Numerically calculating viscous flow around a full-appendage submarine using multi-block structural grid

Sections 1 and 2 of the full paper explain how we apply CFD (computational fluid dynamics) to calculating the viscous flow around a full-appendage submarine. Their core consists of; (1) we establish the geometric model of the SUBOFF AFF-8 full-appendage submarine and generate the high-quality multi-block structural grid of its flow field; (2) we use the Reynolds time-averaged method, the SST k-ω turbulence model and the finite volume method to numerically calculate the steady viscous flow around the submarine; (3) we give the longitudinal distributions of the pressure coefficient and wall shear stress coefficient along the upper meridian line and also the pressure coefficients at the three heights of the fairwater and the stern respectively; we also give the calculation results of the total resistance of the submarine and compare them with the experimental results obtained from the DTMB tow tank in the U. S. The simulation results, given in Figs. 4 through 9 and Table 1, and their analysis show preliminarily that the calculation results obtained with our method agree well with the experimental results obtained from the DTMB tow tank; this indicates that our numerical calculation method has high precision and is valid and effective, thus laying a solid foundation for the further study of the viscous flow around a submarine.