基于阻力的V型褶式滤芯结构参数的响应面法优化

Optimization of Structural Parameters for the Pleated Filter Element of Cartridge Filters by Response Surface Methodology Based on the Resistance

应用计算流体力学方法建立褶式滤芯阻力的二维计算模型,对其气相流场进行了数值模拟,并与文献结果比较.在此模型基础上,利用响应面法研究了褶高(h)、褶间距(W)和过滤风速(Vf)对V型褶式滤芯阻力的影响,得出了预测模型,并对滤芯结构参数和运行条件进行了优化.结果表明,滤芯阻力的模拟值和文献计算值变化趋势一致;h,W及Vf对滤芯阻力均有影响,但影响显著性Vf>W>h;滤芯阻力随Vf近似呈线性增大,当Vf一定时,存在最优W值使滤芯阻力最小,且最优W值随h增大而增大;在本研究的各参数范围内,最佳结构参数h=25 mm,W=10.899 mm,最佳运行参数Vf=0.005 m/s.

A two-dimensional numerical model of pleated filter element on resistance was established by CFD method, and its gas flow field simulated. The simulated values and values in reference in the resistance were compared. On the basis of this numerical model, the effects of pleat height （h）, pleat spacing （W）, and filtration velocity （Vf） of the filter element on the resistance of V-pleated filter element were studied by response surface method, the quadratic polynomial prediction model on the three impact factors was also developed, and the structural parameters and operating condition were optimized. The results show that the simulated values of the resistance are basically the same as those in reference, h, W and Vf have effect on the resistance, but the effect of Vf is obviously more significant than that of W, and the effect of W more significant than that of h. The relationship between the resistance and Vf is approximately linear, and the resistance increases with the increase of Vf, the optimal values of Wwhich minimize the resistance can be obtained when Vf is a given value, and the optimal value of W increases with the increase of h. Within the ranges of parameters in this study, the optimal values of structural parameters are h=25 mm, and W=10.899 mm, respectively, and the optimal value of operating condition is Vf=0.005 m/s.