装置元件排列间距和颗粒浓度对细颗粒湍流聚并的影响
发布时间:2018-11-17 13:34
【摘要】:通过数值模拟研究锯齿形元件组成的细颗粒聚并装置的湍流聚并特性,考察元件的排列间距和气流中颗粒物浓度对湍流聚并的影响。计算采用RANS模型,并获得了实验的验证。模拟结果表明,元件阵列的排列既不能过于紧密也不能过于稀疏,需要兼顾空间利用率、元件产涡的耦合作用和流动阻力三方面的考虑。实际应用也需要考虑颗粒浓度的影响,模拟发现:浓度越高,颗粒的湍流聚并效果越好;当浓度足够高时,Z形锯齿元件组成的聚并装置能聚并近50%的小颗粒,具有实用价值。
[Abstract]:In this paper, the turbulent aggregation characteristics of a fine particle aggregation device composed of zigzag elements are studied by numerical simulation, and the effects of the array spacing of the elements and the concentration of particles in the airflow on the turbulent aggregation are investigated. The RANS model is used and the experimental results are verified. The simulation results show that the array of elements can not be arranged too closely or sparsely. It is necessary to take into account the space utilization, the coupling effect of vortex production and the flow resistance. The effect of particle concentration should also be considered in practical application. It is found that the higher the concentration is, the better the effect of particle aggregation is. When the concentration is high enough, the device composed of zigzag elements can aggregate nearly 50% of small particles, which is of practical value.
【作者单位】: 北京大学工学院;武汉利康能源有限公司;
【基金】:国家自然科学基金(煤炭联合基金)资助课题(批准号:U1361101)~~
【分类号】:O347.7
本文编号:2337969
[Abstract]:In this paper, the turbulent aggregation characteristics of a fine particle aggregation device composed of zigzag elements are studied by numerical simulation, and the effects of the array spacing of the elements and the concentration of particles in the airflow on the turbulent aggregation are investigated. The RANS model is used and the experimental results are verified. The simulation results show that the array of elements can not be arranged too closely or sparsely. It is necessary to take into account the space utilization, the coupling effect of vortex production and the flow resistance. The effect of particle concentration should also be considered in practical application. It is found that the higher the concentration is, the better the effect of particle aggregation is. When the concentration is high enough, the device composed of zigzag elements can aggregate nearly 50% of small particles, which is of practical value.
【作者单位】: 北京大学工学院;武汉利康能源有限公司;
【基金】:国家自然科学基金(煤炭联合基金)资助课题(批准号:U1361101)~~
【分类号】:O347.7
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