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자료유형
학술저널
저자정보
저널정보
대한기계학회 Journal of Mechanical Science and Technology Journal of Mechanical Science and Technology Vol.19 No.1
발행연도
2005.1
수록면
173 - 180 (8page)

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초록· 키워드

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Feedwater flowing in the tube side of the number 5 high pressure feedwater heaters is heated by extraction steam from the high pressure turbine and drain water from the moisture separators and the number 6 high pressure feed water heaters and supplied into the steam generators. Because the extraction steam from the high pressure turbine is a two phase fluid of high temperature, high pressure, and high speed and changes direction after colliding with the impingement baffle, the shell wall of the number 5 high pressure feedwater heaters may be subjected to flow-accelerated corrosion. Wall thinning damage caused by the flow-accelerated corrosion has primarily occurred in carbon and low alloy steel piping. Components, such as feedwater heaters, condensers, etc., however, have recently experienced severe wall thinning damage, which will increase as operating time progresses. This paper describes the fluid mixing analysis study using PHOENICS code in order to determine root cause of the shell wall thinning of the feedwater heaters. To identify the relation between the wall thinning and the fluid behavior, the local velocity components in the x-, y-, and z-direction were compared with the wall thickness data by ultrasonic test.

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Abstract

1. Introduction

2. Model Description and Governing Differential Equations

3. Boundary Conditions And Numerical Analysis

4. Results And Discussion

5. Conclusions

Acknowledgement

References

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