基于RSM的呼吸性粉尘旋风分离器分离效能数值模拟研究

Numerical analysis on the respirable dust separation efficiency of cyclone separator using response surface methodology

为研究满足BMRC曲线的呼吸性粉尘旋风分离器,利用流体力学软件Fluent 6.3对不同结构尺寸旋风分离器内部流场进行数值模拟,并基于响应曲面法、利用统计软件Design-Expert得到了呼吸性粉尘旋风分离器分离效能二次多项式预测模型。通过方差分析及回归方程系数显著性检验可知呼吸性粉尘旋风分离器筒体高度、排气管直径及插入深度对其分离效能有显著影响。根据预测模型加工旋风分离器样件并作实测验证,发现样件分离效能与BMRC曲线标准差为3.16%,小于5%。使用响应曲面法研究呼吸性粉尘旋风分离器分离效能可提高设计效率,保证计算模型可靠性,同时为满足EN481,PM10及PM2.5分离器的设计提供参考。

In order to study the respirable dust cyclone separator,that meet the BMRC curve,the inner flow fields of cyclone separators with various geometries were simulated by commercial computational fluid dynamics( CFD) software Fluent 6. 3. Based on the response surface methodology and using the statistical software Design-Expert,the quadratic polynomial prediction model of cyclone sampling efficiency was obtained. The results show that the tube length,vortex finder diameter and vortex finder height have significant effect on the cyclone performance. The sample cyclone separator was made based on prediction model and tested,it was found that the standard deviations of cyclone separator designed by RSM and BMRC curve was 3. 16% which was less than 5%. The study shows that RSM not only improves work efficiency,but also ensures the reliability of calculation model,at the same time,provides a reference for the design of separator to meet the requirements of EN481,PM10 and PM2. 5.