基于二维叉排管束模型的刷式密封旋涡分离点分析
发布时间：2019-04-19 23:45
【摘要】：为了进一步研究刷丝束内部气体流动,建立了刷丝束截面的二维紧凑叉排管束模型,运用Fluent软件对其进行气体流动数值模拟.首先根据网格独立性的判别标准,分析了网格加密程度对刷式密封数值模拟结果的影响,并以气流速度、压降和气体质量泄漏率的相对变化率作为网格独立性检验的参考量,得到独立于计算精度的大致网格数.其次,模拟分析了不同排距管束模型在各压差下的气体流动,得到分离点S与刷丝间距和上下游压差之间的关系.计算结果表明:网格数在400 000左右时对数值模拟结果误差在2%以下,网格独立.分离点S位置在经历前1~2排刷丝束时逐渐向下游移动,最后趋于稳定.随着刷丝间距和上下游压差的增大,分离点S均会沿着刷丝表面发生后移,且位置在高压差条件下相对变化不大.
[Abstract]:In order to further study the gas flow inside the brush bundle, a two-dimensional compact cross-section model of the cross-section of the brush bundle is established, and the gas flow is numerically simulated by using Fluent software. Firstly, according to the criterion of grid independence, the influence of mesh density on the numerical simulation results of brush seal is analyzed, and the relative change rate of gas flow velocity, pressure drop and gas mass leakage rate is taken as the reference of grid independence test. The approximate mesh number independent of the computational accuracy is obtained. Secondly, the gas flow under different pressure difference is simulated and analyzed, and the relationship between the separation point S and the distance between brush and wire and the pressure difference between upstream and downstream is obtained. The results show that the error of the numerical simulation is less than 2% when the grid number is about 400,000, and the grid is independent. The S position of the separation point moves downstream gradually and tends to be stable at the end of the first 1 ~ (2) row of brush filaments. With the increase of brush-wire spacing and the pressure difference between upstream and downstream, the separation point S will move backward along the brush surface, and the position of the separation point will change little under the condition of high pressure difference.
【作者单位】： 昆明理工大学机电工程学院;
【基金】：云南省科技计划项目(2012FB130) 昆明理工大学分析测试基金资助项目(2016M20152203034)
【分类号】：TB42
本文编号：2461402
[Abstract]:In order to further study the gas flow inside the brush bundle, a two-dimensional compact cross-section model of the cross-section of the brush bundle is established, and the gas flow is numerically simulated by using Fluent software. Firstly, according to the criterion of grid independence, the influence of mesh density on the numerical simulation results of brush seal is analyzed, and the relative change rate of gas flow velocity, pressure drop and gas mass leakage rate is taken as the reference of grid independence test. The approximate mesh number independent of the computational accuracy is obtained. Secondly, the gas flow under different pressure difference is simulated and analyzed, and the relationship between the separation point S and the distance between brush and wire and the pressure difference between upstream and downstream is obtained. The results show that the error of the numerical simulation is less than 2% when the grid number is about 400,000, and the grid is independent. The S position of the separation point moves downstream gradually and tends to be stable at the end of the first 1 ~ (2) row of brush filaments. With the increase of brush-wire spacing and the pressure difference between upstream and downstream, the separation point S will move backward along the brush surface, and the position of the separation point will change little under the condition of high pressure difference.
【作者单位】： 昆明理工大学机电工程学院;
【基金】：云南省科技计划项目(2012FB130) 昆明理工大学分析测试基金资助项目(2016M20152203034)
【分类号】：TB42
【相似文献】
相关期刊论文 前2条
1 马士华;董凤娜;;信息流分离点与物流分离点相结合的物流敏捷性研究[J];工业工程与管理;2006年02期
2 ;[J];;年期
相关硕士学位论文 前2条
1 董凤娜;基于时间竞争的物流与信息流分离点协同性研究[D];华中科技大学;2006年
2 张岭;制造业价值提供点和订单分离点定位组合研究[D];燕山大学;2012年
，本文编号：2461402
本文链接：https://www.wllwen.com/guanlilunwen/gongchengguanli/2461402.html
