|本期目录/Table of Contents|

[1]刘勇,张慧栋,魏建平,等.基于拉法尔喷嘴的磨料气体射流加速规律研究[J].中国安全生产科学技术,2018,14(11):26-32.[doi:10.11731/j.issn.1673-193x.2018.11.004]
 LIU Yong,ZHANG Huidong,WEI Jianping,et al.Study on acceleration laws of abrasive gas jet based on Laval nozzle[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2018,14(11):26-32.[doi:10.11731/j.issn.1673-193x.2018.11.004]
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基于拉法尔喷嘴的磨料气体射流加速规律研究
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
14
期数:
2018年11期
页码:
26-32
栏目:
学术论著
出版日期:
2018-11-30

文章信息/Info

Title:
Study on acceleration laws of abrasive gas jet based on Laval nozzle
文章编号:
1673-193X(2018)-11-0026-07
作者:
刘勇12 张慧栋12魏建平12张娟12
(1.河南省瓦斯地质与瓦斯治理重点实验室(省部共建国家重点实验室培育基地), 河南 焦作 454000;2.煤炭安全生产河南省协同创新中心,河南 焦作 454000)
Author(s):
LIU Yong12 ZHANG Huidong12 WEI Jianping12 ZHANG Juan12
(1. State Key Laboratory Cultivation Base for Gas Geology and Gas Control, Henan Polytechnic University, Jiaozuo Henan 454000, China;2. Coal Production Safety Collaborative Innovation Center in Henan Province, Jiaozuo Henan 454000, China)
关键词:
磨料气体射流拉法尔喷嘴质量流量磨料加速
Keywords:
abrasive gas jet Laval nozzle mass flow rate abrasive acceleration
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2018.11.004
文献标志码:
A
摘要:
为明确磨料气体射流中磨料的加速规律,基于拉法尔喷嘴,使用FLUENT软件数值模拟了气体和磨料在直管段、拉法尔喷嘴内部、自由射流段的加速过程,以及入口压力15 MPa时不同质量流量磨料的加速过程;分析了磨料质量流量与喷嘴出口磨料速度和磨料最大速度的关系。研究结果表明:高压气体的加速主要在喷嘴收敛段和扩张段,自由射流段气体速度波动较大;磨料的加速过程与气体具有相似性,主要加速过程在喷嘴内部,自由射流段磨料加速相对较小;恒定入口压力条件下,磨料质量流量与喷嘴出口的磨料速度和磨料的最大速度呈二次函数关系;拟合得到 15 MPa下磨料质量流量与喷嘴出口磨料速度和磨料最大速度的关系式,经验证模拟结果准确度较高。
Abstract:
In order to clarify the acceleration laws of abrasive in the abrasive gas jet, the FLUENT software was used to numerically simulate the acceleration process of gas and abrasive in the straight pipe section, the inside of Laval nozzle and the free jet section, and the acceleration process of abrasive with different mass flow rates under the inlet pressure of 15 MPa based on the Laval nozzle. The relationship between the mass flow rate of abrasive and the abrasive velocity at the nozzle outlet and the maximum abrasive velocity were analyzed. The results showed that the acceleration of high pressure gas was mainly in the convergent and expanding sections of nozzle, and the gas velocity in the free jet section fluctuated greatly. The acceleration process of abrasive was similar to the gas, the main acceleration process was inside the nozzle, and the acceleration of abrasive in the free jet section was relatively small. Under the constant inlet pressure, the relationship between the mass flow rate of abrasive and the abrasive velocity at the nozzle outlet and the maximum abrasive velocity presented the quadratic function. The relationship formulas between the mass flow rate of abrasive and the abrasive velocity at the nozzle outlet and the maximum abrasive velocity under 15 MPa were obtained by the fitting, which had a high accuracy through the verification of simulation results.

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相似文献/References:

[1]温志辉,梁博臣*,刘笑天.磨料特性对磨料气体射流破煤影响的实验研究[J].中国安全生产科学技术,2017,13(5):103.[doi:10.11731/j.issn.1673-193x.2017.05.017]
 WEN Zhihui,LIANG Bochen,LIU Xiaotian.Experimental study on influence of abrasive characteristics on coal breaking by abrasive gas jet[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2017,13(11):103.[doi:10.11731/j.issn.1673-193x.2017.05.017]
[2]刘勇,张涛,魏建平,等.磨料形状对磨料气体射流冲蚀性能的影响研究[J].中国安全生产科学技术,2017,13(11):117.[doi:10.11731/j.issn.1673-193x.2017.11.019]
 LIU Yong,ZHANG Tao,WEI Jianping,et al.Research on influence of abrasive shape on erosion performance of abrasive gas jet[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2017,13(11):117.[doi:10.11731/j.issn.1673-193x.2017.11.019]

备注/Memo

备注/Memo:
收稿日期: 2018-09-16
基金项目: 国家重点研发计划项目(2017YFC0804207);国家自然科学基金项目(51704096);河南理工大学自然科学基金项目(J2018-4)
作者简介: 刘勇,博士,副教授,主要研究方向为射流理论与技术、煤层气开发等。
更新日期/Last Update: 2018-12-03