摘要
为深入研究切向式涡轮流量传感器的工作机理,推导了流体对涡轮叶片的驱动力矩,得出切向式涡轮流量传感器仪表系数的数学表达式.依据湍流模式理论以及计算流体力学,提出涡轮转子Z方向力矩平衡分析法实现对涡轮转速θ的准确预测,进而对切向式涡轮流量传感器三维流场进行了分析,得出仿真仪表系数计算公式.全量程内仿真仪表系数KS与物理实验标定的仪表系数KP的对比表明,模拟计算仪表系数相对误差最大值为7.51%,说明构建的数值模型以及提出的分析方法能够准确反映切向式涡轮流量传感器内部流体的流动特性.
In order to study the operating principle of tangential type turbine flow sensor, the rotor driving torque was deduced and the meter factor was given. Based on computational fluid dynamics（CFD） and turbulence model, a method of the rotor-torque-balance in direction Z, which can predict the rotational speed of rotor precisely, was presented. The 3D flow field of tangential type turbine flow sensor was analyzed and the formula of numerical meter factor was obtained. Comparison between simulation results and the data of physical experiment showed that the simulation model of tangential type turbine flow sensor was acceptable. The maximum full-scale relative error of meter factor was 7.51%.
出处
《天津大学学报》
EI
CAS
CSCD
北大核心
2007年第9期1048-1053,共6页
Journal of Tianjin University(Science and Technology)
关键词
切向式涡轮流量传感器
转子力矩平衡
数值仿真
仪表系数
低流量
tangential type turbine flow sensor
rotor-torque-balance
numerical simulation
meter factor
low flow rate
