离心泵启动过程中蜗壳的瞬态特性分析
汤雄1，王彦伟*,1，万攀2
（1.武汉工程大学 机电工程学院，湖北 武汉 430073；2.中国船舶集团有限公司 第七二二研究所，湖北 武汉 430205）
摘要：为了分析高速离心泵启动过程中蜗壳的瞬态特性，首先通过Flowmaster软件进行启动过程仿真，得出外特性曲线，然后使用CFX对启动过程中的蜗壳进行全流场分析，得出蜗壳内部瞬态速度场分布规律以及轴向力和径向力瞬态变化曲线，同时布置8个监测点对蜗壳的压力脉动进行分析，再通过单向流固耦合对蜗壳的结构进行瞬态特性分析。分析研究结果表明，在离心泵的启动过程中，蜗壳内速度场呈现先紊乱后稳定均匀分布变化，径向力和压力在0.19 s内表现出快速增加，随后较为快速减小直至0.53 s，0.53 s后出现小幅度增加，并在0.91 s逐渐趋向稳定状态。蜗壳结构的振幅在0.19 s达到最大值16.255 μm，0.91 s后在13 μm上下小幅度波动且趋向稳定状态。
关键词：离心泵；蜗壳；启动过程；瞬态分析
中图分类号：TH311 文献标志码：A doi：10.3969/j.issn.1006-0316.2022.02.001
文章编号：1006-0316 (2022) 02-0001-07
Analysis of Transient Characteristics of Volute in Centrifugal Pump Start-Up Process
TANG Xiong1，WANG Yanwei1，WAN Pan2
( 1.School of Mechanical and Electrical Engineering, Wuhan Institute of Technology, Wuhan 430073, China; 2.No.722 Research Institute, CSSC, Wuhan 430205, China )
Abstract: In order to analyze the transient characteristics of the volute in the start-up process of the high-speed centrifugal pump, the start-up process was simulated by the Flowmaster software to obtain the external characteristic curve. Then, CFX was used to analyze the volute in the start-up process to obtain the distribution law of the transient velocity field inside the volute and the transient change curve of axial and radial force. At the same time, eight monitoring points were arranged to analyze the pressure pulsation of the volute, and then the transient characteristics of the volute structure were analyzed through unidirectional fluid-solid coupling. The results show that during the start-up process of centrifugal pump, the velocity field in the volute changes from a disordered state to a stable uniform distribution. The radial force and pressure increase rapidly in 0.19 s, and decrease at a relatively high speed until 0.53 s, and then increase slightly and gradually trend to a stable state in 0.91 s. The amplitude of the volute reaches a maximum value of 16.255 μm at 0.19 s, and fluctuates slightly around 13 μm after 0.91 s and tends to be stable.
Key words：centrifugal pump；volute；start-up process；transient analysis
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收稿日期：2021-06-17
基金项目：国家自然科学基金（51375186）；湖北省教育厅重点科研项目（D20161507）
作者简介：汤雄（1995－），男，湖北孝感人，硕士研究生，主要研究方向为流体机械及机械工程，E-mail：308178464@qq.com；万攀（1990－），男，湖北孝感人，硕士，工程师，主要研究方向为机械设计与仿真分析。*通讯作者：王彦伟（1975－），男，河南开封人，博士，教授，主要研究方向为CAD/CAE、机械优化设计，E-mail：ywwang.cad@gmail.com。
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