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NUMERICAL MODELING OF CONDENSING TWO-PHASE FLOWS

机译:凝结两相流的数值模拟

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摘要

A methodology for modeling condensation in the presence of noncondensables, based on the stagnant film (Couette flow) model, and fully compatible with the numerical algorithm in the RELAP5 computer program, and with the stability-enhancing two-step (SETS) and the interphase slip (IPSA) algorithms, has been developed. The methodology treats the coupling between the heat and mass transfer processes rigorously, and allows for an implicit representation of the exchange terms at the gas-liquid interphase, without requiring any modification to the basic numerical algorithms. The numerical solution schemes in RELAP5 and SETS algorithms are reviewed and the way to incorporate the developed condensation model into these algorithms is shown. Accordingly, the RFLAP5 / MOD3 computer code is modified, and is validated successfully against available experimental data. [References: 34]
机译:一种基于停滞膜(Couette流)模型,在不凝结物存在的情况下对凝结进行建模的方法,该方法与RELAP5计算机程序中的数值算法以及稳定性增强的两步法(SETS)和界面已开发出滑动(IPSA)算法。该方法严格地处理了传热和传质过程之间的耦合,并允许隐含表示气液界面处的交换项,而无需对基本的数值算法进行任何修改。回顾了RELAP5和SETS算法中的数值求解方案,并给出了将开发的冷凝模型纳入这些算法的方法。因此,修改了RFLAP5 / MOD3计算机代码,并针对可用的实验数据成功进行了验证。 [参考:34]

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