摘要
喷水推进舰艇因具备快速性和高机动性等特点而备受国内外研究人员的关注,本文以T-CRAFT登陆模型艇为研究对象,在RANS计算框架下采用VOF方法和SST k-ω湍流模型对喷水推进舰艇的自航运动进行了数值计算研究,通过与静水阻力及单独喷泵试验结果进行对比,验证了该数值计算方法具有较高的计算精度。同时,开展了设计航速下“艇泵一体”的数值模拟,分析了喷水推进舰艇在设计航速下不同时刻波形云图及流场演化过程,对比分析了艇拖曳和自航下的阻力与姿态变化。研究结果表明:艇尾兴波左右两侧对称均匀,相比拖曳艇体自航阻力增加,纵倾角增加,吃水增加,艇体流线和喷口处流线整体均匀,在转子处存在微小漩涡;水流从转子入口流至喷口速度不均匀系数降低86%,在喷口处呈现较均匀状态,从叶片进口边到叶片出口边,叶片载荷先增大后减小。进一步分析表明,中间流线相对位置0.6~0.8处载荷较大,说明相比前半段叶片,后半段做功能力更强。
Water-jet propulsion ship has been the focus of researchers both at home and abroad because of its rapidity and high maneuverability.The T-craft landing model ship was taken as the research object,and the VOF method and SST k-ωturbulence model were adopted in the Reynolds-Averaged Navier-Stokes cal⁃culation framework to calculate the self-propelled motion of waterjet propulsion ship.The comparison with the calm water resistance and the experimental results of a single jet pump verifies that the numerical calcula⁃tion method has a high calculation accuracy.Meanwhile the numerical simulation of‘boat pump integration’under designed speed was carried out,the wave pattern and the flow field evolution process of the water-jet propulsion ship at different times under designed speed were analyzed,and the resistance and the attitude changes of the model ship under towing and self-propelled were compared and analyzed.The results show that the wave height of the hull is symmetrical and even on both sides.Compared with the towed hull,the self-propelled resistance,trim and draft increase.The streamline of the hull and the nozzle are uniform and there are tiny whirlpools at the rotor.The velocity nonuniformity coefficient of the flow from the rotor inlet to the nozzle is reduced by 86%,showing a more uniform state at the nozzle.From the inlet to the outlet of the blade,the blade load first increases and then decreases.Further analysis shows that the load at the relative position of the middle streamline at 0.6-0.8 is larger,indicating that the function of the latter half of the blade is stronger than that of the former.
作者
鲁航
张富毅
陈泰然
黄彪
王国玉
LU Hang;ZHANG Fu-yi;CHEN Tai-ran;HUANG Biao;WANG Guo-yu(School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China)
出处
《船舶力学》
EI
CSCD
北大核心
2022年第8期1140-1149,共10页
Journal of Ship Mechanics
基金
国家自然科学基金项目(52009001)
装备预研重点实验室基金项目(6142203190202)
北京理工大学青年教师学术启动计划项目
中国博士后科学基金资助项目(2020M680380)。
关键词
喷水推进
登陆艇
静水阻力
自航
数值模拟
叶片载荷
waterjet propulsion
landing craft
calm water resistance
self-propulsion
numerical simulation
blade load
作者简介
鲁航(1997-),男,硕士;通讯作者:陈泰然(1990-),男,博士,助理教授,E-mail:chentairan@bit.edu.cn。
