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对三种翼型风量测量装置 (平板型、流线型、三曲线型 )的阻力特性及流量特性进行的实验研究 ,结果表明 :翼型风量测量装置是一种适合于大管道流量测量的非标准测量元件 ,它能产生较大的压差信号 ,流动损失小 ,且具有良好的信号稳定性 ;结构参数截面比m、扩散角α对装置性能有较大影响。在小扩散角时 ,以平板型输出压差信号最大 ,而流线型的输出压差信号最小 ,但它的信号稳定性最好 ;在大扩散角时 ,以平板型输出压差信号最小 ,而曲线型的输出压差信号最大
The experimental research on the drag characteristics and flow characteristics of three airfoil air volume measuring devices (flat type, streamline type, three-curve type) shows that the airfoil air volume measuring device is a non-standard measurement suitable for large-pipe flow measurement Component, which can generate a large pressure difference signal, the flow loss is small, and has good signal stability; structural parameters of the cross section ratio m, diffusion angle α has a greater impact on device performance. In the small diffusion angle, the flat output pressure signal maximum, and the streamlined output pressure signal is the smallest, but its best signal stability; in a large diffusion angle, the output signal to the flat-panel pressure minimum, and the curve The largest output voltage difference signal