摘要
为研究潜艇附体流场精细流动特性,基于RANS(雷诺平均法)和IDDES(改进的延迟分离涡模拟),求解了某潜艇模型在不同附体影响下的流场,并对潜艇阻力特性、流场特征、围壳尾流涡结构演化规律和桨盘面流场特性开展研究.结果表明:本文数值方法在围壳尾流能捕捉到精细涡结构,其中马蹄涡强度最高,梢涡次之,发卡涡由于持续扭曲变形,耗散较快,因此涡强度最低;在围壳尾流涡结构形成时间上,围壳梢涡形成最早,马蹄涡次之,发卡涡最晚;尾舵相比围壳引起艇体附近流场和压力场变化的区域小,但其引起的桨盘面处速度空间不均匀性和时间不均匀性比围壳大,且尾舵在与围壳共同影响桨盘面速度过程中,起主导作用.
To study the fine-scale flow characteristics of submarine appendage flow field,RANS(Reynolds-averaged Navier-Stokes method)and IDDES(improved delayed detached eddy simulation)were used to solve the fine-scale flow field of submarine under the influence of different appendages.Effects of different appendages on submarine resistance characteristics,flow field characteristics,sail wake vortex structure evolution and flow field at propeller disk were investigated.Results show that the proposed numerical method can capture fine vortex structure in wake region of sail,in which the intensity of horseshoe vortex is the highest,followed by tip vortex,and the hairpin vortex is the lowest due to its constant distortion and dissipation.In terms of formation time of the sail wake vortex structure,tip vortex forms first,followed by horseshoe vortex,and finally,hairpin vortex is the latest.The variation area of the flow field and pressure field near the hull caused by stern rudder is smaller compared to the sail,however,the velocity spatial and temporal non-uniformity at propeller disk caused by it are greater than that of the sail.Moreover,stern rudder plays a leading role in influencing the velocity of propeller disk together with sail.
作者
卢博
黄桥高
何幸
李晗
LU Bo;HUANG Qiaogao;HE Xing;LI Han(School of Marine Science and Technology,Northwestern Polytechnical University,Xi’an 710072,China;Key Laboratory of Unmanned Underwater Vehicle,Northwestern Polytechnical University,Xi’an 710129,China)
出处
《华中科技大学学报(自然科学版)》
北大核心
2025年第4期119-124,共6页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(U2341285,51979226)
中央高校基本科研业务费专项资金资助项目(D5000240318,HYGJXM202319).
关键词
潜艇
附体
涡结构
阻力特性
桨盘面
submarine
appendages
vortex structure
resistance characteristics
propeller disk
