PREDICTING GASKET LEAK RATES USING A LAMINAR-MOLECULAR FLOW MODEL

机译：使用层分子流量模型预测垫圈泄漏率

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The tightness characterization of gaskets used in static seal applications, such as bolted flanged connections, is achieved by performing leakage tests with a single fluid, usually a gas like helium. Attempts made in the past to predict gasket leakage with other gases had limited success unless the leak flow regime through the gasket was predominately laminar, which is not the case with most of the gaskets. In this work, a new gasket leak flow model that combines both molecular and laminar flow regimes is developed to predict the gasket leak rate under different pressures and with different gases. The Laminar-Molecular Flow (LMF) model is first constructed around a reference pressure for which the fraction of the total leakage that occurs through laminar flow channels is established. This fraction is computed using a simple leakage test performed with one gas and at least two different pressures. The model is then tested against experimental leak data obtained from two different gaskets and four gases and is shown to produce accurate predictions.

机译：在静密封应用中，如螺栓法兰连接中使用的垫片的密封性表征，通过用单一的流体，通常是像氦的气体进行泄漏测试来实现。在过去提出来预测与其他气体泄漏垫圈尝试了有限的成功，除非通过衬垫泄漏流态是主要层，这是不与大多数垫圈的情况下。在这项工作中，结合了分子和层流制度是开发出一种新垫片泄漏流量模型来预测不同的压力下，并与不同的气体垫片泄漏率。层状-分子流（LMF）模型首先围绕针对其确定了通过层流道发生总泄漏的分数参考压力构成。此级分使用与一个气体和至少两种不同的压力下进行简单的漏电测试计算的。该模型然后对从两个不同的垫片和四种气体获得的实验数据泄漏测试，并示出为产生准确的预测。

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《ASME Pressure Vessels and Piping Conference》|2005年||共10页
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Luc Marchand; Michel Derenne; Vincent Masi;
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PREDICTING GASKET LEAK RATES USING A LAMINAR-MOLECULAR FLOW MODEL

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