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首页> 外文会议>National Fluid Mechanics and Fluid Power Conference >CFD ANALYSIS OF THE PERFORMANCE CHARACTERISTICS OF TARGET FLOW METER
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CFD ANALYSIS OF THE PERFORMANCE CHARACTERISTICS OF TARGET FLOW METER

机译：靶流量计的性能特征的CFD分析

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Computational Fluid Dynamics (CFD) has emerged as a powerful tool for optimizing the design of any flowmeter for given conditions. The flow features obtained with CFD are more extensive as compared to experiments. The present study is an attempt to establish the effect of size and shape of the obstruction in the target flow meter on its performance using CFD. The commercially available CFD code "FLUENT 5.0" has been used after validating against the experimental results reported in literature. The parametric study has been carried out with 6 discs each of thickness (t) of 1 mm and diameter (d) varying from 18 mm to 48 mm in steps of 6 mm for a fixed pipe diameter resulting in diameter ratios (β = d/D) in the range 0.3 to 0.8. The values of flow coefficient (K) and drag coefficient (C_d) have been evaluated as a function of Reynolds number. It has been found that for a given geometry of the target flow meter, the value of flow coefficient and drag coefficient remain constant in the turbulent region (Re>4000). The flow coefficient decreases with increase in diameter ratio (β) whereas the drag coefficient increases. A third governing parameter i.e. permanent pressure loss coefficient is also calculated and it was found that the permanent pressure loss for a target flow meter increases with increase in β. Further, parametric analysis is also carried out by varying the disc thickness of the target flow meter from 1 mm to 3 mm for β = 0.4. It has been found that the value of flow coefficient increases with increase in thickness of the disc whereas the drag coefficient value reduces which can be attributed to the reduction in size of the wake.
机译：计算流体动力学（CFD）已成为优化任何流量计的设计的强大工具，以便在给定的条件下。与实验相比，CFD获得的流量特征更广泛。本研究表明，使用CFD建立靶流量计中障碍物尺寸和形状的效果。在验证文献中报告的实验结果后，已使用市售的CFD码“Fluent 5.0”。参数研究已经用6个圆盘进行，每个厚度（t）为1mm，直径（d），其步骤为6mm至48mm，用于固定管道直径，导致直径比率（β= D / d）在0.3至0.8的范围内。流量系数（k）和拖动系数（C_D）的值已被评估为reynolds编号的函数。已经发现，对于目标流量计的给定几何形状，流量系数和拖动系数的值在湍流区域（Re> 4000）中保持恒定。流量系数随着直径比（β）的增加而降低，而拖动系数增加。第三控制参数I.。还计算了永久性压力损失系数，发现目标流量计的永久压力损失随β增加而增加。此外，还通过改变目标流量计的盘厚度为1mm至3mm的β= 0.4来进行参数分析。已经发现，流量系数的值随着盘的厚度的增加而增加，而拖动系数值降低，这可以归因于唤醒尺寸的减小。

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