流体压力波动是管道系统产生异常振动与噪声的主要根源之一。为了研究输液管道不同工况下的压力波动特性，利用计算流体动力学软件Fluent，对其内部流场进行三维非定常数值模拟，并分析在不同转速和背压工况下管路不同位置的压力波动特性。通过数值分析发现：管内流体的压力波动主要是由泵的周期性吸排作用引起，而且随着输液泵转速的增加而增加；管道不同位置的压力波动大小不同，在弯管密集处压力波动相对较大。最后利用实验验证了仿真模型的有效性。本文对于管路设计和振动治理有一定指导作用。
The main sources of abnormal vibration and noise is fluid pressure fluctuations in piping systems. In order to study the pressure fluctuation characteristics of the fluid conveying pipes under different operating conditions, the three-dimensional unsteady numerical simulation of the internal flow field is carried out by using the computational fluid dynamics software Fluent. Pressure fluctuation characteristics of different position of pipeline under different speed and back pressure condition are analyzed. Numerical analysis found: the pressure fluctuation of the fluid in the pipe is mainly caused by the periodic suction of the pump, And as the pump speed increases, it increases.The pressure fluctuation in different positions of the pipe is different, which is relatively large in the dense bend of the pipe. Finally, the validity of the simulation model is verified by experiments. It has a guiding role for pipeline design and vibration control.
2019,41(9): 110-114,120 收稿日期：2018-02-05
DOI：10.3404/j.issn.1672-7649.2019.09.021
分类号：U664.84
基金项目：湖北省自然科学基金资助项目（2017CFB672）；海军工程大学基金资助项目（425517K143）
作者简介：朱群伟(1993-),男,硕士研究生,研究方向为舰船动力装置状态监测、故障诊断及维修技术
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