Study on characteristics of vortex structures and irreversible losses in the centrifugal pump

Study on characteristics of vortex structures and irreversible losses in the centrifugal pump
复制标题

离心泵涡流结构特性及不可逆损失研究

DOI:
10.1177/0957650920983061
复制
发表时间:
2020-12
期刊:
Proceedings of the Institution of Mechanical Engineers - Part A: Journal of Power and Energy
影响因子:
--
通讯作者:
Lu Bohui
Lu Bohui
中科院分区:
其他
文献类型:
--
作者:
Yuan Zhiyi;Zhang Yongxue;Wang Cong;Lu Bohui

文献摘要

参考文献

被引文献

相似文献

离心泵内流动控制方法的发展依赖于对旋涡结构特性及其不可逆损失的进一步认识。本文对一模型离心泵进行了脱体涡模拟,模拟结果与实验结果吻合较好。结合三代涡旋识别方法(涡度、Q准则、Omega和Liutex方法)和熵产生分析,结果表明Omega和Liutex方法是分析涡旋结构的推荐方法。涡量是促进能量耗散的关键因素,当涡量较小或旋转强度较大时,涡区的不可逆损失可以低于周围环境。对于旋涡脱落引起的压力脉动,由于阈值的限制,用等值面识别旋涡结构来分析这一非定常过程是不合理的。相比之下,积分长度的变化与压力脉动的关系更大。
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.
DOI: 10.1007/s42241-018-0046-1
发表时间: 2018-05
影响因子: 2.5
作者:
Yuning Zhang;Kaihua Liu;Jinwei Li;Haizhen Xian;Xiaoze Du
通讯作者: Xiaoze Du
DOI: 10.1142/p219
发表时间: 2000-12
期刊: --
影响因子: --
作者:
Sheng-cai Li
通讯作者: Sheng-cai Li
DOI: 10.1115/1.3650846
发表时间: 1965-12
期刊: Journal of Basic Engineering
影响因子: --
作者:
G. M. Wood;H. Welna;R. Lamers
通讯作者: G. M. Wood;H. Welna;R. Lamers
DOI: 10.1016/j.ijheatfluidflow.2018.04.016
发表时间: 2018-08
影响因子: 2.6
作者:
Beomjun Kye;Keuntae Park;Haecheon Choi;Myungsung Lee;Joo-Han Kim
通讯作者: Beomjun Kye;Keuntae Park;Haecheon Choi;Myungsung Lee;Joo-Han Kim
DOI: 10.1007/s00348-014-1820-7
发表时间: 2014-09
影响因子: 2.4
作者:
J. Keller;E. Blanco;R. Barrio;J. Parrondo
通讯作者: J. Keller;E. Blanco;R. Barrio;J. Parrondo