The development of flow control methods in the centrifugal pump relies on further understanding of the characteristics of vortex structures and their irreversible losses. In this paper, the detached eddy simulation is conducted on a model centrifugal pump, which shows a good agreement with the experiment. Combining with three generations of vortex identification methods (vorticity, Q criterion, omega and Liutex methods) and entropy production analysis, the results show omega and Liutex methods are highly recommended to analyze the vortex structures. Vorticity is the key factor to promote the energy dissipation, and the irreversible losses of vortex areas can be lower than their surroundings when there exists smaller vorticity or higher rotation strength. Concerning the pressure pulsation induced by vortex shedding, it is unreasonable to analyze this unsteady process via vortex structures identified by iso-surface because of the restriction of the threshold. In comparison, the change of integral length is more related to the pressure pulsation.

离心泵中流量控制方法的发展取决于对涡旋结构及其不可逆损失的进一步了解。本文在模型离心泵上进行了分离涡模拟，与实验结果吻合良好。与三代涡旋识别方法（涡度，Q标准，omega和Liutex方法）和熵产生分析，结果表明，强烈建议使用omega和Liutex方法来分析涡旋结构。涡度是促进能量消散的关键因素，当存在较小的涡度或较高的旋转强度时，涡旋区的不可逆损失可以低于其周围环境。关于涡旋脱落引起的压力脉动，由于阈值的限制，通过等值面识别的涡旋结构来分析这种不稳定过程是不合理的。相比之下，积分长度的变化与压力脉动关系更大。