Theoretical Analysis And Computation Of Thick Boundary Layer Around A Body Of Revolution

Viscous flow around an object is the main research area of the hydrodynamics. It can predict the total resistance, pressure distribution of flow field, velocity distribution, etc. All these information are related to the hydrodynamic noise, the total resistance of sailing object and the propeller in the ship stern flow field, therefore it is important to the engineering application. The computational model and numerical method of the thick-layer are discussed in this paper, which is a part of the calculation on three-dimensional boundary layer of a sailing body. The thick-layer of a body of revolution is analyzed; therefore the three-dimensional transverse flow can be ignored. The boundary layer equation derived from N.S equation, laminar boundary layer equation of a revolving object, thin turbulent flow boundary layer equation and thick turbulent flow boundary layer equation are discussed in the second part of this paper, while the numerical methods of the thin boundary layer of a revolving object is presented in the third part, which are integral method and differential method; the numerical program is provided and some example case are calculated. The fourth part discussed the deduction of the computation model for thick boundary layer, the computational software and some examples are discussed according to the model. The work of this paper is important to the analysis on the total resistance of a body of revolution, the calculation of the stern flow field and the extension of the calculation of the three-dimensional boundary layer.