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After analyzing a flow meter, you observe that it has enough straight-pipe lengths before and after the meter. What is the major reason behind these pipe lengths?

After analyzing a flow meter, you observe that it has enough straight-pipe lengths before and after the meter. What is the major reason behind these pipe lengths? Correct Answer Stabilize the flow profile within the flowmeter

Concept:

Flowmeter:

  • It is a device that measures the flow rate i.e. the quantity of a fluid flowing in unit time in an open or closed conduit.
  • Flowmeter is identified by its operating principle.
  • In flowmeter recommend various straight pipe lengths, both upstream and downstream, so as to get a fully developed desirable flow profile without disturbance.

The importance of straight-pipe lengths before and after the flow meter is as follows:

  • Fluid profile distortion may occur due to an obstruction caused, e.g., by a partially open valve or a bend.
  • When the flow faces a bend, it is forced against the pipe wall at the outside of the bend, then again rebounds towards the opposite side of the pipe, forming vortices.
  • This will cause a single vortex or swirl formation in a large time period.
  • So, it is noted that flow-profile distortion and swirl are two major disturbances encountered in flow metering.
  • This might cause a partial blockage at a pipe by various fittings such as tee, elbow, valve, etc.
  • In order to circumvent these problems, piping configuration for flowmeter, i.e., straight length upstream/downstream is very important.

Related Questions

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