| 改进的特征线方法及过载对水锤效应影响分析 |
| |
| 引用本文： | 马康,顾振杰,白长青.改进的特征线方法及过载对水锤效应影响分析[J].计算力学学报,2020,37(5):623-628. |
| |
| 作者姓名： | 马康 顾振杰 白长青 |
| |
| 作者单位： | 西安交通大学航天航空学院机械结构强度与振动国家重点实验室,西安710049;西安交通大学航天航空学院机械结构强度与振动国家重点实验室,西安710049;陕西省先进飞行器服役环境与控制重点实验室,西安710049 |
| |
| 基金项目： | 西安交通大学高校基本科研业务费（XJJ2015）；教育部留学回国人员科研启动基金资助项目. |
| |
| 摘 要： | 传统特征线方法对过载作用下的水锤计算具有局限性，无法为水锤防护提供可靠性指导。本文在考虑过载效应和动态摩阻的基础上，提出了改进的特征线方法，该方法能准确模拟过载作用下水锤最大压力峰值及水锤波的衰减特性。基于该方法，建立了过载作用下水锤效应数学模型，通过分析结果与CFD数值仿真及实验数据对比，验证了改进特征线方法的正确性。分析结果表明，在恒定过载作用时，阀门位置的流体压力随过载量的增加而增大，且管轴向过载的影响大于横向过载；关阀过程受到瞬时过载作用时，过载效应对水锤最大压力峰值影响显著，而对关阀后水锤波的传播和衰减影响较小；同时，分析了过载效应下关阀特性和流体密度等参数对水锤效应的影响规律。
|
| 关 键 词： | 输流管路 改进的特征线方法 过载作用 水锤效应 |
| 收稿时间： | 2019/9/27 0:00:00 |
| 修稿时间： | 2020/1/14 0:00:00 |
An improved MOC and impact analysis of overload on water hammer |
| |
| MA Kang,GU Zhen-jie,BAI Chang-qing.An improved MOC and impact analysis of overload on water hammer[J].Chinese Journal of Computational Mechanics,2020,37(5):623-628. |
| |
| Authors: | MA Kang GU Zhen-jie BAI Chang-qing |
| |
| Institution: | State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace, Xi''an Jiaotong University, Xi''an 710049, China,State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace, Xi''an Jiaotong University, Xi''an 710049, China and State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace, Xi''an Jiaotong University, Xi''an 710049, China;Shanxi Provincial Key Laboratory of Advanced Aircraft Service Environment and Control, Xi''an 710049, China |
| |
| Abstract: | The traditional MOC is limited in the analysis of water hammer under overload, which cannot provide the reliable guidance for water hammer protection.Considering the overload effect and dynamic friction, an improved MOC that can accurately simulate the maximum pressure and wave attenuation of water hammer is proposed in this paper.The water hammer under overload is investigated, and the method was also verified by comparing the analysis data with CFD and experimental results.It is found that the pressure at the valve position rises with the increase of overload, and the influence of axial overload on water hammer is greater than that of lateral overload.The effect of instantaneous overload is significant on maximum pressure, but little on wave propagation and attenuation as valve closing.Moreover, the influence of parameters such as valve closing characteristics and fluid density on water hammer under overload was analyzed. |
| |
| Keywords: | pipeline an improved MOC overload water hammer |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《计算力学学报》浏览原始摘要信息 |
| 点击此处可从《计算力学学报》下载免费的PDF全文 |
|
