温度分层环境中水下航行器机动下潜热尾流特征OA北大核心CSTPCD

To study the surface temperature anomalies caused by an underwater vehicle wake,a three-dimensional SUBOFF mathematical model was established using the finite volume method.Fluent UDF and Patch were used to control the maneuvering diving mode and water temperature stratification,respectively.The numerical simulation results show that the wake forms an oval temperature anomaly region comprising two discontinuous high-temperature hot spots on the surface of the underwater vehicle maneuvering down,and a stratified water area with a positive temperature gradient enhances the surface temperature anomaly caused by thermal wake.Under the no heat dis-charge condition,the temperature stratification of the water area is greatly disturbed by a diving maneuvering under-water vehicle,and a cold wake appears.In contrast,due to the influence of heat emission,the thermal wake floats upward as a kidney vortex,the vortex structure scale increases with the sailing distance,and the core temperature decreases with increasing sailing distance.Stratified seawater with a positive temperature gradient enhances the ab-normal sea surface temperature characteristics caused by cooling water;the larger the temperature gradient,the more continuous the hot spots.The hot spot has a maximum core temperature of 292.24 K and differs in tempera-ture from the surrounding seawater by 0.12 K.