袁惠新;凌继万;付双成;周发戚;

• 1:常州大学机械工程学院
• 2:江苏省绿色过程装备重点实验室

摘要(Abstract)：

颗粒的分级作为目前粉体材料加工与应用的基本技术之一,已被广泛的应用于各个领域,如矿物加工与分选、冶金等方面。旋风分离器的主要结构参数对旋风分离器内的流场影响最大,但目前鲜有人研究其对分级的影响。通过对旋风分离器的锥角与排气管插入深度进行数值模拟研究,采用非稳态离散项模型与雷诺应力模型的方法研究其对压力降与分级性能的影响。结果表明:排气管插入深度对分级粒径和分级精度都有显著的影响,插入深度过小甚至没有插入深度都对分级精度的提高不利,但插入深度增大会增大分级粒径和压力降;对于分级精度,锥角存在最佳值,但分级粒径和压力降都随锥角的增大而增大;最佳锥角值与溢流管插入深度有关,其随着溢流管插入深度的增大而减小;自然旋风长在分级精度曲线峰值处保持在一个稳定的范围内,对于柱段长度与入口结构不变的情况,自然旋风长在3.2 D～3.5 D之间分级精度较高。

关键词(KeyWords)： 分级;锥角;排气管插入深度;数值模拟;自然旋风长

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(21676031)

作者(Author): 袁惠新;凌继万;付双成;周发戚;

Email:

DOI:

参考文献(References)：

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