煤炭工程 ›› 2014, Vol. 46 ›› Issue (6): 115-117.doi: 10.11799/ce201406039

• 研究探讨 • 上一篇    下一篇

基于CFD的气液两相射流引射器设计模拟研究

乔时和1,林柏泉2,段永生3,4,杨威1   

  1. 1. 中国矿业大学 安全工程学院 煤炭资源开采与安全国家重点实验室
    2. 中国矿业大学安全工程学院;煤炭资源与安全开采国家重点实验室
    3. 中国天辰工程有限公司
    4.
  • 收稿日期:2013-12-15 修回日期:2014-02-24 出版日期:2014-06-10 发布日期:2014-06-16
  • 通讯作者: 乔时和 E-mail:qshcumt@163.com
  • 基金资助:

    国家重点基础研究发展(973)计划;国家自然科学基金项目;国家科技支撑计划

The design of gas-liquid two-phase jet ejector based on CFD simulation

  • Received:2013-12-15 Revised:2014-02-24 Online:2014-06-10 Published:2014-06-16

摘要:

本文采用Fluent模拟软件对气液两相引射器的最优尺寸进行了数值模拟研究,并分析了引射压力和出口背压对引射器工况的影响。研究结果表明:引射器内射流喷嘴直径受流场发育情况、压力特性曲线和气相体积浓度等因素的影响和制约,综合考虑这四种因素,确定了喷嘴直径范围为16mm~20mm;当引射压力一定时,随着出口背压的增大,气相流量、气相浓度和出口流速均逐渐减小;当出口背压一定时,射流气相浓度随引射压力的增大呈逐渐上升趋势。这对设计气液两相引射器,改进水射流结构,完善水力割缝技术具有一定的指导作用。

关键词: CFD模拟, 水力割缝, 气液两相射流, 引射器

Abstract:

In this paper, numerical simulations were carried out to study the optimal size of gas-liquid two-phase ejector using Fluent simulation software, and the influence of injecting pressure and outlet pressure to ejector conditions. The results showed that the jet nozzle diameter in ejector was affected and restricted by the factors such as flow field development, pressure characteristic curve and phase volume concentration, the nozzle diameter was in the range of 16 mm~20 mm considering these four factors; When the injection pressure was constant, gas flow rate, gas concentration and velocity decreased with the increase of the outlet pressure; When the outlet pressure was constant, jet gas phase concentration was on the rise with the increase of injection pressure. This will have a certain guiding significance to the design of gas-liquid ejector, and improve water jet structure, and perfect the hydraulic cutting seam technology.

Key words: CFD simulation, hydraulic slotting, gas-liquid two-phase jet, injector 1 引言