ANALYSIS OF TEMPERATURE FIELD AND THERMAL STRESS FOR EXTERNALLY CONNECTED PIPE SOCKETS OF REHEATER BY USING THE FINITE ELEMENT METHOD

doi:10.19666/j.rlfd.2005.05.005

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ANALYSIS OF TEMPERATURE FIELD AND THERMAL STRESS FOR EXTERNALLY CONNECTED PIPE SOCKETS OF REHEATER BY USING THE FINITE ELEMENT METHOD

Thermal Power Generation Issue 5, Pages: 17-19(2005)

更新时间：2025-09-28

- ANALYSIS OF TEMPERATURE FIELD AND THERMAL STRESS FOR EXTERNALLY CONNECTED PIPE SOCKETS OF REHEATER BY USING THE FINITE ELEMENT METHOD
- 作者机构：
  
  1. 浙江大学,浙江,杭州,310027
  2. ,浙江,杭州,310027
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.2005.05.005
  CLC： TK223.32
- Published：2005
- 稿件说明：
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ANALYSIS OF TEMPERATURE FIELD AND THERMAL STRESS FOR EXTERNALLY CONNECTED PIPE SOCKETS OF REHEATER BY USING THE FINITE ELEMENT METHOD[J]. Thermal Power Generation, 2005, (5): 17-19.
DOI：

ANALYSIS OF TEMPERATURE FIELD AND THERMAL STRESS FOR EXTERNALLY CONNECTED PIPE SOCKETS OF REHEATER BY USING THE FINITE ELEMENT METHOD[J]. Thermal Power Generation, 2005, (5): 17-19. DOI： 10.19666/j.rlfd.2005.05.005.

摘要

进行了再热器对空排气管三通管座的温度场和热应力的有限元分析

并选取机组起动后第50min、200min和480min3个点的数据加以讨论。结果发现

由于管道内形成的冷凝水周期性地回流或溢流至再热器外接管内侧

使角焊缝应力集中处形成了热疲劳

并造成管子产生裂纹。

Abstract

The temperature field and thermal stress of tee pipe sockets for exhaust pipes to atmosphere from reheater have been analyzed by using the finite element method

the data at time points of 50

200

and 400 minutes after startup being discussed. It is found from the results that the main cause leading to crack on pipes is as follows: When condensed water in said pipes periodically flows back or overflows to the interior of externally connected pipes on reheater

making the corner welding seams where the thermal stress being concentrated to produce thermal fatigue.

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