均速管流量计优化设计的数值模拟  

The numerical simulation of the optimization design of averaging pitot tube

作　　者：朱莹[1] 王小华[1] 麻剑锋[1] 沈新荣[1] 

机构地区：[1]浙江大学流体工程研究所,杭州310027

出　　处：《工业仪表与自动化装置》2013年第1期57-59,90,共4页Industrial Instrumentation & Automation

摘　　要：根据流体力学计算方法,对300 mm口径管道对应的均速管流量计进行二维数值模拟,采用k-ωSST湍流模型及SIMPLE算法,首先得到均速管流量计流量系数随速度的变化特性;在其基础上,创新设计了一种新型的双体均速管流量计,这种新型均速管流量计较传统的威力巴流量计而言,在压力损失有限增加的前提下,能产生更高的输出压差和更低的流量系数。The paper presents numerical simulation （ two - dimensional） of the averaging pitot tube applied in the pipe with diameter of 300mm. In the calculation the turbulent model of k -ωSST and SIMPLE method were applied. Firstly, the relationship between the flow coefficient and velocity was investigated. Then a two -profile averaging pitot tube was innovatively desingned. The new tubes could offer higher pressure difference and lower flow coefficient at a limited cost on permanent pressure loss compared to the original model.

关 键 词：流量系数 均速管流量计 永久压力损失 

分 类 号：TH814[机械工程—仪器科学与技术]