文丘里管内空化演变模型研究

doi:10.16182/j.issn1004731x.joss.17-9174

系统仿真学报 ›› 2020, Vol. 32 ›› Issue (2): 164-171.doi: 10.16182/j.issn1004731x.joss.17-9174

文丘里管内空化演变模型研究

韩桂华, 刘亚楠, 邵俊鹏, 张此军

哈尔滨理工大学机械工程动力学院,黑龙江哈尔滨 150080

收稿日期:2017-12-13 修回日期:2018-09-03 出版日期:2020-02-18 发布日期:2020-02-19
作者简介:韩桂华(1972-),女,山东陵县,博士,教授,研究方向为计算流体力学(CFD)、功能流体应用、气液两相流动机理及应用;刘亚楠(1991-),男,河北宣化,硕士生,研究方向为水力空化。
基金资助:
国家自然科学基金(51405113)

Research on Cavitation Evolution Model in Venturi Tube

Han Guihua, Liu Yanan, Shao Junpeng, Zhang Cijun

School of Mechanical Power Engineer, Harbin University of Science and Technology, Harbin 150080, China

Received:2017-12-13 Revised:2018-09-03 Online:2020-02-18 Published:2020-02-19

摘要/Abstract

摘要： 以文丘里管空化发生器为对象,通过考虑水中空气析出与消解过程的时变性,建立了水气两相动态空化模型。运用FLUENT软件对水气两相流流动问题进行三维数值模拟研究,获得了文丘里管喉口直径、进口压力等对汽含率变化的影响规律。数值模拟结果与实验相对比表明,汽含率随进口压力增加而增加;如果喉径增大,可通过增加进口压力作为补偿,以达到同样的空化效果;出口锥角为20°和8°文丘里管的空化效果对比依赖于进口压力、喉径等条件;模拟条件下串联文丘里管不能实现两级空化。

关键词: 文丘里管, 动态空化模型, 数值模拟, 空化效果

Abstract: The dynamic cavitation model of venturi tube air-water two-phase flow was established according to the time variation of air precipitation and digestion process in water. FLUENT three-dimension numerical simulation were studied to simulate the air-water two-phase flow, and the variation law of venturi tube throat diameter and inlet pressure on vapor volume fraction were obtained. The results of numerical simulation and experiments show that the vapor volume fraction increases following the increase of the inlet pressure. If the throat diameter is increased, the inlet pressure can be increased as the compensation to achieve the same cavitation effect. The venturi tube cavitation effect with the outlet 20° and 8° depend on the inlet pressure and the throat diameter. The series venturi tube cannot achieve two-level cavitation under the simulation conditions.

Key words: venturi tube, dynamic cavitation model, numerical simulation, cavitation effect

中图分类号:

TL334

韩桂华, 刘亚楠, 邵俊鹏, 张此军. 文丘里管内空化演变模型研究[J]. 系统仿真学报, 2020, 32(2): 164-171.

Han Guihua, Liu Yanan, Shao Junpeng, Zhang Cijun. Research on Cavitation Evolution Model in Venturi Tube[J]. Journal of System Simulation, 2020, 32(2): 164-171.

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文丘里管内空化演变模型研究

Research on Cavitation Evolution Model in Venturi Tube

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