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http://dx.doi.org/10.5050/KSNVE.2013.23.10.895

Characteristics of Blade Force by Nozzle Passing Steam  

Lee, Byounghak (Korea Hydro and Nuclear Power Co., LTD.)
Park, Jongho (Dept. of Mechanical Engineering Chungnam National University)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.23, no.10, 2013 , pp. 895-901 More about this Journal
Abstract
Last blades of LP turbine in nuclear power plant are the highly damaged part and suffered from nozzle steam impulses during the turbine operation. Nozzle impulse is known as a common cause of damage or failure in the turbine blade and results from steam flow distortions due to uneven steam flow patterns between the stationary blade vanes. If impulse force was continuously acting on the blade for a long time, crack or wear will occur in weak parts such as root. So, it is important to know variation of nozzle impulse during the blade moving. But there is no way to measure and estimate the magnitude and direction of nozzle impulse. Therefore, this study was performed to know the variation of nozzle impulse force according to the positions of the blade and to obtain blade equivalent force and torque. This results can be used for blade stress estimation.
Keywords
Turbine Blade; Bending Force; Nozzle Impulse; Nuclear Power Plant;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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