties of the towing kite were studied using the open source CFD package OpenFOAM and Spalart-Allmaras turbulence model, presented lift and drag coefficients of towing kites of different shapes, different ratio of width to length and different camber under different angles of attack. In order to improve the computational efficiency of numerical simulation, adopted a domain decomposition parallel computing method and a computing strategy combined calculation of potential flow and viscous flow. These calculation methods were also validated. Then, calculated the assisted navigation power of the towing kite, an estimation formula of energy-saving rate to the whole ship of towing kite under different Beaufort scales at different altitudes based on ship resistance and propulsion efficiency point of view was presented.