方形均速管流量系数影响因素数值仿真研究  

Numerical Simulation Study on Factors Affecting Flow Coefficient for Square Averaging Pitot Tube

作　　者：刘亚成[1] 张吉礼[1] 赵天怡[1] 

机构地区：[1]大连理工大学建筑能源研究所,辽宁大连116024

出　　处：《仪表技术与传感器》2015年第12期92-96,共5页Instrument Technique and Sensor

基　　金：国家自然科学基金项目(51378005);国家科技支撑计划项目(2011BAJ03B12-3;2013BAJ10B02-03);中央高校基本科研业务费专项资金项目(DUT14ZD210;DUT12RC(3)25)

摘　　要：为研究方形均速管横截面的当量直径De、静压孔角度θ、风管风速v这3个因素对流量系数的影响,将3个因素依据正交试验理论分成九组,用CFD数值仿真的方法来进行研究分析。为找到最佳的数值仿真方法,用Standard k-ε、Standard k-ω、LES这3种湍流模型进行CFD仿真计算,将仿真计算结果与实流试验结果对比,发现LES模型的计算结果与实际比较相符。当量直径De、静压孔角度θ是影响均速管流量系数的主效应因素,风管风速v对流量系数的影响很小。The impacts of the averaging pitot tube equivalent diameter De,the static pressure hole angle θ and the average wind speed v on the flow coefficient were numerical studied in this paper. Three factors were divided into nine groups which were according to the orthogonal theory,then CFD numerical simulation were performed for research analysis. In this study,three different turbulence models including the Standard k- ε model,Standard k- ω model and LES model were taken into consideration for optimal results obtained. By numerical comparison,it is found that the LES model gives good agreement with experimental,while,the averaging pitot tube equivalent diameter Deand the static pressure hole angle θ are the main affecting factors,which have a greater impact on flow coefficient than duct average wind speed v.

关 键 词：均速管 流量系数 数值模拟 大涡模拟 

分 类 号：TH814[机械工程—仪器科学与技术]