翼型风量测量装置的特性研究

CHARACTERISTICSTUDY OF A WING-FLOW MEASURING INSTRUMENT

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 。

Experiments are made to study the drag and flow characteristics of three different types of instruments (flat type,streamline type,three-curve type).The resluts of measurement show that the higher pressure difference signal,the lower losses and better stableness can been obtained by using this kind of non-standard unit.Furthermore,characteristics is effected by the area ratio M and the diffusion angle α.Of these kinds of instunment,at a low α number the flat type can obtain the highest pressure difference signal.The streamline type can obtain the lowest output pressure difference signal,but with the best stableness.However, the characteristics is on the contrary,at a high α number.