水下航行体流场拓扑分析和流动声源辨识  

Topological analysis of flow-field and identification of hydro-acoustic sources around an underwater vehicle

作　　者：张旭[1] 唐科范[2,1] 

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240 [2]上海交通大学水动力学教育部重点实验室,上海200240

出　　处：《水动力学研究与进展（A辑）》2015年第5期495-505,共11页Chinese Journal of Hydrodynamics

摘　　要：该文对SUBOFF潜艇模型的流场、等效声源场和流体动力声场进行了数值模拟。首先应用CFD软件FLUENT,基于大涡模拟方法计算了高雷诺数下SUBOFF模型绕流场;然后应用自编的流动结构拓扑分析计算程序,基于临界点和特征方程共轭复数解判据,对涡流场拓扑结构做出了显示和分析;最后应用声学软件ACTRAN,基于CFD/CHA多步骤混合方法,模拟了等效声源场和声场。Hydro-acoustic numerical simulations of the flow around the SUBOFF submarine model are carried out in this paper. Firstly the flow-fields around the SUBOFF model are calculated by using the CFD software FLUENT, based on the LES method, in high Reynolds numbers; then the topology structures of the flow-fields are visualized and analyzed by using the self-developed computer code based on the criterions of the critical points and the conjugate complex solution of characteristic equation; lastly the acoustic sources and hydrodynamic sound fields are simulated by the acoustic soil-ware ACTRAN, which is based on the hybrid method of CFD/CHA. The results indicate that the used approaches of hydro-acoustic simulations are good for the identification of flow acoustic sources of the underwater vehicle at the high Reynolds number. It is very effective in the visualization and structure analyses of the unsteady, three dimensional complex flows via topology analyses, as well as identifying the acoustic sources. The quail- and quantitative schemes to control the noise sources can be indicated through the above analyses. The ACTRAN is of great advantage to obtain the reasonable source and hydrodynamic sound fields by solving the Lighthilrs equation via the finite-element method.

关 键 词：水下航行体 流场拓扑分析 声源辨识 大涡模拟 流动噪声计算 

分 类 号：TV131.33[水利工程—水力学及河流动力学]