公开(公告)号：US20050262937A1

公开(公告)日：2005-12-01

申请号：US10854133

申请日：2004-05-25

申请人： Charles Emmert ,  Dan Emmert ,  Edward Fizell ,  Christopher Knieper

发明人： Charles Emmert ,  Dan Emmert ,  Edward Fizell ,  Christopher Knieper

IPC分类号： G01F1/68 ,  G01F1/684 ,  G01F5/00

CPC分类号： G01F5/00 ,  G01F1/6842

摘要： A system for measuring air flow rate in a duct includes an air flow sensor and an air flow conditioning device for collecting and accelerating a portion of the total air stream to the sensor, which may be means as known in the art. The conditioning device includes two opposed converging walls defining a nozzle, preferably a venturi, the sensor being disposed in the throat of the nozzle. The surfaces of the venturi walls are textured to trip the boundary layer near the wall surface into turbulence to maintain attachment of flowing air to the walls even when the angle of attack of the air is significantly non-axial. The wall texturing may be random or may be an organized pattern. A further embodiment includes a second flow conditioner/sensor in parallel with the first whereby an averaged flow measurement is taken for a more accurate reading.

摘要翻译： 用于测量管道中的空气流速的系统包括空气流量传感器和用于收集和加速部分总气流到传感器的空气流量调节装置，其可以是本领域已知的装置。 调节装置包括限定喷嘴（优选文丘里管）的两个相对的会聚壁，该传感器设置在喷嘴的喉部中。 文丘里壁的表面被纹理化，以将壁面附近的边界层跳到湍流中，以保持流动的空气附着到墙上，即使当空气的迎角显着地不轴向时。 墙纹理可以是随机的或可以是有组织的模式。 另一个实施例包括与第一流动调节器/传感器平行的第二流量调节器/传感器，由此获得平均流量测量以获得更准确的读数。