局部扇风机鉴定、风筒漏风率及风筒阻力的测定,都会遇到风筒内测风的问题。风筒内测风就是测定风筒内的静压、全压及风量等有关参数。以往,风筒内测风是用皮托管(实际上是用静压管与皮托管组合起来,变得很容易测量速压的一个仪器)进行测定。其测量方法有两种:一种是测出断面中 Local fan identification, air leakage rate and the windshield tube resistance determination, will encounter the wind tube wind measurement problems. Determination of wind within the hairdryer is measured inside the hairdryer static pressure, total pressure and air volume and other relevant parameters. In the past, the wind measuring wind was measured using a pitot tube (actually an instrument that was combined with a static tube and a pitot tube and became very easy to measure the speed pressure). There are two measurement methods: one is to measure the cross section