Performance and internal flow of an undershot-type cross-flow water turbine

被引：0

作者：

Nishi, Yasuyuki ^{[1
]}

Inagaki, Terumi ^{[1
]}

Omiya, Ryota ^{[1
]}

Fukutomi, Junichiro ^{[1
]}

机构：

[1] Ibaraki University, Hitachi-shi, Ibaraki, 316-8511

来源：

Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B | 2013年 / 79卷 / 800期

关键词：

Cross-flow turbine; Free surface; Internal flow; Open channel; Performance; Water turbine;

D O I：

10.1299/kikaib.79.521

中图分类号：

学科分类号：

摘要：

An undershot-type cross-flow water turbine does not require a casing for open channels and hence considerable simplification is attained. However, because this water turbine does not have a casing and has a free surface, it is believed that the internal flow considerably changes with the rotational speed. In this study, the performance and internal flow of the undershot-type cross-flow water turbine at a constant flow rate were investigated by an experiment and numerical analysis, and the following facts were clarified. The first-stage inlet area and the second-stage inlet and outlet areas are reduced with increase in rotational speed. Shock loss at the second- and first-stage areas is dominant in low- and high-rotational-speed regions, respectively. Moreover, shock loss has a considerable influence on the performance of this water turbine in low- and high-rotational-speed regions. ©2013 The Japan Society of Mechanical Engineers.

引用

页码：521 / 532

页数：11