新型钢板桩液力自旋式喷嘴设计及流场分析  

Design and Flow Field Analysis of a New Type of Hydraulic Spinning Nozzle for Steel Sheet Pile

作　　者：邓智超 赵鲲鹏 王贵和[1] 贾苍琴[1] 冯梓波 DENG Zhi-chao;ZHAO Kun-peng;WANG Gui-he;JIA Cang-qin;FENG Zi-bo(School of Engineering and Technology,China University of Geoscience,Beijing 100083)

机构地区：[1]中国地质大学工程技术学院,北京100083

出　　处：《液压与气动》2022年第9期171-179,共9页Chinese Hydraulics & Pneumatics

摘　　要：针对钢板桩遇密实土层难以沉桩的问题,设计了一种新型液力自旋式喷嘴结构。基于流体力学理论,利用Fluent软件,通过改变斜射流口的偏心距、斜射流口与水平面的夹角等结构参数,得到了该喷嘴内腔的压力、流速及旋转体转矩的变化规律。结果表明:随着偏心距的增大,旋转体转矩增大;斜射流口的出口平均流速在小偏心距变化微小,在大偏心距逐渐减小;随着水平夹角的增大,旋转体转矩减小;斜射流口的出口平均流速随着水平夹角的增大先增大后减小,且随着偏心距的增大其峰值点逐渐后移。In order to solve the problem that steel sheet pile is difficult to sink in dense soil, a new type of hydraulic spin nozzle structure is designed. Based on the fluid mechanics theory, the structural parameters such as the eccentricity of oblique jet port, the angle between oblique jet port and horizontal plane were changed by using Fluent software, the variations of the pressure, velocity and torque of the rotating body in the inner cavity of the nozzle were obtained. The results show that the rotating body torque increases with the increase of eccentric distance, the average flow velocity at the exit of oblique jet port changes little with the small eccentric distance, and decreases gradually with the large eccentric distance, and increases with the increase of horizontal angle, the average velocity at the exit of oblique jet increases first and then decreases with the increase of horizontal angle, and the peak value moves back gradually with the increase of eccentricity.

关 键 词：钢板桩 水射流 自旋 转矩 变化规律 

分 类 号：TH137[机械工程—机械制造及自动化]