Air flow measurement system which is not affected by the effect of changes in the flow field

摘要

Including air flow adjusting device for accelerating the sensor are collected SOLVED air flow sensor (12), a portion (28) the total air flow and (122), the air duct (116) in and provides a system for measuring the flow rate (100). (122), including (126a, 126b) the nozzle, wall converging to two opposing forming a venturi preferably [MEANS FOR SOLVING PROBLEMS] adjusting device. The sensor is placed in the throat of the nozzle (132). Texture is formed on a surface (126a, 126b) of the venturi wall, by this, the turbulence trips (136a, 136b) and the boundary layer near the surface of the wall, angle of attack of the air is substantially in the axial direction It can be outside on, and leave the air flow is attached on the wall. Texture of the wall may be random, or may be organized in a predetermined pattern (180,182,184,186,188,190,192,194,196,198). The (180) is an array of (170) similar to the recesses of the surface of the golf ball preferably trip current pattern. The flow profile, it is less affected by changes in the duct upstream of the form. [Selection] Figure Figure 1