电除尘器电流体动力学流动与极间干扰的数值模拟研究

Numerical Simulation Research on Electro-Hydrodynamics Flow and Interelectrode Interference of Electric Precipitator

对单电极和多电极电除尘器内部流动建立了三维数值模型,研究了电流体动力学（ EHD ）流和极间干扰对电除尘器内部流动特性的影响.电场分布由泊松方程和电流连续性方程控制,气体流动由三维不可压缩的 Navicr-Stokcs方程结合标准ke湍流模型来描述,气体流动和电场通过库仑力耦合计算.模拟结果显示： EHD流使 得电极前后分别形成两个对称的涡,随着气流进口速度的提高,上下涡核朝相反的方向移动; EHD流通过同时提高 湍流耗散率和湍动能的生成来影响湍流强度,其结果取决于哪个作用占优势.结果发现：电极之间会产生极间干扰,中间电极前后由于电势和空间电荷密度分布的挤压作用使得涡强度明显减小,并且结构更规则.

In this paper,the depth map inference algorithm in the process of 2Dto 3Dvideo conversion was studied,the depth map inference process is based on the unit of macroblock in video compression domain.The research chose the different inference strategies based on different macroblock types.First,motion vectors for the intra-frame macroblocks were calculated by using the neighboring block based motion estimation algorithm.Then,for intra-frame macroblocks,the motion vectors directly extracted are filtered to improve the robustness.Finally,the depth maps are acquired via motion compensation and an up-sample bilateral filter technique.Experimental results demonstrate that the proposed scheme can generate smooth and reliable depth maps with higher quality.