Linearity and frequency response of Fleisch type pneumotachometers.

摘要: Some aspects of the linearity and frequency response flow measurement with Fleisch type pneumotachometers are considered. The transition from a uniform velocity distribution at entrance capillary tubes transducer to fully developed profile is discussed as one phenomena influencing set-up. Besides, an expression derived for pneumotachometer. responses measurements show good agreement theory. In range lower frequencies measuring set-up proved be largely determined by pressure connecting tubes. A simple way indicated measure latter. This, in combination calculated transducer, makes it fairly casy determine characteristics containing