气体涡轮流量计前导流器的数值模拟与优化设计

发布时间：2018-04-16 09:39

本文选题：气体涡轮流量计 + 前导流器　；参考：《电子测量与仪器学报》2016年04期

【摘要】：前导流器是气体涡轮流量计的主要部件之一,其结构直接影响流量计的计量性能。以50 mm口径气体涡轮流量计的前导流器为优化对象,通过CFD数值模拟分析了不同结构参数前导流器的流场速度分布,引入了流场均匀性指数来评价整流效果,提出了针对前导流器结构的优化方案,探讨了优化对安装位置的要求,并对优化方案进行了实验验证。结果表明,导流体长度由25 mm加长至125 mm时,流场均匀性提高,流量计的线性度误差和重复性误差降低,压损减少13.92%;导流叶片由60 mm缩短至15 mm时,流场均匀性提高,流量计的计量性能改善,压损减少20.89%。该优化方法同样适用于其他口径涡轮流量计前导流器的结构优化。
[Abstract]:As one of the main components of gas turbine Flowmeter, its structure directly affects the metering performance of gas turbine Flowmeter.The flow field velocity distribution of different structure parameters is analyzed by CFD numerical simulation, and the flow field uniformity index is introduced to evaluate the rectifying effect by taking the preflow head of 50mm gas turbine Flowmeter as the optimization object.In this paper, an optimization scheme for the structure of the pilot is proposed, and the requirements for the installation position of the optimization are discussed, and the experimental verification of the optimization is carried out.The results show that when the length of the flow guide is increased from 25 mm to 125 mm, the uniformity of the flow field is improved, the linearity error and repeatability error of the Flowmeter are reduced, the pressure loss is reduced 13.92%, and the flow field uniformity is improved when the flow guide blade is shortened from 60 mm to 15 mm.The metering performance of the Flowmeter is improved and the pressure loss is reduced by 20.89.This optimization method is also suitable for the structural optimization of the preflow device of other turbine Flowmeter.
【作者单位】：天津大学电气与自动化工程学院;
【基金】：国家自然科学基金(50906061)资助项目
【分类号】：TH814

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