THỨ TƯ,NGÀY 22 THÁNG 4, 2020

The pressure huge difference results from the newest centrifugal force

Bởi Nguyễn Hoàng Phong

Cập nhật: 02/10/2022, 11:42

The pressure huge difference results from the newest centrifugal force

Elbow meter: A great differential tension can be obtained when a running water changes direction owed so you’re able to a pipeline change otherwise elbow, as shown inside the Figure step three less than. As tubing arms exists in vegetation, the purchase price for those m is really reasonable. However, the accuracy is extremely bad; there are only applied whenever reproducibility is enough or other circulate measurements was quite expensive.

Pitot pipe and you can annubar: New pitot pipe, shown when you look at the Figure 4 less than, methods the fresh new fixed and you will active challenges of your water on one part of brand new tube. The latest disperse rate is going to be computed regarding difference between the fresh new static and you may dynamic demands which is the speed head of your fluid disperse. A keen annubar includes multiple pitot hoses placed across the a pipeline to provide an approximation towards the speed reputation, as well as the full circulate are going to be computed according to the numerous measurements. Both the pitot pipe and you can annubar lead really small pressure falls, however they are perhaps not myself strong and ought to be studied just which have clean liquids.

Turbine: As the fluid streams from the wind turbine, they causes brand new wind turbine to become with an enthusiastic angular velocity you to definitely is proportional towards fluid circulate rate. Brand new frequency from rotation can be counted and you can always dictate disperse. Which detector should not be employed for slurries or possibilities sense high, rapid flow or stress version.

Vortex losing : Fluid vortices try molded against the looks delivered on tube. These types of vortices are made from this new downstream face when you look at the an excellent oscillatory fashion. The new shedding was sensed playing with a thermistor as well as the volume from losing is proportional in order to volumetric flow price.

Positive displacement: On these devices, new water are separated into private volumetric elements and also the amount out of points for each and every device time is mentioned. Such sensors bring high precision over a giant range. An example try a rainy take to meter.

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