Abstract
The step response of the turbine gas meter has been studied experimentally. Using the specially developed method the turbine gas meter rotation inertia time constant during step response has been evaluated. It has been found that the time constant depends not only on the final value of flow rate, but also on the current rotation frequency of the meter rotors. The results can be used for calculating the dynamic error of different types of tachometric meters with pulsing flow rate. DOI: http://dx.doi.org/10.5755/j01.mech.19.5.5544
Highlights
Turbine gas meters (TGM) are widely used for natural gas accounting
This kind of representation of the results enables to understand the nature of response
A straight line means that the response varies with time exponentially with the constant exponent, and the time constant remains unchangeable
Summary
Turbine gas meters (TGM) are widely used for natural gas accounting. These meters belong to the tachometric flow meter class. The characteristic particularity of their design is the presence of the rotating parts which rotation speed is associated with the flow rate. Operation under unsteady flow conditions strongly impacts the metrological characteristics of the meter. Due to inertia of the meters, response slows down and the so-called dynamic error of measurement appears. The effect of alternating flow on the behaviour of different type tachometric flow meters is similar, because in all these cases rotation occurs due to flow effects. Because of certain differences of operation principle, the effect should not be completely identical
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