皮托管在气流测量中一些问题的探讨

Discussion on Pitot Static Tube Problems in Air Flow Measurement

皮托管在气流速度测量中受多种因素影响。怎样使测量的数据准确可靠,除了仪器设备外,还要找出影响测量结果的其他原因并对其修正,就显得十分重要。本文的主要目的就是探讨在气流测量中风速的有关修正问题(如水的密度、压力损失、压缩性影响)。以国家气象计量站的设备和测量数据为例,经过水的密度、压力损失、压缩性影响的修正,60m/s时,其修正量为-0.5m/s。这就是为什么在高速时,标准风速偏高的原因。这一结果对于国内国际比对,使气流速度的量值与世界统一具有重要意义。

wind speed in air flow measurement. For example, density of water, heat loss and compressibility of air. Take a data of measurement and apparatuses for center of national meteorological metrology an example. As 60m/s,its amendment value is -0. 5m/s. This result should be important interest in home and international comparison and make air flow speed numerical value is same with internationally.