摘要
研究旨在获取上游弯头安装条件下内锥流量计的性能和所需要的直管段长度。研制了100mm口径、β值分别为0.45、0.65、0.85三种结构类型的样机。开展了上游单弯头、同一平面上连续两个90。成s型结构双弯头及互成垂直平面上连续两个90°双弯头的仿真和实验研究,仿真和实验的介质均为常温水,雷诺数范围分别为0.498×10^5~4.98×10^5和0.14×10。~4.5×10^5。仿真结果与实验结论一致,并利用平均流出系数相对误差及附加不确定度作为安装条件影响的主要评价标准,给出了上游弯头安装条件内锥流量计所需的直管段长度。
In order to acquire the shortest straight pipe length and investigate the pertormance of cone flowmeter with installed upstream elbow, this study has put forward three different structure prototypes with 100mm diameters and the β values being 0. 45,0. 65,0. 85 respectively. Simulation and experiment investigations have been carried out with the installment of a upstream single 90° elbow, double closed 90° elbows of "S" shape under the same plane and double closed 90° elbows under the vertical plane, with the medium of normal temperature water and Reynolds numbers being 0. 498× 10^54. 98 × 10^5 and 0. 14× 10^5-4.5 × 10^5 respectively. The numerical simulation result is consistent with the experimental conclusion. Through both of them, we obtain the length of the straight pipe for the cone flowmeter while the effects of the relative error and additive uncertainty of the averaged discharge coefficient on the installation of upstream elbow have been considered.
出处
《实验流体力学》
EI
CAS
CSCD
北大核心
2010年第1期84-88,共5页
Journal of Experiments in Fluid Mechanics
基金
国家'863'计划资助项目(2007AA04Z180)
天津市应用基础与面上项目资助(200708JCYBJC11800)
关键词
内锥流量计
上游弯头
流出系数
雷诺数
计算流体动力学
V-cone flowmeter
upstream elbow
discharge coefficient
Reynolds number
com-putational flow dynamics