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Twi-Fluid Model Approach for Transient Analysis of Free-Surface-Pressurized Flows

机译:Twi-Fluid模型方法用于自由表面加压流的瞬态分析

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摘要

A new computational model is developed here to analyze the influence of entrapped air on free- surface-pressurized flows. A virtual slot with ceiling on the top of the pipe is introduced to treat a separated gas-liquid flow. This model is a modified model of Preissmann's and is applicable not only to open channel flow and closed conduit flow but also pressurized flow with entrapped air. Compared to experimental results using the model of 1/50 scale, the calculation results show that the entrapped air in horizontal pipe advances the time of pressure rising and makes the maximum value of pressure higher.
机译:在此开发了一种新的计算模型,以分析截留的空气对自由表面加压流的影响。引入了一个在管子顶部带有天花板的虚拟槽,以处理分离的气液流。该模型是Preissmann模型的改进模型,不仅适用于明渠流和封闭管道流,而且适用于夹带空气的加压流。与使用1/50比例模型的实验结果相比,计算结果表明,水平管中截留的空气提前了压力上升的时间,并使压力的最大值更高。

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