深水密度层航行潜艇兴波阻力的影响分析

This study employs a multiphase flow Computational Fluid Dynamics (CFD) model for submarine hydrodynamic characteristics analyses in a density-stratified fluid based on the theory of viscous flow and the method of User-Defined Function to investigate a submarine's resistance characteristics in the density-stratified fluid. The resistance characteristics of the SUBOFF submarine model navigating at various speeds and different positions under the internal wave interface were analyzed. The results show that the forward speed and position of a submarine navigating in deepwater significantly impact the resistance characteristics of the submarine. The main contributor to the change in the submarine's total resistance is the wave-making resistance. Compared to a submarine navigating near the surface, the wave-making resistance coefficient curve of the submarine navigating in deepwater layers exhibits a peak that moves toward a high speed. The change in position affects the overall pressure distribution on the submarine's surface, in contrast to the variation in the forward speed, which only affects the pressure at the inflection point on the submarine surface. This study shows the resistance characteristics of a submarine navigating in deepwater under different conditions in a density-stratified fluid, which can be adopted to provide an effective method for analyzing the submarine's resistance considering multiple parameters in the density-stratified fluid.