Experimental Investigation of Flow Patterns in a Pump Intake with Different CWL (Critical Water Level) and Back-Wall Clearance
Experimental Investigation of Flow Patterns in a Pump Intake with Different CWL (Critical Water Level) and Back-Wall Clearance
复制标题
不同 CWL（临界水位）和后壁间隙的泵入口流动模式的实验研究
DOI：
10.1007/s11630-021-1463-y
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发表时间：
2021-05
影响因子：
2.5
通讯作者：
WANG Fujun
中科院分区：
文献类型：
--
作者：
GUO Miao;TANG Xuelin;LI Xiaoqin;WANG Fujun
在本研究中，针对不同情况，从实验和理论上研究了后壁间隙、CWL（临界水位）和水中空气含量对泵入口流动模式的影响。统计数据表明，在较低流量下，两相流的CWL低于单相流，并且随着流量的增加，这种趋势完全相反。在亚临界、临界和超临界流量条件下获得的精细实验数据表明，后壁间隙越大，存在的涡越多，自由表面涡的涡度越高。对于最小的后壁间隙，通过入口的流量占据了管罩下方的大部分空间，并且该流量和来自后壁的流入相对于轴线以外的某一垂直线是不对称的。对于较大和最大的后壁间隙，来自入口和后壁的流量相对于管罩的垂直轴线几乎对称。不同后壁间隙大小的两条PIV测量线上的速度分布表明，最小后壁间隙影响管喇叭口周围的流动。
In this study, influence of back-wall clearance, CWL (Critical Water Level) and air content in water on flow patterns in a pump intake has been investigated experimentally and theoretically for different cases. The statistical data show that CWL for a two-phase flow is lower than that in the case of a single-phase flow at a relatively low flow rate, and as the flow rate increases, this trend turns out to be completely reversed. Fine experimental data obtained under conditions of subcritical, critical and supercritical flow rates have revealed that the larger the back-wall clearance is, the more vortices exist and the higher the vorticity of free-surface vortices is. For the smallest back-wall clearance, the flow coming through the inlet occupies most space under the pipe bell, and both this flow and the inflow coming from the back wall are asymmetric relative to a certain vertical line other than the axis. For the larger and the largest back-wall clearances, the flows coming from the inlet and from the back wall are almost symmetrical relative to the vertical axis of the pipe bell. The velocity distributions on two PIV measurement lines for different back-wall clearance magnitudes indicate that the smallest back-wall clearance influences the flow around the pipe bell.
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DOI：
10.1177/2041298310393447
发表时间：
2011-06
期刊：
Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science
影响因子：
--
作者：
X. Tang;Fujun Wang;Y. Li;G. Cong;X. Shi;Y. Wu;L. Qi
通讯作者：
X. Tang;Fujun Wang;Y. Li;G. Cong;X. Shi;Y. Wu;L. Qi
影响因子：
2.4
作者：
N. Yıldırım;Fikret Kocabas
通讯作者：
N. Yıldırım;Fikret Kocabas
影响因子：
2.4
作者：
M. Padmanabhan;G. Hecker
通讯作者：
M. Padmanabhan;G. Hecker
影响因子：
3.2
作者：
L. Cristofano;M. Nobili;G. Caruso
通讯作者：
L. Cristofano;M. Nobili;G. Caruso
影响因子：
2.4
作者：
Echávez, G;McCann, E
通讯作者：
McCann, E