圆形喷嘴水射流流场及形态结构特征分析*

doi:10.16265/j.cnki.issn1003-3033.2021.10.012

中国安全科学学报 ›› 2021, Vol. 31 ›› Issue (10): 82-88.doi: 10.16265/j.cnki.issn1003-3033.2021.10.012

圆形喷嘴水射流流场及形态结构特征分析^*

高亚斌讲师, 郭晓亚, 向鑫, 韩培壮, 唐一博副教授

太原理工大学安全与应急管理工程学院,山西太原 030024

收稿日期:2021-07-15 修回日期:2021-09-10 出版日期:2021-10-28 发布日期:2022-04-28
作者简介:高亚斌 (1988—),男,山西洪洞人,博士,讲师,主要从事煤矿瓦斯灾害防治方面的研究。Email: 135gyb248@163.com。
基金资助:
国家自然科学基金资助(51804212)。

Analysis on flow field and shape structure of circular nozzle water jet

GAO Yabin, GUO Xiaoya, XIANG Xin, HAN Peizhuang, TANG Yibo

School of Safety and Emergency Management Engineering, Taiyuan University of Technology, Taiyuan Shanxi 030024, China

Received:2021-07-15 Revised:2021-09-10 Online:2021-10-28 Published:2022-04-28

摘要/Abstract

摘要： 为改进和优化圆形喷嘴水射流技术在煤矿中的应用,基于圆形喷嘴射流结构与速度分布理论,运用COMSOL数值模拟软件,并借助高速摄像技术,分析圆形喷嘴水射流流场及形态结构特征。结果表明:圆形喷嘴水射流结构分为初始段、过渡段、基本段和消散段,射流具有扩散性;水射流轴线速度分布均具备分段函数特性,该速度是出口压力和射流头到喷嘴距离的函数,而射流断面速度分布具有自模性,各断面速度分布可视为高斯分布;水射流在切割、冲蚀煤岩体初始会有约400 ms 的冲击滞后,在400~800 ms之间主体结构形成,800 ms之后整体结构趋于稳定。

关键词: 圆形喷嘴, 水射流流场, 形态结构, 射流结构, 半宽度, 核心区

Abstract: In order to improve and optimize application of circular nozzle water jet technology in coal mines, based on theory of jet structure and velocity distribution of circular nozzle, flow field and morphological structure characteristics of the water jet were analyzed by using COMSOL numerical simulation software and high-speed camera technology. The results show that its structure can be divided into initial segment, transition segment, basic segment and dissipation segment, and the jet flow has diffusivity. Distribution of its axial velocity features piecewise function, and this velocity is a function of outlet pressure and distance from jet head to nozzle, while velocity distribution at jet section features self-mode, and that at each section can be regarded as a Gaussian distribution. At the beginning of cutting and erosion of coal and rock mass by water jet, there is about 400 ms of impact lag, main structure will be formed between 400 and 800 ms, and overall structure tends to be stable after 800 ms.

Key words: circular nozzle, water jet flow field, morphological structure, jet structure, half width, core area

中图分类号:

X924.2

高亚斌, 郭晓亚, 向鑫, 韩培壮, 唐一博. 圆形喷嘴水射流流场及形态结构特征分析^*[J]. 中国安全科学学报, 2021, 31(10): 82-88.

GAO Yabin, GUO Xiaoya, XIANG Xin, HAN Peizhuang, TANG Yibo. Analysis on flow field and shape structure of circular nozzle water jet[J]. China Safety Science Journal, 2021, 31(10): 82-88.

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圆形喷嘴水射流流场及形态结构特征分析^*

Analysis on flow field and shape structure of circular nozzle water jet

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