进水流道对水陆两栖车水动力性能的影响研究  

Research on effect of inlet duct on hydrodynamic performance of amphibious vehicle

作　　者：张国卿 冯亿坤 徐小军[1] ZHANG Guoqing;FENG Yikun;XU Xiaojun(College of Intelligence Science and Technology,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]国防科技大学智能科学学院,湖南长沙410073

出　　处：《华中科技大学学报（自然科学版）》2024年第10期47-53,共7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(52201387);湖南省自然科学基金资助项目(2023JJ40669);国防科技大学科研计划资助项目(ZK22-60);湖南省研究生科研创新资助项目(CX20220041)。

摘　　要：为研究进水流道对水陆两栖车水动力性能的影响,基于拖模试验和仿真研究,针对不同航速下加装进水流道前后两栖车水动力性能,以两栖车运动参数、自由液面波形、车身压力分布、纵向速度矢量及流道横截面瞬时轴向速度的变化趋势开展相互作用机理研究.计算结果表明:进水流道对水陆两栖车航行特性影响尤为显著,从运动参数上看,车体阻力明显降低,在弗劳德数Fr=1.220处减阻率达到15.8%;姿态参数和裸车体演变特征基本一致,纵倾角度在Fr=0.683处达到峰值差异8.94%,速度测量范围内升沉幅值最大差异发生在Fr=1.462处,为17.72%;两栖车特殊外形结构影响流道进水均匀性,管内流场的差异随着航速的增加而增大,流动分离区受回流影响发生明显偏移,进而影响出口流场.To study the influence of the inlet duct on the hydrodynamic performance of amphibious vehicles,based on towing tests and simulations,the motion parameters of the amphibious vehicle,the free surface waveform,the body pressure distribution,the longitudinal velocity vector and the instantaneous axial velocity of the cross section at different speeds were investigated to study the interaction mechanism.Calculation results show that inlet duct has a significant impact on the navigation characteristics of amphibious vehicles.The resistance is significantly reduced,and the drag reduction rate is up to 15.8% at Fr=1.220.The attitude parameters are basically consistent with the evolution characteristics of the bare vehicle.The maximum difference of pitch angle is 8.94% at Fr=0.683,and the maximum difference of heave amplitude in the range of velocity measurement is 17.72% at Fr=1.462.The uniformity of the inlet duct is affected by the special structure of the amphibious vehicle.The difference in the flow field in the inlet duct is increased with the speed increases.The flow separation zone is obviously offset by reflux,which affects the outlet flow field.

关 键 词：进水流道 水陆两栖车 相互作用 数值模拟 流动分离 

分 类 号：U661.1[交通运输工程—船舶及航道工程] O352[交通运输工程—船舶与海洋工程]