Cavitation effects on pressure fluctuation in pump-turbine hump region

空化 尾水管 机械 回流 振荡(细胞信号) 抽吸 涡轮机 涡流 叶轮 不稳定性 材料科学 振幅 降低频率 振动 物理 声学 热力学 湍流 化学 机械工程 工程类 光学 雷诺数 入口 生物化学
作者
Deyou Li,Yutong Zhu,Song Lin,Ruzhi Gong,Hongjie Wang,Xingqi Luo
出处
期刊:Journal of energy storage [Elsevier BV]
卷期号:47: 103936-103936 被引量:28
标识
DOI:10.1016/j.est.2021.103936
摘要

• Large eddy simulations considering cavitation in a pump-turbine were performed. • Effect mechanism of cavitation on pressure fluctuation in the hump region was analyzed. • Characteristic frequencies in each component in hump region were determined. The hump characteristic is one of unique instability issues of pump-turbines, which limits the stable and sable range of pumped storage power units. Recent studies show that the hump characteristic has related with cavitation. Hence, in this study, large eddy simulations with cavitation effects were performed to reveal the mechanism of cavitation on pressure fluctuation in a pump-turbine hump region. Numerical results were validated using pressure fluctuation experiments. The results showed that the occurrence of cavitation leads to characteristic frequencies of 1.344 f n ( f n is runner rational frequency) in the draft tube and 2.88 f n in the runner. Detailed analyses revealed that the characteristic frequency of 1.344 f n originated from the periodic oscillation of backflow at the draft tube outlet, while the characteristic frequency of 2.88 f n was caused by the periodic occurrence and collapse of cavitation on the suction surfaces of the blades. In addition, the occurrence of cavitation increased the amplitude of the pressure fluctuation by the frequency of 0.144 f n in the stay and guide vanes, which was caused by the periodic rotation of three low-pressure regions formed at the runner outlet and the three low-speed blocking vortices in the stay vanes.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
zhuzhuxia完成签到,获得积分20
1秒前
小马甲应助KobeLaoda采纳,获得10
1秒前
zrx发布了新的文献求助10
1秒前
琦趣q发布了新的文献求助10
1秒前
雪白巨人发布了新的文献求助10
2秒前
3秒前
李健应助22采纳,获得10
3秒前
mirrovo发布了新的文献求助10
4秒前
ky幻影发布了新的文献求助10
4秒前
ding应助酷酷的小鹿采纳,获得10
4秒前
5秒前
我爱科研发布了新的文献求助10
5秒前
李健应助我是大帅哥采纳,获得10
6秒前
6秒前
大个应助memedaaaah采纳,获得10
7秒前
塔塔发布了新的文献求助10
8秒前
打打应助Carrot采纳,获得10
8秒前
9秒前
量子星尘发布了新的文献求助10
9秒前
9秒前
Mars_1108发布了新的文献求助10
10秒前
kkk完成签到,获得积分10
10秒前
12秒前
12秒前
nanfeng发布了新的文献求助10
14秒前
zrx完成签到,获得积分10
14秒前
xiamu发布了新的文献求助10
14秒前
15秒前
16秒前
无限映波完成签到,获得积分10
17秒前
22发布了新的文献求助10
17秒前
共享精神应助科研通管家采纳,获得10
18秒前
慕青应助科研通管家采纳,获得10
18秒前
18秒前
yar应助科研通管家采纳,获得10
18秒前
思源应助科研通管家采纳,获得20
18秒前
小马甲应助科研通管家采纳,获得10
18秒前
smottom应助科研通管家采纳,获得30
18秒前
脑洞疼应助科研通管家采纳,获得10
19秒前
天天快乐应助科研通管家采纳,获得10
19秒前
高分求助中
Picture Books with Same-sex Parented Families: Unintentional Censorship 700
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
Effective Learning and Mental Wellbeing 300
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3975339
求助须知:如何正确求助?哪些是违规求助? 3519670
关于积分的说明 11199199
捐赠科研通 3256002
什么是DOI,文献DOI怎么找? 1798043
邀请新用户注册赠送积分活动 877386
科研通“疑难数据库(出版商)”最低求助积分说明 806305