北京科技大学学报Issue(6)：830-837,8.DOI:10.13374/j.issn1001-053x.2014.06.018
前混合磨料水射流除鳞喷嘴混合腔内部流场
Internal mixing chamber flow field of a premixed abrasive water jet descaling nozzle
刘国勇 1陈欣欣 1朱冬梅 1张少军 1陈继东1
作者信息
- 1. 北京科技大学机械工程学院，北京 100083
- 折叠
摘要
Abstract
Numerical simulation was performed to study the internal mixing chamber flow field of a premixed abrasive water jet de-scaling nozzle by FLUENT software based on a CFD (computational fluid dynamics) multiphase flow mixture model. The effects of ab-rasive supply modes as well as different parameters under bilateral high-pressure water entrances such as abrasive and high-pressure wa-ter inlet diameters, high-pressure water inlet location and angle, and contraction cone angle on the flow field uniformity were analyzed to obtain reasonable structure parameters. Numerical calculation results show that the mixing uniformity of the internal mixing chamber for the abrasive entering by the central entrance mode is superior to that by the bilateral entrance mode at constant entrance velocity. The jet velocity out of the internal mixing chamber increases with the increasing abrasive and high-pressure water inlet diameters, but the outlet abrasive concentration increases firstly and then decreases as the high-pressure water inlet diameter increases. The location of bilateral high-pressure water entrances has relatively little effect on the mixing uniformity of the internal mixing chamber. When the mass flow ratio of abrasive to high-pressure water is about 3: 4, and when the high-pressure water inlet angle and contraction cone angle are set at 30°, a relatively uniform flow field can be obtained.关键词
喷嘴/除锈/多相流/磨料/水射流/流场/数值分析Key words
nozzles/descaling/multiphase flow/abrasives/water jet/flow fields/numerical analysis分类
矿业与冶金引用本文复制引用
刘国勇,陈欣欣,朱冬梅,张少军,陈继东..前混合磨料水射流除鳞喷嘴混合腔内部流场[J].北京科技大学学报,2014,(6):830-837,8.
