Characteristics of moisture losses in low pressure steam turbine stages

被引：0

作者：

Kawagishi, Hiroyuki ^{[1
]}

Ootomo, Fumio ^{[1
]}

Goto, Koichi ^{[1
]}

Saeki, Hiroshi ^{[1
]}

Tsukuda, Tomohiko ^{[1
]}

Hashidate, Tadayuki ^{[1
]}

Onoda, Akihiro ^{[1
]}

Kawasaki, Sakae ^{[1
]}

Shibukawa, Naoki ^{[1
]}

Okuno, Kenichi ^{[1
]}

Niizeki, Yoshiki ^{[1
]}

机构：

[1] Power and Industrial Systems Research and Development Center, Toshiba Corporation, Tsurumi-ku, Yokohama, 230-0045, 2-4, Suehiro-cho

来源：

Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B | 2013年 / 79卷 / 804期

关键词：

Moisture loss; Non-equilibrium expansion; Steam turbine; Supersaturation; Wet steam;

D O I：

10.1299/kikaib.79.1724

中图分类号：

学科分类号：

摘要：

This paper describes characteristics of moisture losses in low pressure steam turbine stages. Steam turbines operating under wet-steam conditions experience thermodynamic and mechanical losses caused by the presence of moisture. In order to predict the moisture losses, physics-based moisture loss models are developed. The moisture loss models are composed of six categories: supersaturation loss, condensation loss, acceleration loss, braking loss, capturing loss and pumping loss. These losses are calculated according to the wetness levels in the stationary blade & moving blade rows, and defined by the functions of steam properties and design factors of turbine stages. The loss models are compared to full-size low pressure steam turbine data for prediction of the overall moisture losses. The developed loss models are found to be effective for designing wet-steam turbines from the standpoint of calculation accuracy and calculation time. © 2013 The Japan Society of Mechanical Engineers.

引用

页码：1724 / 1736

页数：12

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