An asymmetric anchor impeller was proposed to improve mixing performance of anchor-type impellers by reducing unmixed regions, where materials transport is limited. Dynamical structures of various anchor-type impellers were analyzed systematically with numerical Poincaré sections and flow visualization. Design parameters of basic anchor-type impellers, such as the blade width, the position and width of the support beam, and the presence of the bottom blade were investigated, along with comparison to dynamical systems formed by the standard anchor impeller. An optimal design was selected by incorporating two basic type impellers having a large difference in dynamical systems. The optimal impeller was composed of two different half impellers, which was found to improve the materials transport via the streamline crossing mechanism. The total power draw required for agitation was also found a bit lower in the optimal asymmetric anchor impeller than that in the standard one.

提出了一种不对称的锚式叶轮，以通过减少物料输送受限的未混合区域来提高锚式叶轮的混合性能。利用数值庞加莱截面和流量可视化系统地分析了各种锚式叶轮的动力结构。研究了基本锚式叶轮的设计参数，例如叶片宽度，支撑梁的位置和宽度以及底部叶片的存在，并与标准锚式叶轮形成的动力系统进行了比较。通过结合两个在动力系统上有很大差异的基本型叶轮来选择最佳设计。最佳叶轮由两个不同的半叶轮组成，通过流线交叉机制可以改善物料的输送。