基于CFD的水下回转体高速运动阻力预报精度影响研究  

Research on resistance forecast accuracy of high-speed underwater revolving object based on CFD

作　　者：邓峰[1] 戴余良[1] 陈志法[2] 蒋竞超[1] 

机构地区：[1]海军工程大学 [2]中国人民解放军61139部队

出　　处：《舰船科学技术》2016年第2期22-26,共5页Ship Science and Technology

基　　金：国家自然科学基金资助项目(51179196)

摘　　要：水下回转体高速运动的阻力精确预报对潜艇性能研究意义重大,其复杂的影响因素对预报精度提出了挑战。本文基于商业CFD软件Fluent,设计了3种不同网格数量与3种不同Y+值,共9套网格,在5种不同的湍流模型下仿真计算水下回转体高速运动的阻力,以考察网格数量、壁面Y+值以及湍流模型对计算精度的影响。并且通过对比试验数据发现:网格数量增大对提高计算精度有积极作用,除k-ε模型在Y+<5时误差较大外,其余模型计算精度均在接受范围内,并且k-ω精度稳定性较好,对通用Y+<120的范围内均可满足工程要求,这对潜艇高速运动阻力预报有一定参考价值。It makes a great significance to predict the resistance of high-speed underwater revolving object accurately,but the complicate influencing factors pose a great challenge. In order to figure out the influence of the gird＇s number,the wall Y ＋ and the turbulence model on the accuracy,this paper designed nine sets of grids which included three different kinds of numbers and Y ＋ values to be simulated with five kinds of turbulence models based on the commercial CFD software Fluent. The experiment dates show that the accuracy improves with the grid＇s number increases. Except for the situation of model k- ε with Y ＋ 5,the calculation accuracy of others are acceptable. Moreover,the model k- ω has high accuracy as well as high stability which meets the engineering accuracy requirements in range of Y ＋ 120. These experiments provide references to forecast the resistance of high-speed submarine.

关 键 词：潜艇阻力 数值计算 湍流模型 网格 壁面Y+ 

分 类 号：U661.3[交通运输工程—船舶及航道工程]