Due to the influence of turbulence flow effect and near-wall treatments on the results of inertance tube, the previous models based on 1-D and small pressure ratio have a poor agreement with the experimental dates. The Pulsatile turbulent flow in inertance tube was numerically modeled using the Reynolds-averaged Navier-Stokes equation approach. The commercially available computational fluid dynamics code (CFD) , FLUENT, was used for these studies. A two-dimensional mathematical model of inertance tube and reservoir was constructed and four different turbulence models were employed to study their influence on the results. It turned out that the k-ε turbulence model adopting enhanced wall treatment was in much better agreement with previous experimental measurements of phase angle than the standard k-ε turbulence model, the low Reynolds number turbulence model and the k-ω turbulence model. The flow characteristics of gas were further studied. It was found that the pressure deviates from sine wave compared with mass flow and velocity due to the variation of pressure loss.%湍流和近壁处理对惯性管计算结果有重要影响,这是造成基于一维、小压比的惯性管模型存在较大偏差的根本原因.借助商用计算流体动力学(CFD)软件F1uent,采用Reynolds时均方程对惯性管内气体流动进行数值模拟.构建包括惯性管和气库的二维轴对称数学模型.研究4种不同湍流模型对计算结果的影响.模拟结果表明:以调相角为标准,采用enhanced wall treatment的k-ε模型计算结果比采用壁面函数法的k-ε模型、低雷诺数k-ε模型和k-ε模型更接近实验值.在此基础上,进一步研究了管内气体的流动特性:质量流量和速度保持正弦波形,而压力波发生变形,其原因在于压力损失是一个和速度有直接关系的变化值.
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