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科技导报
| 研究论文 2015, 33(2): 49-53
运用变转速法计算离心泵启动停机的瞬态流动性能
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黄思1 , 张杰1 , 张雪娇1 , 区国惟2
作者信息
1. 华南理工大学机械与汽车工程学院, 广州510640;
Numerical simulation of transient flow performance during starting and stopping processes in centrifugal pump by varied-speed method
Affiliations
出版时间: 2015-01-28
doi: 10.3981/j.issn.1000-7857.2015.02.006
文章导航
离心泵启动和停机等问题归根结底是离心泵水力性能随转速变化的瞬态过程。以常用的IS125 型管道离心水泵为例,在数值模拟中采用叶轮转速随时间变化的CFD 计算方法,研究离心泵开机、停机等变转速过程中水泵内部流动状态以及外特性的动态变化。整个模拟计算过程包括泵启动、正常运行、停机和停机后4 个阶段。模拟计算得到了4 个阶段不同时刻泵内流场分布状况,得到了4个阶段流量扬程等水泵外特性参数随时间的变化规律,可为改善水泵的设计性能和实际运行性能提供理论依据。
变转速方法
/
离心泵启动停机
/
非定常流场
/
数值模拟
The starting and stopping processes of a centrifugal pump are essentially transient processes, where the hydraulic performance changes with the rotational speed of the pump. In this paper, the CFD simulation is made by changing the impeller rotational speed over time for the type IS125 centrifugal pump to study the transient internal flow field and the external performance of the pump during starting and stopping processes. The entire simulation consists of four stages, including the startup, the normal running, the stopping and post-stopping of the pump. The variations of the flow field are obtained from the transient simulation. The flow-rate, the head and other external performance parameters against time are also obtained, which can be used in pump designs and actual operations.
varied-speed method
/
starting and stopping processes of centrifugal pump
/
transient flow field
/
numerical simulation
黄思, 张杰, 张雪娇, 区国惟.
运用变转速法计算离心泵启动停机的瞬态流动性能.
科技导报,
2015
, 33
(2)
: 49
-53
.
DOI: 10.3981/j.issn.1000-7857.2015.02.006
HUANG Si, ZHANG Jie, ZHANG Xuejiao, OU Guowei.
Numerical simulation of transient flow performance during starting and stopping processes in centrifugal pump by varied-speed method[J].
Science & Technology Review ,
2015
, 33
(2)
: 49
-53
.
DOI: 10.3981/j.issn.1000-7857.2015.02.006
2015年第33卷第2期
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文章信息
doi: 10.3981/j.issn.1000-7857.2015.02.006
接收时间：2014-11-18
首发时间：2015-02-09
出版时间：2015-01-28
收稿日期：2014-11-18
修回日期：2014-12-17
https://castjournals.cast.org.cn/joweb/kjdb/CN/10.3981/j.issn.1000-7857.2015.02.006
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2种不同金属材料的力学参数
科 属数 种数 占总种数比例 属 种数 占总种数比例 鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78 小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39 多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39 红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87 小菇属 Mycena 11 5.26 光柄菇属 Pluteus 5 2.39 红菇属 Russula 17 8.13 栓菌属 Trametes 5 2.39
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