[1]刘雪东,刘佳阳,朱小林,等.结构参数对拉伐尔喷管空化特性影响的数值模拟[J].常州大学学报(自然科学版),2014,(02):43-47.[doi:10.3969/j.issn.2095-0411.2014.02.011]
　LIU Xue-dong,LIU Jia-yang,ZHU Xiao-lin,et al.Numerical Simulation on Effect of Cavitation Characteristics with Different Structural Sizes in Laval Nozzle[J].Journal of Changzhou University(Natural Science Edition),2014,(02):43-47.[doi:10.3969/j.issn.2095-0411.2014.02.011]
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结构参数对拉伐尔喷管空化特性影响的数值模拟()
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常州大学学报(自然科学版)[ISSN:2095-0411/CN:32-1822/N]

卷:
期数:
2014年02期
页码:
43-47
栏目:
出版日期:
2014-04-30

文章信息/Info

Title:
Numerical Simulation on Effect of Cavitation Characteristics with Different Structural Sizes in Laval Nozzle
作者:
刘雪东; 刘佳阳; 朱小林; 刘文明
常州大学 机械工程学院,江苏 常州 213016
Author(s):
LIU Xue-dong; LIU Jia-yang; ZHU Xiao-lin; LIU Wen-ming
School of Mechanical Engineering,Changzhou University,Changzhou 213016,China
关键词:
拉伐尔喷管; 空化效应; 数值模拟; 汽含率
Keywords:
Laval nozzle;  cavitation effect;  numerical simulation;  vaporvolume fraction
分类号:
O351.2
DOI:
10.3969/j.issn.2095-0411.2014.02.011
文献标志码:
A
摘要:
采用CFD方法模拟水在不同结构参数拉伐尔喷管中的空化流动情况。在一定的操作参数下,采用空化泡动力学模型模拟分析拉伐尔喷管不同入口直径、喉部直径、收缩段长度、扩张段长度、扩张段锥角等结构参数对空化效果的影响,并参照正交试验的方法研究各影响因素与水平之间的关系。结果表明:随着喷管喉部直径的减小,空化区域内的汽含率升高,空化数减小,空化效应增强;入口直径与收缩段长度的改变对喷管空化特性的影响不明显;在一定范围内增大扩张段锥角有利于空化强度的增加,但锥角过大反而抑制空化的进行;扩张段长度的增加可以影响空化产生的区域,但对空化强度影响较小;正交试验结果表明在几个结构参数之中,喉部直径的改变对喷管空化特性的影响最大。
Abstract:
CFD method was used to simulate the cavitation of water inLaval nozzle with different structural sizes.In certain operating parameters,theresearch used Cavitation Bubble Dynamics Model to simulate the cavitation flowwith different inlet diameter,throat diameter,contraction length, expansion length and expansion cone angle of Laval nozzle.In order to determine the optimal structure of the nozzle,orthogonal test was made to find out the relationship between factors and levels.The results show that:with throat diameter decrease,the intensity of cavitation is greater in cavitation area.The change of inlet diameter and contraction length has little effect on cavitation.Expansion cone angle has an impact on the cavitation intensity within a certain range.Increase in length of the expansion can affect cavitation area,but has little effect on the cavitation intensity.Orthogonal test shows that the throat diameter has greatest impact on cavitation among several structural sizes.

参考文献/References:

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备注/Memo

备注/Memo:
基金项目:江苏省2013年度高校研究生科研创新计划资助项目(CXZZ13_0733)。 作者简介:刘雪东(1965-),男,江苏滨海人,教授,主要从事化工过程机械及粉体工程技术的教学与研究。
更新日期/Last Update: 2014-04-20