水力加载器内部汽蚀数值模拟及失效分析

系统仿真学报 ›› 2016, Vol. 28 ›› Issue (6): 1432-1438.

水力加载器内部汽蚀数值模拟及失效分析

莫丽¹, 杨琪¹, 王玉梅²

1.西南石油大学机电工程学院,成都 610500;
2.上海海隆石油钻具有限公司,上海 200949

收稿日期:2015-01-14 修回日期:2015-05-05 出版日期:2016-06-08 发布日期:2020-06-08
作者简介:莫丽(1968-),女,四川,副教授,硕导,研究方向为机械设计;杨琪(1990-),女,四川,硕士生,研究方向为机械设计与仿真;王玉梅(1988-),女,重庆,硕士,研究方向为流场仿真。
基金资助:
国家科技重大专项(2011ZX05037)

Numerical Simulation of Cavitation and Failure Analysis in Hydraulic Loader

Mo Li¹, Yang Qi¹, Wang Yumei²

1. Departmentof Mechatronic Engineering, Southwest Petroleum University, Chengdu 610500, China;
2. Shanghai Hi-long Drill Pipe Co. , Ltd. shanghai 200949, China

Received:2015-01-14 Revised:2015-05-05 Online:2016-06-08 Published:2020-06-08

摘要/Abstract

摘要： 采用CFX软件,选用SST κ-ω模型及Rayleigh-Plesset空化模型对水力加载器进行了全流道三维定常汽液两相流的数值模拟,研究了进口流量、转速、叶片倾角对水力加载器内部汽蚀的影响规律。结果表明：在小流量工况、较大的叶片倾角(≥60°)及低转速(≤3 000 r/min)下汽蚀较轻;不同工况下,汽蚀出现在径向方向上的位置一致,主要分布在r/R=0.4~0.8,在r/R=0.6~0.7出现严重汽蚀。数值模拟的结果与水力加载器实际产生失效的情况相符,说明汽蚀破坏是其工作失效的一个主要原因。

关键词: 水力加载器, 两相流, 汽蚀, 数值模拟, 失效分析

Abstract: Using software CFX with SST κ-ω model and Rayleigh-Plesset cavitation model, the numerical simulation of 3-D steady flow with water liquid and water vapour two phases in whole flow passage of hydraulic loader was conducted. The influences of different parameters (inlet flow rate, rotational speed and blade angle) on cavitation of hydraulic loader were studied. The results show that, under small flow rate, large blade angle (≥60°) and low speed (≤3 000 r/min), cavitation is light. At different working conditions, where cavitation appears in radial direction of position is the same. The cavitation mainly distributes where the r/R is 0.4 to 0.8 and severe cavitation distributes where the r/R is 0.6~0.7. The results of numerical simulation are consistent with the actual failure of hydraulic loader. So the cavitation damage is a main reason for the failure of hydraulic loader.

Key words: hydraulic loader, two-phase flow, cavitation, numerical simulation, failure analysis

中图分类号:

TP391.9

莫丽, 杨琪, 王玉梅. 水力加载器内部汽蚀数值模拟及失效分析[J]. 系统仿真学报, 2016, 28(6): 1432-1438.

Mo Li, Yang Qi, Wang Yumei. Numerical Simulation of Cavitation and Failure Analysis in Hydraulic Loader[J]. Journal of System Simulation, 2016, 28(6): 1432-1438.

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