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Study on the leak rate of fluid in welded pipes in leak-before-break analysis
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Journal: WELDING TECHNOLOGY, Year , Issue 5 , Page 21-23
Keyword:  先泄后断焊接管道泄漏速率Fluent;
Abstract: 先泄后断(LBB)技术已经广泛地应用于焊接压力容器及管道的设计中,该理论是指在压力容器和管道中的裂纹达到失稳状态以前,可以检测到通过该裂纹的流体的泄漏.使用计算机程序模拟了通过裂纹的流体泄漏速率;通过有限元分析程序Fluent,对简单情况下的单相流体在压力管道中裂纹不同张开方向上的泄漏速率进行模拟计算,并对其结果进行比较分析.得出泄漏速率与裂纹张开位移(COD)和裂纹长度的关系均不是线性关系,并且COD的扩展对泄漏速率的影响要大于裂纹长度对其的影响.因此,COD的扩展值是影响管道内流体泄漏速率的主要因素.
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