湍流模型对双支撑型V锥流量计的适用性研究

发布时间：2018-01-24 20:16

本文关键词： 湍流模型 V锥流量计双支撑流出系数线性度误差仿真　出处：《仪器仪表学报》2015年02期 　论文类型：期刊论文

【摘要】：本研究旨在探索一种适用于双支撑型V锥流量计仿真工作的湍流模型。以50 mm、100 mm、200 mm口径共计6种样机为研究对象,在常温常压条件下,以水为介质,雷诺数范围为1.0×104~29.9×104,分别采用标准k-ε、RNG k-ε以及SST k-ω3种湍流模型对其流出系数及其线性度误差指标进行仿真预测。为验证仿真准确度,同时开展实流实验研究,将仿真预测结果与实流实验进行对比,结果表明SST k-ω模型对于不同结构的V锥流量计的仿真线性度误差在0.04%~0.32%,与实流实验吻合较好。利用SST k-ω模型预测的流出系数与实验数据的平均误差为6.6%,优于经典的k-ε模型,更适用于双支撑型V锥流量计流场仿真和流出系数的预测。
[Abstract]:The purpose of this study is to explore a turbulence model suitable for the simulation of a double-supported V-cone Flowmeter with a total of 6 prototypes of 50mm to 100mm / 200mm caliber as the object of study. Under the condition of normal temperature and atmospheric pressure, the Reynolds number is in the range of 1.0 脳 10 ~ (4) N ~ (29. 9) 脳 10 ~ (4) with water as the medium. The standard k- 蔚 is used respectively. The RNG k- 蔚 and SST k- 蠅 turbulence models were used to predict the efflux coefficient and its linearity error index. To verify the simulation accuracy, the real flow experiments were carried out at the same time. The simulation results are compared with the real flow experiments. The results show that the simulation linearity error of the SST k- 蠅 model for different structures of V-cone Flowmeter is 0.04% or 0.32%. The average error between the SST k- 蠅 model and the experimental data is 6.6, which is better than the classical k- 蔚 model. It is more suitable for the simulation of flow field and the prediction of outflow coefficient of double supported V-cone Flowmeter.
【作者单位】：天津大学电气与自动化工程学院;天津市过程检测与控制重点实验室;
【基金】：国家自然科学基金(60974118)资助项目
【分类号】：TH814
【正文快照】： 1引言差压流量计是工业中应用非常广泛的一类流量计,尤其是在石油、化工、天然气等领域有重要的应用。V锥流量计诞生于20世纪80年代,与孔板、文丘里等经典的标准差压流量计相比具有抗脏污介质、安装需要的前后直管段短、适应强旋流环境等优点[1-2]。由于V锥流量计尚不存在国际

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