管道射流清洗喷嘴流场的数值模拟与分析

发布时间：2018-01-10 05:15

本文关键词：管道射流清洗喷嘴流场的数值模拟与分析　出处：《煤炭工程》2017年05期 　论文类型：期刊论文

【摘要】：以用于矿井主排水管道射流清洗的圆柱形喷嘴为研究对象,利用FLUENT软件对喷嘴内外部流场进行数值模拟,通过改变不同射流压力、不同冲击角、不同环境介质和靶距来分析喷嘴射流的流场特性,得到了流场的射流速度、动压力、靶面所受的打击压力、剪应力等仿真结果。结果表明:靶面所受最大打击压力和剪应力与射流压力呈线性关系变化;冲击角为60°时,射流清洗效果较好;在空气和水两种环境介质下,当靶距增加时射流打击力先增大后减小,不同的射流参数值对应着一个最佳靶距;当射流压力相同时,环境介质为空气的射流清洗能力显著优于环境介质为水的射流。
[Abstract]:Taking the cylindrical nozzle used for jet cleaning of mine main drainage pipeline as the research object, the flow field inside and outside the nozzle was simulated by using FLUENT software. By changing different jet pressure and different impact angle, the internal and external flow field of the nozzle was simulated numerically. The characteristics of the jet flow field are analyzed in different environment media and target distance, and the jet velocity, dynamic pressure and the impact pressure on the target surface are obtained. The results show that the maximum impact pressure and shear stress on the target surface are linearly related to the jet pressure. When the impact angle is 60 掳, the effect of jet cleaning is better. In the air and water environment, the jet strike force increases first and then decreases when the target distance increases, and the different jet parameters correspond to an optimal target distance. When the pressure of the jet is the same, the cleaning ability of the air jet is better than that of the water jet.
【作者单位】：中国矿业大学(北京)机电与信息工程学院;乌鲁木齐职业大学;
【分类号】：O358;TD442
【正文快照】： 在我国煤矿的矿井中,矿井水含有许多煤泥等悬浮物以及一些难溶盐类[1],容易在管壁上结垢,排水管路长期运行,很少清理,因此管壁结垢较厚,影响管道的正常输送功能。如果采用高压水射流对管道内部进行冲洗,则可以保证管道正常输送[2]。高压水射流清洗管道技术是用高压水装置将流

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