摘要
以艏侧推桨为研究对象,采用有限体积法,通过求解非定常RANS(Reynolds-Averaged Navier-Stokes)方程对槽道流场进行了数值模拟得到槽道壁的脉动压力,为结构减振优化设计提供初始数据输入.数值模拟得到的脉动压力与试验结果吻合良好,压力脉动集中在桨叶梢附近小块区域.通过对比不同来流方向的脉动压力,发现船舶正前方和正后方来流时,压力脉动值分别出现极小值和极大值,压力脉动情况与流场复杂性相关,水流越顺畅,压力脉动值越小,反之亦然.数值模拟得到的槽道内及螺旋桨叶片上完整的压力云图可为结构优化设计提供重要参考数据,具有工程实用价值.
A bow thruster is the main research object. In order to obtain the initial data for the optimization of structural design, the flow field in the tunnel is numerically simulated through solving the unsteady Reynolds-averaged Navier-Stokes （RANS） equations by the finite volume method and the analysis on the pressure fluctuation is carried out. The numerical results agree very well with the measured data of the model test. The pressure fluctuation is concentrated in small area near the blade tip. By comparing the pressure fluctuation on the tunnel wall under dif{erent flow directions, it is found that the pressure fluctua- tion reaches the minimum and maximum value respectively when the flow is coming from the front and the back of the ship. Furthermore, the study shows that the fluctuating pressure is related to the complexity of the flow field. The smoother the flow is, the smaller the fluctuating pressure becomes, and vice versa. Due to the high precision of the numerical simulation, the results obtained in the paper are of great reference value for optimal design of structures. Therefore, the study is of profound practical significance in engineering.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2017年第3期294-299,共6页
Journal of Shanghai Jiaotong University
关键词
船舶定位
艏侧推器
槽道螺旋桨
数值模拟
脉动压力
ship positioning
bow thruster
tunnel propeller
numerical simulation
pressure fluctuation
